View S-1702_2939685.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

rev.1.1 _00 ultra-low current consumption 150 ma voltage regulator with built-in high-accuracy voltage detector and reset input function S-1702 series seiko instruments inc. 1 the S-1702 series, developed based on cmos technology, is a 150 ma output positive voltage regulator with a low dropout voltage, a high-accuracy output voltage, and low current consumption. the S-1702 series includes a voltage regulator with high-accuracy output voltage of 1.0% allowing to use a ceramic capacitor of 1.0 f or more, and a voltage detector that monitors the output/input voltage of the regulator. it also includes an overcurrent protector that prevents the output current from exceeding the current capacitance of the output transistor and an output forcible discharge circuit for the regulator operation off. small snt-6a package is available for the S-1702 series. and an external small capacitor can be used, enabling high-density mounting. its super-low current consumption makes the S-1702 series ideal for mobile devices. ? features regulator block ? output voltage: 1.5 v to 5.5 v, selectable in 0.05 v step ? high-accuracy output voltage: 1.0% ? ultra-low current consumption: current consumption of regulator block: 9 a typ., 16 a max. ? high peak current capability: 150 ma output (at v in v out(s) + 1.0 v) *1 ? built-in on/off discharge circuit: longer battery life, discharges output load instantaneously ? high ripple rejection: 70 db typ. (at 1.0 khz) ? built-in overcurrent protector: limit s overcurrent of output transistor detector block ? output voltage: 1.3 v to 5.2 v, selectable in 0.05 v step ? built-in high-accuracy voltage detector: 1.0% monitoring output/input or monitoring external input by option (detector output) ? external reset input: forcible assertion of detec tor output by external reset pin (resx) input overall ? correlation temperature gradient in t he regulator and the detector blocks ? ultra-low current consumption: during operation *2 : 10 a typ., 18 a max. ? small package: snt-6a ? lead-free product *1. attention should be paid to the power dissipation of the package when the output current is large. *2. excluding current flowing in pull-up and pull-down resistors connected to the on / off or resx pins ? applications ? wireless power supply circui t block for cellular phones ? power supply circuit block for health care products ? power supply circuit block for various mobile devices ? package drawing code package name package tape reel land snt-6a pg006-a pg006-a pg006-a pg006-a
ultra-low current consumption 150 ma voltage regulator with built-in high-accuracy voltage detector and reset input function S-1702 series rev.1.1 _00 seiko instruments inc. 2 ? block diagrams 1. S-1702 series a type to h type discharge shunt function by on / off and resx pins product type detector monitor voltage control by on / off pin control by resx pin a v out { { b v out { { d v out { { f v in { { h v in figure 1 2. S-1702 series j type and k type (external input detection type) product type detector monitor voltage discharge shunt function by on / off pin j external input { k external input figure 2
ultra-low current consumption 150 ma voltage regulator with built-in high-accuracy voltage detector and reset input function rev.1.1 _00 S-1702 series seiko instruments inc. 3 3. S-1702 series l type to n type, p type (external delay type) product type detector monitor voltage discharge shunt function by on / off pin l v out { m v out n v in { p v in overcurrent protector on/off circuit reference voltage circuit on / off vin cd vout vss vdout delay circuit voltage detector reset circuit logic circuit reference voltage circuit output circuit figure 3
ultra-low current consumption 150 ma voltage regulator with built-in high-accuracy voltage detector and reset input function S-1702 series rev.1.1 _00 seiko instruments inc. 4 ? product name structure 1. product name S-1702 x x x xx - i6t1 g package abbreviation and ic packing specifications *1 i6t1: snt-6a , tape product output voltage value of regulator and detection voltage value of detector *2 00 and 01 (two-digit numeric option code) input type of resx and on / off pins *3 a to h, j (one-digit alphabetical option code) output type of vdout pin *4 a to h, j (one-digit alphabetical option code) product type *5 a to h, j to n, p (one-digit alphabetical option code) *1. refer to the tape specificati ons at the end of this book. *2. refer to table 4 of ?2. function list according to product type? . *3. refer to table 3 of ?2. function list according to product type? . *4. refer to table 2 of ?2. function list according to product type? . *5. refer to table 1 of ?2. function list according to product type? .
ultra-low current consumption 150 ma voltage regulator with built-in high-accuracy voltage detector and reset input function rev.1.1 _00 S-1702 series seiko instruments inc. 5 2. function list according to product type table 1 product types discharge shunt function option code on / off pin application resx pin application delay type detector monitor voltage control by on / off pin control by resx pin a on / off resx internal v out { { b on / off resx internal v out { c on / off resx internal v out { d on / off resx internal v out e on / off resx internal v in { { f on / off resx internal v in { g on / off resx internal v in { h on / off resx internal v in j on / off sense internal v sense { ? k on / off sense internal v sense ? l on / off cd external v out { ? m on / off cd external v out ? n on / off cd external v in { ? p on / off cd external v in ? table 2 output types of vdout pin option code output type hysteresis a nch open drain output 5.0% b cmos output (v out drive) 5.0% c cmos output (v in drive) 5.0% d nch open drain output 2.5% e cmos output (v out drive) 2.5% f cmos output (v in drive) 2.5% g nch open drain output none h cmos output (v out drive) none j cmos output (v in drive) none
ultra-low current consumption 150 ma voltage regulator with built-in high-accuracy voltage detector and reset input function S-1702 series rev.1.1 _00 seiko instruments inc. 6 table 3 input types of resx and on / off pins option code resx pin on / off pin a no pull-up/pull-down resistor no pull-up/pull-down resistor b no pull-up/pull-down resistor pull-up c no pull-up/pull-down resistor pull-down d pull-up no pull-up/pull-down resistor e pull-up pull-up f pull-up pull-down g pull-down no pull-up/pull-down resistor h pull-down pull-up j pull-down pull-down table 4 output voltage values of regulator and detection voltage values of detector option code output voltage detection voltage 00 3.1 v remark please contact our sales office for products with an output voltage or detection voltage other than those specified above.
ultra-low current consumption 150 ma voltage regulator with built-in high-accuracy voltage detector and reset input function rev.1.1 _00 S-1702 series seiko instruments inc. 7 ? pin configuration table 5 pin no. symbol description 1 vin input voltage pin 2 on / off power-off pin resx external reset pin (S-1702axx to hxx) cd external delay capacitor connection pin (S-1702lxx to nxx, pxx) 3 sense detector sense pin (S-1702jxx, kxx) 4 vss gnd pin 5 vdout detector output voltage pin 6 vout regulator output voltage pin snt-6a top view 1 2 3 4 6 5 figure 4
ultra-low current consumption 150 ma voltage regulator with built-in high-accuracy voltage detector and reset input function S-1702 series rev.1.1 _00 seiko instruments inc. 8 ? absolute maximum ratings table 6 (ta = 25c unless otherwise specified) item symbol abso lute maximum rating unit v in v ss ? + ? + ? + ? + ? + ? + ? + ? + *1 mw operating ambient temperature t opr ? + ? + *1. when mounted on board [mounted board] (1) board size : 114.3 mm caution the absolute maximum ratings are rated values exceeding which the product could suffer physical damage. these values must therefor e not be exceeded under any conditions. ambient temperature (ta) [c] 0 50 100 150 300 100 0 500 200 400 power dissipation [p d ] (mw) figure 5 power dissipation of package
ultra-low current consumption 150 ma voltage regulator with built-in high-accuracy voltage detector and reset input function rev.1.1 _00 S-1702 series seiko instruments inc. 9 ? electrical characteristics 1. common to series (S-1702axx to hxx, jxx to nxx, pxx) table 7 (1 / 2) entire circuit (ta = 25c unless otherwise specified) item symbol conditions min. typ. max. unit test circuit current consumption during operation *1 i ss v in = v out(s) + 1.0 v ? 10 18 a 2 regulator block item symbol conditions min. typ. max. unit test circuit output voltage *2 v out(e) v in = v out(s) + 1.0 v, i out = 30 ma v out(s) 0.99 v out(s) v out(s) 1.01 v 1 output current *3 i out v in > v out(s) + 1.0 v 150 *8 ? ? ma 3 1.5 v < v out(s) 2.0 v ? 0.54 0.58 v 1 2.0 v < v out(s) 2.5 v ? 0.23 0.35 v 1 2.5 v < v out(s) 3.0 v ? 0.2 0.3 v 1 3.0 v < v out(s) 3.3 v ? 0.15 0.23 v 1 dropout voltage *4 v drop i out = 100 ma 3.3 v < v out(s) 5.5 v ? 0.14 0.21 v 1 line regulation ? v in ? v out ? v out1 v out(s) + 0.5 v < v in < 6.5 v, i out = 30 ma ? 0.05 0.2 %/v 1 load regulation ? v out2 v in = v out(s) + 1.0 v, 10 a < i out < 100 ma ? 20 40 mv 1 output voltage temperature coefficient *5 ? ta ? v out ? v out v in = v out(s) + 1.0 v, i out = 30 ma, ? 40c ta + 85c *9 ? 100 300 ppm/ c 1 current consumption during operation *1 i ss1 v in = v out(s) + 1.0 v, resx and on / off pins enabled for operation, no load ? 9 16 a 2 input voltage v in ? 2 ? 6.5 v ? on / off pin input voltage ?h? v sh1 v in = v out(s) + 1.0 v, r l = 1.0 k ? 1.2 ? ? v 4 on / off pin input voltage ?l? v sl1 v in = v out(s) + 1.0 v, r l = 1.0 k ? ? ? 0.3 v 4 S-1702xxa ? 0.1 ? 0.1 a 4 S-1702xxd ? 0.1 ? 0.1 a 4 on / off pin input current ?h? i sh1 v in = 6.5 v, v on / off = 6.5 v S-1702xxg ? 0.1 ? 0.1 a 4 S-1702xxa ? 0.1 ? 0.1 a 4 S-1702xxd ? 0.1 ? 0.1 a 4 on / off pin input current ?l? i sl1 v in = 6.5 v, v on / off = 0 v S-1702xxg ? 0.1 ? 0.1 a 4 1.5 v v out(s) < 3.1 v ? 70 ? db 5 ripple rejection rr v in = v out(s) + 1.0 v, f = 1.0 khz, ? v rip = 0.5 vrms, i out = 30 ma 3.1 v v out(s) 5.5 v ? 65 ? db 5 short-circuit current i short v in = v out(s) + 1.0 v, on / off pin enabled for operation, v out = 0 v ? 300 ? ma 5
ultra-low current consumption 150 ma voltage regulator with built-in high-accuracy voltage detector and reset input function S-1702 series rev.1.1 _00 seiko instruments inc. 10 table 7 (2 / 2) detector block (ta = 25c unless otherwise specified) item symbol conditions min. typ. max. unit test circuit detection voltage *6 ? ? ? ? ? ? ? ? ? ? ? = ? + ? = = ? + *1 i ss2 2.3 v ? = *7 ? ? ? ? ? ta = ? + *9 ? *1. excluding current flowing in pull-up and pull-down re sistors connected to the on / off or resx pins *2. v out(s) : specified output voltage v out(e) : actual output voltage at the fixed load the output voltage when fixing i out (= 30 ma) and inputting v out(s) + *3. the output current at which the ou tput voltage becomes 95% of v out(e) after gradually increasing the output current. *4. v drop = v in1 ? v out3 is the output voltage when v in = v out(s) + = *5. the change in temperature [mv/c] of the regulator output voltage is calculated using the following equation. ? ? ? *1 = v out(s) [v] *2 ? [ppm/c] *3 1000 ? *1. the change in temperature of the output voltage *2. specified output voltage *3. output voltage temperature coefficient *6. ? ? *7. the change in temperature [mv/c] of the detector detection voltage is calcul ated using the following equation. ? ? ? ? ? *1 = ? *2 ? ? [ppm/c] *3 1000 ? *1. the change in temperature of the detection voltage *2. specified detection voltage *3. detection voltage temperature coefficient *8. the output current can be at least this value. due to restrictions on the package power dissipation, this va lue may not be satisfied. att ention should be paid to the power dissipation of the package when the output current is large. this specification is guaranteed by design. *9. since products are not screened at high and low temperatur es, the specification for this temperature range is guaranteed by design, not tested in production.
ultra-low current consumption 150 ma voltage regulator with built-in high-accuracy voltage detector and reset input function rev.1.1 _00 S-1702 series seiko instruments inc. 11 2. discharge shunt circuit (discharge shunt function) (S-1702axx, bxx, cxx, exx, fxx, gxx, jxx, lxx, nxx) table 8 (ta = 25c unless otherwise specified) item symbol conditions min. typ. max. unit test circuit ?l? output, nch on resistor r low v ds = 0.5 v, v gs = 6.5 v ? 100 ? ? 3 3. detector output circuit (vdout pin) table 9 nch open drain output (S-1702xax, xdx, xgx) (ta = 25c unless otherwise specified) item symbol conditions min. typ. max. unit test circuit output current i dout1 output transistor: nch, v ds = 0.5 v, v dd = 1.2 v 1.36 2.55 ? ma 7 leakage current i leak output transistor: nch, v ds = 5.5 v, v dd = 5.5 v ? ? 100 na 7 cmos output (S-1702xbx, xcx, xex, xfx, xhx, xjx) item symbol conditions min. typ. max. unit test circuit i dout2 output transistor: nch, v ds = 0.5 v, v in = 1.2 v 1.36 2.55 ? ma 7 output current i dout3 output transistor: pch, v ds = 0.5 v, v in = 5.5 v 1.71 2.76 ? ma 8 4. resx pin (S-1702axx, bxx, c xx, dxx, exx, fxx, gxx, hxx) table 10 (ta = 25c unless otherwise specified) item symbol conditions min. typ. max. unit test circuit resx pin input voltage ?h? *1 v sh2 v in = v out(s) + 1.0 v, r l = 1.0 k ? 1.2 ? ? v 4 resx pin input voltage ?l? v sl2 v in = v out(s) + 1.0 v, r l = 1.0 k ? ? ? 0.3 v 4 S-1702xxa ? 0.1 ? 0.1 a4 S-1702xxb ? 0.1 ? 0.1 a4 resx pin input current ?h? i sh2 v in = 6.5 v, v resx = 6.5 v S-1702xxc ? 0.1 ? 0.1 a4 S-1702xxa ? 0.1 ? 0.1 a4 S-1702xxb ? 0.1 ? 0.1 a4 resx pin input current ?l? i sl2 v in = 6.5 v, v resx = 0 v S-1702xxc ? 0.1 ? 0.1 a4 *1. v out(s) : specified output voltage value 5. pull-up / pull-down resistor value of on / off pin and resx pin (S-1702 xx b, xx c, xx d, xx e, xx f xx g, xx h, xx j) table 11 (ta = 25c unless otherwise specified) item symbol conditions min. typ. max. unit test circuit pull-up / pull-down resistor r pull ? ? 2.0 ? m ? 4
ultra-low current consumption 150 ma voltage regulator with built-in high-accuracy voltage detector and reset input function S-1702 series rev.1.1 _00 seiko instruments inc. 12 6. response time table 12 internal delay type (S-1702axx, bxx, cxx, dxx, exx, fxx, gxx, hxx, jxx, kxx) (ta = 25c unless otherwise specified) item symbol conditions min. typ. max. unit test circuit response time t plh1 ? ? ? 90 external delay type (S-1702lxx, mxx, nxx, pxx) item symbol conditions min. typ. max. unit test circuit response time t plh2 c d = 4.7 nf ? 30 ? ms 9
ultra-low current consumption 150 ma voltage regulator with built-in high-accuracy voltage detector and reset input function rev.1.1 _00 S-1702 series seiko instruments inc. 13 ? test circuits 1. vin vout vdout vss resx v + a + set to power on on / off a + the portion enclosed by dotted lines is not required for cmos output products. 2. vin vout vdout vss resx set to v in or gnd on / off a + the portion enclosed by dotted lines is not required for cmos out p ut p roducts. figure 6 figure 7 3. vin vout vdout vss resx v + set to v in or gnd on / off a + the portion enclosed by dotted lines is not required for cmos output products. a + vin vout vdout vss resx v + on / off the portion enclosed by dotted lines is not required for cmos output products. a + a + r l figure 8 figure 9 5. vin vout vdout vss resx v + on / off the portion enclosed by dotted lines is not required for cmos output products. r l set to power on 6. vin vout vdout vss resx (sense) on / off the portion enclosed by dotted lines is not required for cmos output products. v + figure 10 figure 11 7. vin vout vdout vss resx + on / off + v a v ds 8. vin vout vdout vss resx + on / off + v a v ds figure 12 figure 13 9. vin vout vdout vss resx (cd) on / off the portion enclosed by dotted lines is not required for cmos output products. v + figure 14
ultra-low current consumption 150 ma voltage regulator with built-in high-accuracy voltage detector and reset input function S-1702 series rev.1.1 _00 seiko instruments inc. 14 ? standard circuits 1. S-1702axx, bxx, cxx, dxx, exx, fxx, gxx, hxx vin vout vdout vss resx on / off vr output vd output gnd single gnd input c l *2 c in *1 r *3 *1. c in is a capacitor for stabilizing the input. *2. a ceramic capacitor of 1.0 *3. r is not required for a cmos output product. figure 15 2. S-1702jxx, kxx vin vout vdout vss resx (sense) on / off vr output vd output gnd single gnd input c l *2 c in *1 r *3 *1. c in is a capacitor for stabilizing the input. *2. a ceramic capacitor of 1.0 *3. r is not required for a cmos output product. figure 16 3. S-1702lxx, mxx, nxx, pxx vin vout vdout vss resx (cd) on / off vr output vd output gnd single gnd input c l *2 c in *1 r *3 *1. c in is a capacitor for stabilizing the input. *2. a ceramic capacitor of 1.0 *3. r is not required for a cmos output product. figure 17 caution the above connection diagrams and constants will not guarantee successful operation. perform thorough evaluation using the actual application to set the constants.
ultra-low current consumption 150 ma voltage regulator with built-in high-accuracy voltage detector and reset input function rev.1.1 _00 S-1702 series seiko instruments inc. 15 ? application conditions input capacitor (c in ): 1.0 f or more output capacitor (c l ): 1.0 f or more esr of output capacitor: 10 ? or less caution a general series regulator may oscillate, depending on the external components selected. check that no oscillation occurs in an application that uses the above capacitor. ? selection of vin input and vout output capacitors (c in , c l ) the S-1702 series requires an output capacitor (c l ) between the vout and vss pins for phase compensation. a ceramic capacitor with a capacitance of 1.0 f or more provides a stable operation in all temperature ranges. when using an os capacitor, tantalum capacitor, or aluminum el ectrolytic capacitor, a capacitor with a capacitance of 1.0 f or more and an esr of 10 ? or less is required. the output overshoot and undershoot values, which are trans ient response characteristics, vary depending on the output capacitor value. the required capacitance value for the input capacitor differs depending on the application. the recommended application values are c in = 1.0 f or more and c l = 1.0 f or more; however, perform thorough evaluation using the actual device, including evaluation of temperat ure characteristics.
ultra-low current consumption 150 ma voltage regulator with built-in high-accuracy voltage detector and reset input function S-1702 series rev.1.1 _00 seiko instruments inc. 16 ? explanation of terms 1. regulator block 1. 1 low dropout voltage regulator this ic?s voltage regulator has the low dropout volta ge due to its built-in transistor with low on-resistance. 1. 2 low esr a capacitor whose esr (equivalent series resistance) is low. the S-1702 series enables use of a low esr capacitor, such as a ceramic capaci tor, for the output -side capacitor (c l ). a capacitor whose esr is 10 ? 1. 3 output voltage (v out ) the accuracy of the output voltage is ensured at *1 , fixed output current, and fixed temperature. *1. differs depending on the product. caution if the above conditions change, the output voltage value may vary and exceed the accuracy range of the output voltage. please see ? ? electrical characteristics? and ? ? characteristics (typical data)? for details. 1. 4 line regulation ? ? ? ? ? ? ? ? ? out in 1 out v v v indicates the dependency of the output vo ltage on the input voltage. that is, t he values show how much the output voltage changes due to a change in the input volt age with the output current remaining unchanged. 1. 5 load regulation ( ? v out2 ) indicates the dependency of the output voltage on the ou tput current. that is, the values show how much the output voltage changes due to a change in the output current with the input voltage remaining unchanged. 1. 6 dropout voltage (v drop ) indicates the difference between the input voltage v in1 , which is the input voltage (v in ) at the point where the output voltage has fallen to 98% of the output voltage value v out3 after v in was gradually decreased from v in = v out(s) + = ?
ultra-low current consumption 150 ma voltage regulator with built-in high-accuracy voltage detector and reset input function rev.1.1 _00 S-1702 series seiko instruments inc. 17 1. 7 temperature coefficient of the output voltage ? ? ? ? ? ? ? ? ? the shaded area in figure 18 is the range where v out varies in the operating temperature range when the temperature coefficient of the output voltage is 100 ppm/c. (refer to *5 of table 7 for how to calculate the temperature change [mv/c] of the output voltage.) *1. v out(e) is the value of the output voltage measured at 25c. v out(e) *1 ? 40 25 + 0.30 mv/c v out [v] 85 ta [ c ] ? 0.30 mv/c figure 18 example of output voltage temperature characteristics (when v out = 3.0 v typ.)
ultra-low current consumption 150 ma voltage regulator with built-in high-accuracy voltage detector and reset input function S-1702 series rev.1.1 _00 seiko instruments inc. 18 2. detector block 2. 1 detection voltage ( ? v det ) the detection voltage ( ? ? ? figure 19 ). e.g. in a product with ? = ? ? ? ? remark this is the case when the regulator output voltage (v out ) is monitored by the detector. figure 19 detection voltage ( ? v det ) 2. 2 release voltage ( + v det ) the release voltage ( + + + figure 20 ). e.g. in a product with ? = + + range of release voltage v out delay time release voltage ( + + remark this is the case when the regulator output voltage (v out ) is monitored by the detector. figure 20 release voltage ( + v det )
ultra-low current consumption 150 ma voltage regulator with built-in high-accuracy voltage detector and reset input function rev.1.1 _00 S-1702 series seiko instruments inc. 19 2. 3 hysteresis width (v hys ) the hysteresis width is the difference between the detection voltage and the release voltage. setting the hysteresis width prevents malfunction caused by noise on the input voltage. the hysteresis width is internally fixed and varies depending on the product type (refer to table 2 ). 2. 4 delay time (t d ) the delay time (t d ) is a period from the input voltage flowing to the detector block has exceeded the release voltage ( + v det ), until the detector output voltage (v dout ) inverts. the internal delay type products (S-1702axx, bxx, cxx, dxx, exx, fxx, gxx, hxx, jxx, kxx) have delay time which is internally fixed. in external delay type products (s-170 2lxx, mxx, nxx, pxx), the delay time (t d ) can be changed by controlling the capacitance value of the capacitor (c d ) connected between the cd (resx) and vss pins. for how to set the delay time (t d ), refer to ?3. 2 delay circuit? in ?3. detector block? in ? ? operation? . t d v out v dout when t d = 90 s v + v det t d when t d = 30 ms t remark this is the case when the regulator output voltage (v out ) is monitored by the detector. figure 21 2. 5 through-type current this is the current that flows instantaneously when t he voltage detector detects and releases a voltage. a large through-type current flows in cmos output pr oducts (S-1702xbx, xcx, xex, xfx, xhx, xjx). a small through-type current flows in nch open drain products (S-1702xax, xdx, xgx).
ultra-low current consumption 150 ma voltage regulator with built-in high-accuracy voltage detector and reset input function S-1702 series rev.1.1 _00 seiko instruments inc. 20 2. 6 oscillation in applications where a resistor is connected to the input side ( figure 22 ), the through-type current which is generated when the detector output voltage (v dout ) goes from low to high (release) causes a voltage drop equal to through-type current figure 22 example of bad implementation of detection voltage changer 2. 7 temperature characteristics of detection voltage the shaded area in figure 23 is the range where ? *7 of table 7 for how to calculate the temperature change [m v/c] of the detection voltage.) 3.000 ? + ? ? figure 23 example of detection voltage temperature characteristics (when ? v det = 3.0 v typ.) 2. 8 temperature characteristics of release voltage the temperature change ta v det ? + ? ? ? ? ? ? ? ? + = ? + ? 2. 9 temperature characteristics of hysteresis voltage the temperature change of the hyst eresis voltage is expressed as ta v ta v det det ? ? ? ? ? + ? ? ? ? ? = ? ? ? ? ? + ?
ultra-low current consumption 150 ma voltage regulator with built-in high-accuracy voltage detector and reset input function rev.1.1 _00 S-1702 series seiko instruments inc. 21 ? operation 1. control of S-1702 series by using on / off and resx pins 1. 1 starting and stopping regulator block the regulator block can be started and stopped according to the combination of the on / off and resx pins. the regulator block switches off the output transisto r between the vin and vout pins and reduces current consumption significantly. the detector block is operating during this period, so only the amount of current cons umed by the detector block flows in the S-1702 series. 1. 2 regulator output (v out ) control: discharge shunt function *1 the regulator output (v out ) can be controlled by combining the on / off and resx pins. in the product types having a discharge shunt circuit *1 (axx, bxx, cxx, exx, fxx, gxx, jxx, lxx, nxx), this circuit forcibly sets the regulator output (v out ) the v ss level *1 . in the product types that do not have a discharge shunt circuit *1 (dxx, hxx, kxx, mxx, pxx), the regulator output (v out ) is set at the v ss level by a division resistor of several hundred of k ? between the vout and vss pins. *1. for details of a discharge shunt circuit, refer to ?2. 2. 2 discharge shunt function? in ?2. regulator block? . 1. 3 detector output voltage (v dout ) control: forcible assertion function the detector output voltage (v dout ) is forcibly asserted to the v ss level by combining the on / off and resx pins. when the forcible assertion function is not being used, the result of detection by the detector (release status: ?h?, detection status: ?l?) is output from the vdout pin.
ultra-low current consumption 150 ma voltage regulator with built-in high-accuracy voltage detector and reset input function S-1702 series rev.1.1 _00 seiko instruments inc. 22 1. 4 operation of each function acco rding to on / off and resx pins the following shows the operation of each function accordi ng to the combination of the on / off and resx pin. table 13 S-1702axx, exx on / off pin resx pin regulator block regulator output (v out ) detector output (v dout ) ?l? ?l? stops forcibly discharged v ss potential ?l? ?h? stops forcibly discharged v ss potential ?h? ?l? stops forcibly discharged v ss potential ?h? ?h? starts set value ?h? or ?l? S-1702bxx, fxx on / off pin resx pin regulator block regulator output (v out ) detector output (v dout ) ?l? ?l? stops forcibly discharged v ss potential ?l? ?h? stops forcibly discharged v ss potential ?h? ?l? starts set value v ss potential ?h? ?h? starts set value ?h? or ?l? S-1702cxx, gxx on / off pin resx pin regulator block regulator output (v out ) detector output (v dout ) ?l? ?l? stops forcibly discharged v ss potential ?l? ?h? stops not forcibly discharged ?h? or ?l? ?h? ?l? stops forcibly discharged v ss potential ?h? ?h? starts set value ?h? or ?l? S-1702dxx, hxx on / off pin resx pin regulator block regulator output (v out ) detector output (v dout ) ?l? ?l? stops not forcibly discharged v ss potential ?l? ?h? stops not forcibly discharged ?h? or ?l? ?h? ?l? starts set value v ss potential ?h? ?h? starts set value ?h? or ?l? S-1702jxx, lxx, nxx on / off pin regulator block regulator output (v out ) detector output (v dout ) ?l? stops forcibly discharged v ss potential ?h? starts set value ?h? or ?l? S-1702kxx, mxx, pxx on / off pin regulator block regulator output (v out ) detector output (v dout ) ?l? stops not forcibly discharged ?h? or ?l? ?h? starts set value ?h? or ?l?
ultra-low current consumption 150 ma voltage regulator with built-in high-accuracy voltage detector and reset input function rev.1.1 _00 S-1702 series seiko instruments inc. 23 1. 5 equivalent circuits of on / off and resx pins the on / off and resx pins are internally fixed to any one of three states; pulled-up (via a pull-up resistor), pulled-down (via a pull-down resistor), or neither pulled-up nor pulled-down (no down pull-up / pull-down resistor). for details, refer to ? table 3 input types of resx and on / off pins ?. the equivalent circuits are shown below. v ss on / off or resx v in v ss v in v in with pull-up resistor v ss on / off or resx v in v ss v in v ss with pull-down resistor v ss on / off or resx v in v ss v in without pull-up / pull-down resistor figure 24 equivalent circuits of on / off and resx pins caution in product without pull-up / pull-down resistor, do not use the on / off and resx pins in a floating state. note that applying voltage of 0.3 v to 1.2 v may increase current consumption.
ultra-low current consumption 150 ma voltage regulator with built-in high-accuracy voltage detector and reset input function S-1702 series rev.1.1 _00 seiko instruments inc. 24 2. regulator block 2. 1 basic operation the error amplifier compares the reference voltage (v ref ) with v fb , which is the output voltage resistance divided by feedback resistors r s and r f . it supplies the output transistor with the gate voltage necessary to ensure a certain output voltage free of any fluctuat ions of input voltage and temperature. the regulator output voltage (v out ) of the S-1702 series can be selected from a value between 1.5 v and 5.5 v. the block diagram of the regulator block is shown below. vout *1 *1. parasitic diode vss vin error amplifier constant current source v ref v fb v out r s r f ? + figure 25 block diagram (regulator block) 2. 2 output circuit the output circuit of the regulator block consists of an output transistor and a discharge shunt circuit. the discharge shunt function is enabled or disabled for the vout pin. refer to ?table 1 product types? for details. the equivalent circuits are shown below. vout *1 v in v ss v ss v ss v fb v ou t r s r f discharge shunt function: enabled vout *1 v in v ss v ss v ss v ss v fb v ou t r s r f discharge shunt function: disabled *1. parasitic diode figure 26 equivalent circuits of vout pin
ultra-low current consumption 150 ma voltage regulator with built-in high-accuracy voltage detector and reset input function rev.1.1 _00 S-1702 series seiko instruments inc. 25 2. 2. 1 output transistor the S-1702 series regulator block uses a low on-resista nce pch mosfet transistor as the output transistor. caution be sure that v out does not exceed v in + 2. 2. 2 discharge shunt function the discharge shunt function is enabled in the S-1702axx, bxx, cxx, exx, fxx, gx x, jxx, lxx, and nxx. when the regulator block is stopped, the output transistor is turned off and the discharge shunt circuit is turned on according to the combination of the on / off and the resx pins. this operation causes the charge in the output capacitor (c l ) to be discharged, and forcibly sets the vout pin the v ss level. the vout pin is set at the v ss level in a shorter time than the S-1702d xx, hxx, kxx, mxx, and pxx, because they disable the discharge shunt function. on / off vss output transistor: off discharge shunt circuit : on vout *1 . parasitic diode current flow gnd output capacitor S-1702 series resx *1 vin v out ? + on / off circuit v in *1 logic circuit reset circuit reference voltage circuit c l v ref v fb r s r f figure 27 discharge shunt function
ultra-low current consumption 150 ma voltage regulator with built-in high-accuracy voltage detector and reset input function S-1702 series rev.1.1 _00 seiko instruments inc. 26 3. detector block 3. 1 basic operation figure 28 shows a block diagram of the detector block. r c r b delay circuit vdout vin constant current source v ref v dout + ? figure 28 block diagram (detector block) (1) when the sense voltage (v sense ) is the release voltage ( + figure 29 ) in this case, the transistor (n 1 ) is off and the input voltage to the comparator is (r b + ? + + . (2) although the sense voltage (v sense ) drops to the release voltage ( + ? ? a in figure 29 ), the vdout pin outputs ?l? ((2) in figure 29 ). the transistor (n 1 ) is turned on and the input voltage to the comparator is r b ? r a + . (3) if the vin input voltage (v in ) further drops to the lowest operating voltage of the S-1702 series, the vdout pin is sets in high impedance. if the vdout pin is pulled up to the regulator output voltage (v out ), the vdout pin outputs v out (?h?) ((3) in figure 29 ). (4) if the vin input voltage (v in ) rises to the lowest operating voltage or more, the vdout pin outputs ?l?. although the sense voltage (v sense ) excceds the detection voltage ( ? + figure 29 ). (5) if the sense voltage (v sense ) rises to the release voltage ( + b in figure 29 ), the vdout pin outputs ?h?. the vdout pin outputs ?h? after it is delayed for t d by the delay circuit ((5) in figure 29 ). in the S-1702 series, the detection voltage (v dout ) can be set within the range of 1.3 v to 5.2 v (operating voltage range: v in = 0.8 v to 6.5 v).
ultra-low current consumption 150 ma voltage regulator with built-in high-accuracy voltage detector and reset input function rev.1.1 _00 S-1702 series seiko instruments inc. 27 a b v dd t d v ss lowest operating voltage vdout v sense (v in ) *1 v ss (1) hysteresis width (v hys ) release volta g e ( + v det ) detection voltage (?v det ) *1. when the sense pin is connected to the vin pin. (2) (3) (4) (5) figure 29 operation 3. 1. 1 regulator output voltage (v out ) detection types (S-1702axx, bxx, cxx, dxx, lxx, mxx) each detector block of S-1702axx, bxx, cxx, dxx, lxx, and mxx detects the re gulator output voltage (v out ). r c r b delay circuit vdout vin constant current source v ref v dout + ? v in cd *1 v ou t output circuit r a v ss n 1 c d vss v ss *1. S-1702lxx and S-1702mxx only figure 30 block diagram (regulator output voltage (v out ) detection type) caution if the input voltage or load current cha nges transiently, undershoot or overshoot occurs in the regulator output voltage (v out ). in the product types that the regulator output voltage is detected by the detector, if the output voltage reaches the detection voltage or less due to undershoot, the detector operates so that a reset signal may be output. to prevent this, set the value of the capacitor so that the value of undershoot is the minimum, or set the voltage range in which the difference of the output voltage and the detection voltage is undershoot or more.
ultra-low current consumption 150 ma voltage regulator with built-in high-accuracy voltage detector and reset input function S-1702 series rev.1.1 _00 seiko instruments inc. 28 3. 1. 2 input voltage (v in ) detection types (S-1702exx, fxx, gxx, hxx, nxx, pxx) each detector block of S-1702exx, fxx, gxx, hxx, nxx, and pxx dete cts the input voltage (v in ). r c r b delay circuit vdout vin constant current source v ref v dout + ? *1. S-1702nxx and S-1702pxx only cd *1 figure 31 block diagram (input voltage (v in ) detection type) 3. 1. 3 sense voltage (v sense ) detection types (S-1702jxx, kxx) each detector block of S-1702jxx and kxx detects the sense voltage (v sense ). r c r b delay circuit vdout vin constant current source v ref v dout + ? figure 32 block diagram (sense voltage (v sense ) detection type) caution use the sense pin as an input pin when detecting the external power supply voltage. if applying an input voltage (v in ) while a potential is being applied to the sense pin, an error occurs in the release voltage of the detector. apply a voltage to the sense pin after applying the input voltage (v in ).
ultra-low current consumption 150 ma voltage regulator with built-in high-accuracy voltage detector and reset input function rev.1.1 _00 S-1702 series seiko instruments inc. 29 3. 2 delay circuit 3. 2. 1 internal delay types (S-1702axx, bxx, cxx, dxx, exx, fxx, gxx, hxx, jxx, kxx) in the internal delay types, when v sense is turned on, the delay circuit makes a certain delay, after the point when v sense has reached the release voltage ( + v det ), and sets the vdout pin to output an output signal (refer to point b in figure 29 ). the delay circuit does not make delay when v sense is the detection voltage ( ? v det ) or less (refer to point a in figure 29 ). the delay time (t d ) is fixed in the internal circuit of internal delay types. 3. 2. 2 external delay types (S-1702lxx, mxx, nxx, pxx) in the external delay types, the delay time of the det ection signal can be set by connecting a capacitor (c d ) between the cd and vss pins. the delay time (t d ) is determined according to the built-in constant current, approx. 100 na (typ.), and the time constant of the external capacitor (c d ), and can be calculated by the following equation. t d [ms] = delay constant c d [nf] the delay constant (ta = 25c) is as follows. delay constant: 5.3 (min.), 6.3 (typ.), 7.3 (max.) figure 33 shows the equivalent circuit of the cd pin (external delay type). v ss cd v ss v in v in c d v ss figure 33 equivalent circuit of cd pin (external delay type) caution 1. design the board so that a current will not flow into or flow out from the cd (resx) pin, because this pin?s impedance is high. (otherwise that may provide incorrect delay time.) 2. there is no limit for the capacitance of the external capacitor (c d ) as long as the leakage current of the capacitor can be ignored against the built-in constant current value. leakage current causes deviation in delay time. when the leakage current is the built-in constant current or more, the ic does not release.
ultra-low current consumption 150 ma voltage regulator with built-in high-accuracy voltage detector and reset input function S-1702 series rev.1.1 _00 seiko instruments inc. 30 3. 3 output circuit either nch open drain output, cmos output (v out drive), or cmos output (v in drive) is used for the vdout pin. for details, refer to ?table 2 output types of vdout pin? . the equivalent circuits are shown below. vdout v ss v ss v dout nch open drain output *1 v out v ss v ss vdout v dout cmos output (v out drive) *1 v in v ss v ss vdout v dout cmos output (v in drive) *1. parasitic diode figure 34 equivalent circuits of vdout pin
ultra-low current consumption 150 ma voltage regulator with built-in high-accuracy voltage detector and reset input function rev.1.1 _00 S-1702 series seiko instruments inc. 31 4. relation of temperature coefficien ts of detector and regulator blocks the S-1702 series has a detector and a regulator in it, an d each reference voltage circuit has the same structure so that both temperature coefficients of detector detection voltage and regulator output interlock. 4. 1 positive temperature coefficient of regulator output if the temperature coefficient of regulator output is positive, so is that of detector detection voltage ( figure 35 ). 85 temperature gradient of detector ta [c] 25 ? 40 ? v det [v] temperature gradient of regulator figure 35 relation of temperature coefficients of detector and regulator (when they are positive) 4. 2 negative temperature coefficient of regulator output if the temperature coefficient of regulator output is negative, so is that of detector detection voltage ( figure 36 ). 85 ta [c] 25 ? 40 ? v det [v] temperature gradient of detecto r temperature gradient of regulator figure 36 relation of temperature coefficients of detector and regulator (when they are negative)
ultra-low current consumption 150 ma voltage regulator with built-in high-accuracy voltage detector and reset input function S-1702 series rev.1.1 _00 seiko instruments inc. 32 ? precautions ? wiring patterns for the vin, vout and gnd pins should be designed so that the impedance is low. when mounting an output capacitor between the vout and vss pins (c l ) and a capacitor for stabilizing the input between the vin and vss pins (c in ), the distance from the capacitors to these pins should be as short as possible. ? note that the output voltage may increase when a series regulator is used at low load current (1.0 ma or less). ? generally, a series regulator may cause oscillation depending on the selection of external parts. the following conditions are recommended for this ic. however, be sure to perform sufficient evaluation under the actual usage conditions for selection, including evaluation of temperature characteristics. input capacitor (c in ): 1.0 ? ? the voltage regulator may oscillate when the impedance of the power supply is high and the input capacitor is small or an input capacitor is not connected. ? the application conditions for the input voltage, output voltage, and load current should not exceed the package power dissipation. ? do not apply an electrostatic discharge to this ic that exceeds the performance ratings of the built-in electrostatic protection circuit. ? in determining the output current, attention should be paid to the output current value specified in table 7 of ? ? electrical characteristics? and footnote *8 of the table. ? sii claims no responsibility for any disputes arising out of or in connection with any infringement by products including this ic of patents owned by a third party.
ultra-low current consumption 150 ma voltage regulator with built-in high-accuracy voltage detector and reset input function rev.1.1 _00 S-1702 series seiko instruments inc. 33 ? characteristics (typical data) 1. entire circuit current consumption during operation *1 vs. input voltage (ta = 25c) v out = 1.5 v v out = 3.1 v 02 567 i ss [ a] 10 8 0 v in [v] 134 12 6 4 2 ta = 85 c ta = 25 c ta = ? 40 c 02 567 i ss [ a] 10 8 0 v in [v] 134 12 6 4 2 ta = 85 c ta = 25 c ta = ? 40 c v out = 5.5 v 02 567 i ss [ a] 10 8 0 v in [v] 134 12 6 4 2 ta = 85 c ta = 25 c ta = ? 40 c *1. excluding current flowing in pull-up and pull-down resistors connected to the on / off or resx pins
ultra-low current consumption 150 ma voltage regulator with built-in high-accuracy voltage detector and reset input function S-1702 series rev.1.1 _00 seiko instruments inc. 34 2. regulator block (1) output voltage vs. output current (when load current increases) (ta = 25c) v out = 1.5 v v out = 3.1 v

0 100 200 450 v out [v] 3.0 1.0 0 i out [ma] 300 4.0 2.0 350 400 250 150 50 v in = 3.4 v v in = 4.0 v v in = 5.0 v v in = 6.5 v 3.5 2.5 1.5 0.5 v out = 5.5 v 0 100 200 450 v out [v] 5 3 1 0 i out [ma] 6 300 4 2 350 400 250 150 50 v in = 5.8 v v in = 6.0 v v in = 6.5 v remark in determining the output current, attention should be paid to the followings. (1) the minimum output current value and footnote *8 in table 7 of ? ? electrical characteristics ?. (2) power dissipation of package (2) output voltage vs. input voltage (ta = 25c) v out = 1.5 v v out = 3.1 v 1.0 1.5 2.0 2.5 3.0 v out [v] 1.6 1.5 1.4 1.3 1.2 1.1 1.0 v in [v] 3.5 i out = ? 1 ma i out = ? 30 ma i out = ? 100 ma v out [v] 3.2 3.0 2.9 2.8 2.7 2.6 2.5 i out = ? 1 ma i out = ? 30 ma i out = ? 100 ma 2.5 3.0 3.4 4.0 4.5 v in [v] 5.0 3.1 v out = 5.5 v 4.5 5.0 5.5 6.0 v out [v] 5.6 5.3 5.1 5.0 4.8 4.7 4.5 v in [v] 6.5 4.6 4.9 5.2 5.4 5.5 i out = ? 1 ma i out = ? 30 ma i out = ? 100 ma
ultra-low current consumption 150 ma voltage regulator with built-in high-accuracy voltage detector and reset input function rev.1.1 _00 S-1702 series seiko instruments inc. 35 (3) dropout voltage vs. output current v out = 1.5 v v out = 3.1 v 0 75 150 v drop [v] 0.5 0.4 0.3 0.2 0.1 0 i out [ma] 100 50 ta = 85 c ta = 25 c ta = ? 40 c 125 25 0 75 150 v drop [v] 0.30 0.25 0.15 0.10 0.05 0 i out [ma] 100 50 125 25 0.20 ta = 85 c ta = 25 c ta = ? 40 c v out = 5.5 v 0 75 150 v drop [v] 0.25 0.15 0.10 0.05 0 i out [ma] 100 50 125 25 0.20 ta = 85 c ta = 25 c ta = ? 40 c (4) output voltage vs. ambient temperature v out = 1.5 v v out = 3.1 v ? 40 0 25 50 75 v out [v] 1.50 1.30 1.20 1.10 ta [ c] 1.40 ? 25 85 1.45 1.35 1.25 1.15 ? 40 0 25 50 75 v out [v] 3.30 3.10 3.00 2.90 ta [ c] 3.20 ? 25 85 3.25 3.15 3.05 2.95 v out = 5.5 v ? 40 0 25 50 75 v out [v] 5.70 5.50 5.40 5.30 ta [ c] 5.60 ? 25 85 5.65 5.55 5.45 5.35
ultra-low current consumption 150 ma voltage regulator with built-in high-accuracy voltage detector and reset input function S-1702 series rev.1.1 _00 seiko instruments inc. 36 (5) current consumption during operation at regulator block *1 vs. input voltage v out = 1.5 v v out = 3.1 v 02 567 i ss1 [ a] 8 0 v in [v] 134 10 6 4 2 ta = 85 c ta = 25 c ta = ? 40 c 02 567 i ss1 [ a] 8 0 v in [v] 134 10 6 4 2 ta = 85 c ta = 25 c ta = ? 40 c v out = 5.5 v 02 567 i ss1 [ a] 8 0 v in [v] 134 10 6 4 2 ta = 85 c ta = 25 c ta = ? 40 c *1. excluding current flowing in pull-up and pull-down resistors connected to the on / off or resx pins (6) ripple rejection ratio (ta = 25c) v out = 1.5 v, v in = 2.5 v, c l = 1.0 = = = 10 100 1k 10k 100k ripple rejection [db] 0 20 40 60 80 frequency [hz] 1m 100 i out = 1 ma i out = 30 ma i out = 150 ma 10 100 1k 10k 100k ripple rejection [db] 0 20 40 60 80 frequency [hz] 1m 100 i out = 1 ma i out = 30 ma i out = 150 ma v out = 5.5 v, v in = 6.0 v, c l = 1.0 10 100 1k 10k 100k ripple rejection [db] 0 20 40 60 80 frequency [hz] 1m 100 i out = 1 ma i out = 30 ma i out = 150 ma
ultra-low current consumption 150 ma voltage regulator with built-in high-accuracy voltage detector and reset input function rev.1.1 _00 S-1702 series seiko instruments inc. 37 3. detector block (1) detection voltage vs. ambient temperature ? v det = 1.3 v ? v det = 2.75 v ? 40 0 25 50 75 detection voltage [v] 1.50 1.30 1.20 1.10 ta [ c] 1.40 ? 25 85 1.45 1.35 1.25 1.15 ? v det + v det ? 40 0 25 50 75 detection voltage [v] 3.0 2.7 2.6 2.4 ta [ c] 2.9 ? 25 85 2.8 2.5 ? v det + v det ? v det = 5.2 v ? 40 0 25 50 75 detection voltage [v] 5.5 5.0 ta [ c] ? 25 85 5.4 5.3 5.2 5.1 ? v det + v det (2) hysteresis width vs. ambient temperature ? v det = 1.3 v ? v det = 2.75 v ? 40 0 25 50 75 hysteresis [%] 6 3 2 0 ta [ c] 5 ? 25 85 4 1 S-1702xax, xbx, xcx S-1702xdx, xex, xfx S-1702xgx, xhx, xjx ? 40 0 25 50 75 hysteresis [%] 6 3 2 0 ta [ c] 5 ? 25 85 4 1 S-1702xax, xbx, xcx S-1702xdx, xex, xfx S-1702xgx, xhx, xjx ? v det = 5.2 v ? 40 0 25 50 75 hysteresis [%] 6 3 2 0 ta [ c] 5 ? 25 85 4 1 S-1702xax, xbx, xcx S-1702xdx, xex, xfx S-1702xgx, xhx, xjx
ultra-low current consumption 150 ma voltage regulator with built-in high-accuracy voltage detector and reset input function S-1702 series rev.1.1 _00 seiko instruments inc. 38 (3) current consumption during operation at detector block *1 vs. input voltage ? = ? = 0 2 5 6 6.5 i ss2 [ a] 2.5 2.0 0 v in [v] 134 3.5 1.5 1.0 0.5 3.0 ta = 85 c ta = 25 c ta = ? 40 c 0 2 5 6 6.5 i ss2 [ a] 2.5 2.0 0 v in [v] 134 3.5 1.5 1.0 0.5 ta = 85 c ta = 25 c ta = ? 40 c 3.0 ? = 0 2 5 6 6.5 i ss2 [ a] 2.5 2.0 0 v in [v] 134 3.5 1.5 1.0 0.5 ta = 85 c ta = 25 c ta = ? 40 c 3.0 *1. excluding current flowing in pull-up and pull-down resistors connected to the on / off or resx pins (4) detector output voltage vs. nch transistor characteristics (i d vs. v ds characteristics) (5) detector output voltage vs. pch transistor characteristics (i d vs. v ds characteristics) (ta = 25c) (ta = 25c) 02456 i d [ma] 20 15 0 v ds [v] 13 30 10 5 25 v in = 4.0 v v in = 3.0 v v in = 2.0 v v in = 1.3 v v in = 5.0 v 02456 i d [ma] 20 15 0 v ds [v] 13 30 10 5 25 v in = 4.0 v v in = 3.0 v v in = 2.0 v v in = 1.5 v v in = 5.0 v (6) detector output voltage vs. input voltage cmos output nch open drain output 0 0.4 1.0 1.2 1.4 v dout [v] 5 4 0 v in [v] 0.2 0.6 0.8 6 3 2 1 ta = 85 c ta = 25 c ta = ? 40 c 0 0.4 1.0 1.2 1.4 v dout [v] 0.5 0.4 0 v in [v] 0.2 0.6 0.8 0.6 0.3 0.2 0.1 ta = 85 c ta = 25 c ta = ? 40 c
ultra-low current consumption 150 ma voltage regulator with built-in high-accuracy voltage detector and reset input function rev.1.1 _00 S-1702 series seiko instruments inc. 39 ? reference data 1. input transient response characteristics (ta = 25c) i out = 30 ma, tr = tf = 5.0 s, c l = 1.0 f, c in = 1.0 f v out = 1.5 v, v in = 2.5 v ? 3.5 v i out = 30 ma, tr = tf = 5.0 s, c l = 1.0 f, c in = 1.0 f v out = 3.1 v, v in = 4.1 v ? 5.1 v v out [v] 1.60 1.58 1.56 1.54 1.52 1.50 1.48 1.46 1.44 t [ s] v in [v] 4.0 3.0 2.5 2.0 0 0.5 1.0 1.5 3.5 ? 50 200 300 0 50 100 150 250 350 ? 100 v out v in v out [v] 3.35 3.30 3.25 3.20 3.15 3.10 3.05 3.00 2.95 t [ s] v in [v] 5.5 4.5 4.0 3.5 1.5 2.0 2.5 3.0 5.0 ? 50 200 300 0 50 100 150 250 350 ? 100 v out v in 2. load transient response characteristics (ta = 25c) v in = 2.5 v, c l = 1.0 f, c in = 1.0 f v out = 1.5 v, i out = 50 ma ? 100 ma v in = 4.0 v, c l = 1.0 f, c in = 1.0 f v out = 3.1 v, i out = 50 ma ? 100 ma v out [v] 1.70 1.65 1.60 1.55 1.50 1.45 1.40 1.35 t [ s] i out [ma] 150 50 0 ? 200 ? 150 ? 100 ? 50 100 ? 50 200 300 0 50 100 150 250 350 ? 100 v out i out v out [v] 3.30 3.25 3.20 3.15 3.10 3.05 3.00 2.95 t [ s] i out [ma] 150 50 0 ? 50 ? 200 ? 150 ? 100 100 ? 50 200 300 0 50 100 150 250 350 ? 100 v out i out v in = 6.0 v, c l = 1.0 f, c in = 1.0 f v out = 5.5 v, i out = 50 ma ? 100 ma v out [v] 6.40 6.20 6.00 5.80 5.60 5.40 5.20 5.00 t [ s] i out [ma] 150 50 0 ? 50 ? 200 ? 150 ? 100 100 ? 50 200 300 0 50 100 150 250 350 ? 100 v out i out
ultra-low current consumption 150 ma voltage regulator with built-in high-accuracy voltage detector and reset input function S-1702 series rev.1.1 _00 seiko instruments inc. 40 3. on/off pin transient response characteristics (ta = 25c) v in = 2.5 v, c l = 1.0 = = = = = = = = = = v out [v] 5.0 4.0 3.0 2.0 1.0 0 ? 1.0 t [ s] v on / off [v] 3.0 1.0 0 ? 3.0 ? 2.0 ? 1.0 2.0 300 400 0 100 200 500 ? 100 v out v in v out [v] 10.0 8.0 6.0 4.0 2.0 0 ? 2.0 t [ s] v on / off [v] 6.0 2.0 0 ? 6.0 ? 4.0 ? 2.0 4.0 300 400 0 100 200 500 ? 100 v out v in v in = 6.0 v, c l = 1.0 = = = = v out [v] 14.0 12.0 8.0 6.0 4.0 0 ? 2.0 t [ s] v on / off [v] 8.0 2.0 0 ? 8.0 ? 6.0 ? 2.0 4.0 300 400 0 100 200 500 ? 100 v out v in 6.0 ? 4.0 2.0 10.0

!" " # $ %& $& !
' (( !$ !$ )$ #$ ) $" *

$

+ +,
$ #$ $ ! &
$ +- .& )$& /*0 /*0 12
3$
3$ 4+5 ((+657 +4,+

3 4 8

+(3 (+
&
& & & & $& + =+57 6 ,+ ( 7 ,++5 ,;4 ?6 @ 8 7+7 ,++5 +<; ,+ (( 7 7 +( ;<7 4 ,5+( :+4( 7 ,+ ; + 7,++5 ( 7+@ 7 +(::
the information described herein is subject to change without notice. seiko instruments inc. is not responsible for any problems caused by circuits or diagrams described herein whose related industrial properties, patents, or other rights belong to third parties. the application circuit examples explain typical applications of the products, and do not guarantee the success of any specific mass-production design. when the products described herein are regulated products subject to the wassenaar arrangement or other agreements, they may not be exported without authorization from the appropriate governmental authority. use of the information described herein for other purposes and/or reproduction or copying without the express permission of seiko instruments inc. is strictly prohibited. the products described herein cannot be used as part of any device or equipment affecting the human body, such as exercise equipment, medical equipment, security systems, gas equipment, or any apparatus installed in airplanes and other vehicles, without prior written permission of seiko instruments inc. although seiko instruments inc. exerts the greatest possible effort to ensure high quality and reliability, the failure or malfunction of semiconductor products may occur. the user of these products should therefore give thorough consideration to safety design, including redundancy, fire-prevention measures, and malfunction prevention, to prevent any accidents, fires, or community damage that may ensue.

▲Up To Search▲

Price & Availability of S-1702

	To Download S-1702 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .