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rev. 1.10 1 february 18, 2016 rev. 1.00 pb february 18, 2016 ht75xx-7 30v, 100ma tinypower tm ldo with protections features ? low power consumption ? low voltage drop ? low temperature coeffcient ? high input voltage C up to 30v ? output voltage accuracy: tolerance 2% ? over current protection ? over temperature protection ? chip enable/disable function ? package types: t o92-3, sot89-3, and sot23-5 applications ? battery-powered equipment ? communication equipment ? audio/video equipment general description the ht75xx-7 is a low power high voltage series of regulators implemented in cmos technology which has t he a dvantages of l ow vol tage drop a nd l ow quiescent current. they allow input voltages as high as 30v and are available with several fixed output voltages ranging from 2.1v to 12.0v. when the ce input is low , a fast dischar ge path pulls the output voltage low via an internal pull-down resistor. a n internal over -current protection circuit prevents the device from damage even if the output is shorted to ground. an over -temperature protection circuit ensures the device junction temperature will not exceed a temperature of 160c. selection table part no. output voltage packages markings ht7521-7 2.1v to92-3 sot89-3 sot23-5 75xx-7 marking for the to92-3, sot89-3 types 5xx7 for the sot23-5 type ht7523-7 2.3v HT7525-7 2.5v ht7527-7 2.7v ht7530-7 3.0v ht7533-7 3.3v ht7536-7 3.6v ht7540-7 4.0v ht7544-7 4.4v ht7550-7 5.0v ht7560-7 6.0v ht7570-7 7.0v ht7580-7 8.0v ht7590-7 9.0v ht75a0-7 10.0v ht75c0-7 12.0v note: "xx" stands for output voltages.
rev. 1.10 2 february 18, 2016 ht75xx-7 block diagram vref otp ocp soft start vin ce gnd out en 300 ? en pin assignment gnd vin out 1 23 75xx-7 sot89-3 5xx7 1 23 4 5 vin gnd ce out nc sot23-5 to92-3 75xx-7 gnd vin out 123 pin descriptions pin no. pin name pin description to92-3 sot89-3 sot23-5 1 1 2 gnd ground pin 2 2 1 vin input pin 3 3 5 out output pin 3 ce chip enable pin, high enable 4 nc no connection
rev. 1.10 3 february 18, 2016 ht75xx-7 absolute maximum ratings parameter value unit v in -0.3 to +33 v v ce -0.3 to (v in +0.3) v operating temperature range, ta -40 to +85 o c maximum junction temperature, t j(max) +150 o c storage temperature range -65 to +165 o c junction-to-ambient thermal resistance, ja to92-3 200 c/w sot89-3 200 c/w sot23-5 500 c/w power dissipation, p d to92-3 0.50 w sot89-3 0.50 w sot23-5 0.20 w note: p d is measured at t a = 25c. recommended operating range parameter value unit v in 3.1 to 30 v v ce 0 to v in v electrical characteristics v in =v out +2v, v ce =v in , ta=+25 o c and c in =c out =10f, unless otherwise specifed symbol parameter test conditions min. typ. max. unit v in input voltage 30 v v out output voltage range 2.1 12.0 v v o output voltage accuracy i out =10ma C2 2 % i out output current v out < 5.0v 100 ma v out 5.0v 150 ma ?v out load regulation 1ma i out 50ma 15 45 mv v dif dropout voltage i out =1ma, v out change=2% (note) 10 30 mv i ss1 quiescent current i out =0ma 2.5 4.0 a i ss2 v ce =2.0v, v in =30v, i out =0ma 3.0 5.0 a i shd shutdown current v ce =0v 0.1 0.5 a ?v out ?v in ?v out line regulation (v out +1v) v in 30v, i out =1ma v out 5v 0.1 0.2 %/v v out 6v 0.2 0.4 %/v ?v out ?t a ?v out temperature coeffcient i out =10ma, -40c < ta < 85c 100 ppm/c i short output short current v in =12v, force v out =0v 150 ma t shd shutdown temperature 160 o c t rec recovery temperature 25 o c v ih enable high threshold ce pin, v out +1v v in 30v 2.0 v v il enable low threshold ce pin, v out +1v v in 30v 0.6 v r dis discharge resistor ce=0v, measure at v out 300 ? note: the dropout voltage is defned as the input voltage minus the output voltage that produces a 2% change in the output voltage from the value at v in =v out +2v with a fxed load.
rev. 1.10 4 february 18, 2016 ht75xx-7 typical performance characteristic test condition: v in =v out +2v, v ce =v in , i out =10ma, c in =10f, c out =10f and t a=25oc, unless otherwise noted. 3.27 3.28 3.29 3.3 3.31 3.32 3.33 3.34 4 7 10 13 16 19 22 25 28 31 v in (v) v out (v) - 40c 25c 85c 4.9 4.92 4.94 4.96 4.98 5 5.02 5.04 5.06 5 8 11 14 17 20 23 26 29 v in (v) v out (v) - 40c 25c 85c line regulation: ht7533-7 (i out =10ma) line regulation: ht7550-7 (i out =10ma) 5.9 5.92 5.94 5.96 5.98 6 6.02 6.04 6.06 6 9 12 15 18 21 24 27 30 v in (v) v out (v) - 40c 25c 85c 11.8 11.85 11.9 11.95 12 12.05 12.1 12.15 12 15 18 21 24 27 30 v in (v) v out (v) - 40c 25c 85c line regulation: ht7560-7 (i out =10ma) line regulation: ht75c0-7 (i out =10ma) 0 0.5 1 1.5 2 2.5 3 3.5 4 5 8 11 14 17 20 23 26 29 32 v in (v) i ss (ua) - 40c 25c 85c 0 0.5 1 1.5 2 2.5 3 3.5 4 5 8 11 14 17 20 23 26 29 32 v in (v) i ss (ua) - 40c 25c 85c i ss vs v in : ht7533-7 (i out =0ma) i ss vs v in : ht7550-7 (i out =0ma) 0 0.5 1 1.5 2 2.5 3 3.5 4 6 9 12 15 18 21 24 27 30 v in (v) i ss (ua) - 40c 25c 85c 0 0.5 1 1.5 2 2.5 3 3.5 4 12 15 18 21 24 27 30 v in (v) i ss (ua) - 40c 25c 85c i ss vs v in : ht7560-7 (i out =0ma) i ss vs v in : ht75c0-7 (i out =0ma)
rev. 1.10 5 february 18, 2016 ht75xx-7 test condition: v in =v out +2v, v ce =v in , i out =10ma, c in =10f, c out =10f and t a=25oc, unless otherwise noted. 0 0.1 0.2 0.3 0.4 0.5 4 7 10 13 16 19 22 25 28 31 v in (v) i shd (ua) - 40c 25c 85c 0 0.1 0.2 0.3 0.4 0.5 5 8 11 14 17 20 23 26 29 32 v in (v) i shd (ua) - 40c 25c 85c i shd vs v in : ht7533-7 (i out =0ma) i shd vs v in : ht7533-7 (i out =0ma) 0 0.1 0.2 0.3 0.4 0.5 4 7 10 13 16 19 22 25 28 31 v in (v) i shd (ua) - 40c 25c 85c 0 0.1 0.2 0.3 0.4 0.5 12 15 18 21 24 27 30 v in (v) i shd (ua) - 40c 25c 85c i shd vs v in : ht7560-7 (i out =0ma) i shd vs v in : ht75c0-7 (i out =0ma) 0 50 100 150 200 250 0 10 20 30 40 50 60 70 80 90 100 110 i out (ma) i ss (ua) - 40c 25c 85c 0 50 100 150 200 250 300 350 400 450 0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 i out (ma) i ss (ua) - 40c 25c 85c i ss vs i out : ht7533-7 (v in =5.3v) i ss vs i out : ht7550-7 (v in =7.0v) 0 50 100 150 200 250 300 350 400 450 500 550 600 0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 i out (ma) i ss (ua) - 40c 25c 85c 0 50 100 150 200 250 300 350 400 450 500 550 600 650 0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 i out (ma) i ss (ua) - 40c 25c 85c i ss vs i out : ht7560-7 (v in =8.0v) i ss vs i out : ht75c0-7 (v in =14v)
rev. 1.10 6 february 18, 2016 ht75xx-7 test condition: v in =v out +2v, v ce =v in , i out =10ma, c in =10f, c out =10f and t a=25oc, unless otherwise noted. 0 0.5 1 1.5 2 2.5 3 3.5 2.5 5.5 8.5 11.5 14.5 17.5 20.5 23.5 26.5 29.5 v ce (v) i ss (ua) - 40c 25c 85c 0 0.5 1 1.5 2 2.5 3 3.5 2.5 5.5 8.5 11.5 14.5 17.5 20.5 23.5 26.5 29.5 v ce (v) i ss (ua) - 40c 25c 85c i ss vs v ce : ht7533-7 (i out =0ma) i ss vs v ce : ht7550-7 (i out =0ma) 0 0.5 1 1.5 2 2.5 3 3.5 2.5 5.5 8.5 11.5 14.5 17.5 20.5 23.5 26.5 29.5 v ce (v) i ss (ua) - 40c 25c 85c 0 0.5 1 1.5 2 2.5 3 3.5 2.5 5.5 8.5 11.5 14.5 17.5 20.5 23.5 26.5 29.5 v ce (v) i ss (ua) - 40c 25c 85c i ss vs v ce : ht7560-7 (i out =0ma) i ss vs v ce : ht75c0-7 (i out =0ma) 0 50 100 150 200 250 4 7 10 13 16 19 22 25 28 31 v in (v) i shd (ma) - 40 c 25 c 85 c 0 20 40 60 80 100 120 140 160 180 5 7 9 11 13 15 17 19 21 23 25 27 29 31 v in (v) temperature (c) tshd(+) tshd(-) i shd vs v in t shd vs v in
rev. 1.10 7 february 18, 2016 ht75xx-7 test condition: v in =v out +2v, v ce =v in , i out =10ma, c in =10f, c out =10f and t a=25oc, unless otherwise noted. 0 200 400 600 800 1000 1200 1400 0 10 20 30 40 50 60 70 80 90 100 i out (ma) v dif (mv) - 40c 25c 85c 0 200 400 600 800 1000 1200 1400 1600 0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 i out (ma) v dif (mv) - 40c 25c 85c dropout voltage: ht7533-7 dropout voltage: ht7550-7 0 200 400 600 800 1000 1200 1400 1600 0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 i out (ma) v dif (mv) - 40c 25c 85c 0 200 400 600 800 1000 1200 1400 1600 1800 0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 i out (ma) v dif (mv) - 40c 25c 85c dropout voltage: ht7560-7 dropout voltage: ht75c0-7
rev. 1.10 8 february 18, 2016 ht75xx-7 test condition: v in =v out +2v, v ce =v in , i out =10ma, c in =10f, c out =10f and t a=25oc, unless otherwise noted. load transient response: ht7533-7 (v in =5.3v, i out =0ma to 40ma) load transient response: ht7550-7 (v in =7v, i out =0ma to 40ma) load transient response: ht7533-7 (v in =5.3v, i out =40ma to 0ma) load transient response: ht7550-7 (v in =7.0v, i out =40ma to 0ma) load transient response: ht7560-7 (v in =8.0v, i out =0ma to 40ma) load transient response: ht75c0-7 (v in =14v, i out =0ma to 40ma) load transient response: ht7560-7 (v in =8.0v, i out =40ma to 0ma) load transient response: ht75c0-7 (v in =14v, i out =40ma to 0ma)
rev. 1.10 9 february 18, 2016 ht75xx-7 test condition: v in =v out +2v, v ce =v in , i out =10ma, c in =10f, c out =10f and t a=25oc, unless otherwise noted. line transient response: ht7533-7 (i out =10ma) line transient response: ht7550-7 (i out =10ma) line transient response: ht7533-7 (i out =10ma) line transient response: ht7550-7 (i out =10ma) line transient response: ht7560-7 (i out =10ma) line transient response: ht75c0-7 (i out =10ma) line transient response: ht7560-7 (i out =10ma) line transient response: ht75c0-7 (i out =10ma)
rev. 1.10 10 february 18, 2016 ht75xx-7 test condition: v in =v out +2v, v ce =v in , i out =10ma, c in =10f, c out =10f and t a=25oc, unless otherwise noted. line transient response: ht7533-7 (i out =10ma) line transient response: ht7550-7 (i out =10ma) line transient response: ht7533-7 (i out =10ma) line transient response: ht7550-7 (i out =10ma) line transient response: ht7560-7 (i out =10ma) line transient response: ht75c0-7 (i out =10ma) line transient response: ht7560-7 (i out =10ma) line transient response: ht75c0-7 (i out =10ma)
rev. 1.10 11 february 18, 2016 ht75xx-7 test condition: v in =v out +2v, v ce =v in , i out =10ma, c in =10f, c out =10f and t a=25oc, unless otherwise noted. on/off response: ht7533-7 (i out =0ma, v ce =0v to 2.7v) on/off response: ht7550-7 (i out =0ma, v ce =0v to 2.7v) on/off response: ht7533-7 (i out =0ma, v ce =2.7v to 0v) on/off response: ht7550-7 (i out =0ma, v ce =2.7v to 0v) on/off response: ht7560-7 (i out =0ma, v ce =0v to 2.7v) on/off response: ht75c0-7 (i out =0ma, v ce =0v to 2.7v) on/off response: ht7560-7 (i out =0ma, v ce =2.7v to 0v) on/off response: ht75c0-7 (i out =0ma, v ce =2.7v to 0v)
rev. 1.10 12 february 18, 2016 ht75xx-7 test condition: v in =v out +2v, v ce =v in , i out =10ma, c in =10f, c out =10f and t a=25oc, unless otherwise noted. on/off response: ht7533-7 (i out =100ma, v ce =0v to 2.7v) on/off response: ht7550-7 (i out =150ma, v ce =0v to 2.7v) on/off response: ht7533-7 (i out =100ma, v ce =2.7v to 0v) on/off response: ht7550-7 (i out =150ma, v ce =2.7v to 0v) on/off response: ht7560-7 (i out =150ma, v ce =0v to 2.7v) on/off response: ht75c0-7 (i out =150ma, v ce =0v to 2.7v) on/off response: ht7560-7 (i out =150ma, v ce =2.7v to 0v) on/off response: ht75c0-7 (i out =150ma, v ce =2.7v to 0v)
rev. 1.10 13 february 18, 2016 ht75xx-7 test condition: v in =v out +2v, v ce =v in , i out =10ma, c in =10f, c out =10f and t a=25oc, unless otherwise noted. power on response: ht7533-7 (i out =0ma, t rise =0.1ms) power on response: ht7550-7 (i out =0ma, t rise =0.1ms) power off response: ht7533-7 (i out =0ma, t fall =0.1ms) power off response: ht7550-7 (i out =0ma, t fall =0.1ms) power on response: ht7560-7 (i out =0ma, t rise =0.1ms) power on response: ht75c0-7 (i out =0ma, t rise =0.1ms) power off response: ht7560-7 (i out =0ma, t fall =0.1ms) power off response: ht75c0-7 (i out =0ma, t fall =0.1ms)
rev. 1.10 14 february 18, 2016 ht75xx-7 test condition: v in =v out +2v, v ce =v in , i out =10ma, c in =10f, c out =10f and t a=25oc, unless otherwise noted. power on response: ht7533-7 (i out =0ma, t rise =100ms) power on response: ht7550-7 (i out =0ma, t rise =100ms) power off response: ht7533-7 (i out =0ma, t fall =100ms) power off response: ht7550-7 (i out =0ma, t fall =100ms) power on response: ht7560-7 (i out =0ma, t rise =100ms) power on response: ht75c0-7 (i out =0ma, t rise =100ms) power off response: ht7560-7 (i out =0ma, t fall =100ms) power off response: ht75c0-7 (i out =0ma, t fall =100ms)
rev. 1.10 15 february 18, 2016 ht75xx-7 test condition: v in =v out +2v, v ce =v in , i out =10ma, c in =10f, c out =10f and t a=25oc, unless otherwise noted. power on response: ht7533-7 (i out =100ma, t rise =0.1ms) power on response: ht7550-7 (i out =150ma, t rise =0.1ms) power off response: ht7533-7 (i out =100ma, t fall =0.1ms) power off response: ht7550-7 (i out =150ma, t fall =0.1ms) power on response: ht7560-7 (i out =150ma, t rise =0.1ms) power on response: ht75c0-7 (i out =150ma, t rise =0.1ms) power off response: ht7560-7 (i out =150ma, t fall =0.1ms) power off response: ht75c0-7 (i out =150ma, t fall =0.1ms)
rev. 1.10 16 february 18, 2016 ht75xx-7 test condition: v in =v out +2v, v ce =v in , i out =10ma, c in =10f, c out =10f and t a=25oc, unless otherwise noted. power on response: ht7533-7 (i out =100ma, t rise =100ms) power on response: ht7550-7 (i out =150ma, t rise =100ms) power off response: ht7533-7 (i out =100ma, t fall =100ms) power off response: ht7550-7 (i out =150ma, t fall =100ms) power on response: ht7560-7 (i out =150ma, t rise =100ms) power on response: ht75c0-7 (i out =150ma, t rise =100ms) power off response: ht7560-7 (i out =150ma, t fall =100ms) power off response: ht75c0-7 (i out =150ma, t fall =100ms)
rev. 1.10 17 february 18, 2016 ht75xx-7 application information when usi ng the ht75xx-7 regulators, it is im portant that t he f ollowing a pplication p oints a re n oted i f correct operation is to be achieved. external circuit it is important that external capacitors are connected to both t he i nput a nd out put pi ns. for t he i nput pi n suitable bypass capacitors as shown in the application circuits should be connec ted espe cially i n si tuations where a battery power source is used which may have a higher impedance. for the output pin, a suitable capacitor should a lso be c onnected e specially i n situations where the load is of a transient nature, in which case lar ger capacitor values should be selected to limit any output transient voltages. thermal considerations the maximum pow er dis sipation depends on the thermal res istance of the package, the p cb layout, the rate of the surrounding airfow and the dif ference between the junction and ambient temperature. the maximum power dissipation can be calculated using the following formula: p d(max) = (t j(max) C t a ) / ja where t j(max) is the m aximum junct ion te mperature, t a is the ambient temperature and ja is the junction- to-ambient thermal res istance of the ic package in degrees per watt. the following table shows the ja values for various package types. package ja value c/w sot89-3 200c/w to92-3 200c/w sot23-5 500c/w for m aximum ope rating ra ting c onditions, t he maximum junction temperature is 150c. however , it is recommended that the maximum junction temperature does not exceed 125c during normal operation to maintain an adequate mar gin for device reliability. the derat ing curves of dif ferent packages for maximum power dissipation are as follows: 25 50 75 100 125 150 0 0.2 0.4 0.6 0.8 0 ambient temperature ( o c) maximum power dissipation (w) 0.2w (sot23-5) 0.5w (sot89-3, to92-3) power dissipation calculation in order to keep the device within its operating limits and to maintain a regulated output voltage, the power dissipation of t he de vice, gi ven by p d , m ust not exceed t he ma ximum power di ssipation, gi ven by p d(max) . t herefore p d p d(max) . fr om t he d iagram i t can be seen that almost all of this power is generated across the pass transistor which is acting like a variable resistor in series with the load to keep the output voltage constant. this generated power which will appear as heat, must never allow the device to exceed its maximum junction temperature. in pra ctical a pplications t he re gulator m ay be c alled upon to provide both s teady s tate and trans ient currents d ue t o t he t ransient n ature o f t he l oad. although t he de vice m ay be worki ng we ll wi thin i ts limits with its steady state current, care must be taken with transient loads which may cause the current to rise close to its maximum current value. care must be taken with transient loads and currents as this will result in device junction temperature rises which must not exceed the maximum junction temperature. w ith both steady state and transient currents, the important current to consider is the average or more precisely the rms current which is the value of current that will appear as heat generated in the device. the following diagram shows how the average current relates to the transient currents. time i load i load(avg)
rev. 1.10 18 february 18, 2016 ht75xx-7 as the quiescent current of the device is very small it can generally be ignored and as a result the input current can be assumed to be equal to the output current. therefore the power dissipation of the device, p d , can be calculated as the voltage drop across the input and output multiplied by the current, given by the equation, p d = (v in C v out ) i in . as the input current is also equal to the load current the power dissipati on p d = (v in C v out ) i load . however, with transient load currents, p d = (v in C v out ) i load(avg) as shown in the fgure. vref vin gnd out vfb v in common v out i in common i load ce application circuits basic circuits ht75xx-7 series v in 10 f 0.1 f v in common v out 10 f 0.1 f v out common c3 c1 c2 c4 gnd ce off on high output current positive voltage regulator ht75xx-7 series v in 10 f 0.1 f v in common v out 10 f 0.1 f v out common c3 c1 c2 c4 tr1 r1 gnd ce off on
rev. 1.10 19 february 18, 2016 ht75xx-7 circuit for increasing output voltage ce off on ht75xx-7 series v in 10 f 0.1 f v in v out 10 f 0.1 f v out c3 c1 c2 c4 v xx common common r1 r2 i ss v out = v xx (1+r2/r1) + i ss r2 gnd circuit for increasing output voltage ce off on ht75xx-7 series v in 10 f 0.1 f v in v out 10 f 0.1 f v out c3 c1 c2 c4 v xx common common r1 d1 i ss v out = v xx + v d1 gnd constant current regulator ce off on ht75xx-7 series v in 10 f 0.1 f v in v out 10 f 0.1 f v out c3 c1 c2 c4 v xx common common ra rl i ss i out = v xx / ra + i ss i out gnd
rev. 1.10 20 february 18, 2016 ht75xx-7 dual supply ce off on ht75xx-7 series v in 10 f 0.1 f v in v out 10 f 0.1 f v out c3 c1 c5 c6 common d1 gnd r1 v out ht75xx-7 series v in v out gnd 10 f c2 0.1 f c4 common ce off on
rev. 1.10 21 february 18, 2016 ht75xx-7 package information note that the package information provided here is for consultation purposes only. as this information may be updated at regular intervals users are reminded to consult the holtek website for the latest version of the package/ carton information . additional supplementary information with regard to packaging is listed below. click on the relevant section to be transferred to the relevant website page. ? package information (include outline dimensions, product tape and reel specifcations) ? the operation instruction of packing materials ? carton information
rev. 1.10 22 february 18, 2016 ht75xx-7 3-pin sot89-3 outline dimensions symbol dimensions in inch min. nom. max. a 0.173 0.181 b 0.053 0.072 c 0.090 0.102 d 0.035 0.047 e 0.155 0.167 f 0.014 0.019 g 0.017 0.022 h 0.059 bsc i 0.055 0.063 j 0.014 0.017 symbol dimensions in mm min. nom. max. a 4.40 4.60 b 1.35 1.83 c 2.29 2.60 d 0.89 1.20 e 3.94 4.25 f 0.36 0.48 g 0.44 0.56 h 1.50 bsc i 1.40 1.60 j 0.35 0.44
rev. 1.10 23 february 18, 2016 ht75xx-7 3-pin to92-3 outline dimensions symbol dimensions in inch min. nom. max. a 0.173 0.180 0.205 b 0.170 0.210 c 0.500 0.580 d 0.015 bsc e 0.010 bsc f 0.050 bsc g 0.035 bsc h 0.125 0.142 0.165 symbol dimensions in mm min. nom. max. a 4.39 4.57 5.21 b 4.32 5.33 c 12.70 14.73 d 0.38 bsc e 2.54 bsc f 1.27 bsc g 0.89 bsc h 3.18 3.61 4.19
rev. 1.10 24 february 18, 2016 ht75xx-7 5-pin sot23-5 outline dimensions h symbol dimensions in inch min. nom. max. a 0.057 a1 0.006 a2 0.035 0.045 0.051 b 0.012 0.020 c 0.003 0.009 d 0.114 bsc e 0.063 bsc e 0.037 bsc e1 0.075 bsc h 0.110 bsc l1 0.024 bsc 0 8 symbol dimensions in mm min. nom. max. a 1.45 a1 0.15 a2 0.90 1.15 1.30 b 0.30 0.50 c 0.08 0.22 d 2.90 bsc e 1.60 bsc e 0.95 bsc e1 1.90 bsc h 2.80 bsc l1 0.60 bsc 0 8
rev. 1.10 25 february 18, 2016 ht75xx-7 copyright ? 2016 by holtek semiconductor inc. the information appearing in this data sheet is believed to be accurate at the time of publication. however, holtek assumes no responsibility arising from the use of the specifcations described. the applications mentioned herein are used solely for the purpose of illustration and holtek makes no warranty or representation that such applications will be suitable without further modification, nor recommends the use of its products for application that may present a risk to human life due to malfunction or otherwise. holtek's products are not authorized for use as critical components in life support devices or systems. holtek reserves the right to alter its products without prior notifcation. for the most up-to-date information, please visit our web site at http://www.holtek.com.tw.

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