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micropower low dropout voltage regulators z suffix plastic package case 29 (to226aa/to92) 2 3 18 7 6 5 2 3 4 (top view) output sense shutdown input feedback error output order this document by lp2950/d d suffix plastic package case 751 (so8) 8 1 n suffix plastic package case 626 8 1 1 pin: 1. output 2. ground 3. input v o ta p gnd dt suffix plastic package case 369a (dpak) 3 1 heatsink surface (shown as terminal 4 in case outline drawing) is connected to pin 2. 123 (top view) pin: 1. input 2. ground 3. output dm suffix plastic package case 846a (micro8) 8 1 1 motorola analog ic device data
the lp2950 and lp2951 are micropower voltage regulators that are specifically designed to maintain proper regulation with an extremely low inputtooutput voltage differential. these devices feature a very low quiescent bias current of 75 m a and are capable of supplying output currents in excess of 100 ma. internal current and thermal limiting protection is provided. the lp2951 has three additional features. the first is the error output that can be used to signal external circuitry of an out of regulation condition, or as a microprocessor poweron reset. the second feature allows the output voltage to be preset to 5.0 v, 3.3 v or 3.0 v output (depending on the version) or programmed from 1.25 v to 29 v. it consists of a pinned out resistor divider along with direct access to the error amplifier feedback input. the third feature is a shutdown input that allows a logic level signal to turnoff or turnon the regulator output. due to the low inputtooutput voltage differential and bias current specifications, these devices are ideally suited for battery powered computer, consumer, and industrial equipment where an extension of useful battery life is desirable. the lp2950 is available in the three pin case 29 and dpak packages, and the lp2951 is available in the eight pin dualinline, so8 and micro8 surface mount packages. the `a' suffix devices feature an initial output voltage tolerance 0.5%. lp2950 and lp2951 features: ? low quiescent bias current of 75 m a ? low inputtooutput voltage differential of 50 mv at 100 m a and 380 mv at 100 ma ? 5.0 v, 3.3 v or 3.0 v 0.5% allows use as a regulator or reference ? extremely tight line and load regulation ? requires only a 1.0 m f output capacitor for stability ? internal current and thermal limiting lp2951 additional features: ? error output signals an out of regulation condition ? output programmable from 1.25 v to 29 v ? logic level shutdown input (see following page for ordering information.) ? motorola, inc. 1996 rev 4
lp2950 lp2951 2 motorola analog ic device data ordering information device type operating temperature range package lp2950cz** lp2950acz** fixed voltage t40 125 c to92/to226aa LP2950CDT ** fixed voltage ( 3.0, 3.3 or 5.0 v ) t40 125 c dpak LP2950CDT ** lp2950acdt ** (3 . 0 , 3 . 3 or 5 . 0 v) t40 125 c dpak lp2950acdt ** t40 125 c dpak lp2951cd lp2951acd adjustable or 5.0 v fixed t40 125 c so 8 lp2951cd ** adjustable or fixed t40 125 c so8 lp2951cd ** lp2951acd ** adjustable or fixed (3 0 3 3 v) t40 125 c lp2951acd ** (3 . 0 , 3 . 3 v) t j = 40 to +125 c lp2951cn lp2951acn adjustable or 5.0 v fixed t j = 40 t o + 125 c plastic lp2951cn ** adjustable or fixed plastic lp2951cn ** lp2951acn ** adjustable or fixed (3 0 3 3 v) lp2951acn ** (3 . 0 , 3 . 3 v) lp2951cdm lp2951acdm adjustable or 5.0 v fixed micro 8 lp2951cdm ** adjustable or fixed micro8 lp2951cdm ** lp2951acdm ** adjustable or fixed (3 0 3 3 v) lp2951acdm ** (3 . 0 , 3 . 3 v) ** = voltage option of 3.0, 3.3 or 5.0 v. device type/nominal output voltage device no. ( 1%) device no. ( 0.5%) nominal voltage lp2950cx5.0 lp2950acx5.0 5.0 lp2950cx3.3 lp2950acx3.3 3.3 lp2950cx3.0 lp2950acx3.0 3.0 lp2951cx lp2951acx adjustable or 5.0 lp2950cx3.3 lp2951acx3.3 adjustable or 3.3 lp2951cx3.0 lp2951acx3.0 adjustable or 3.0 x = package suffix. from cmos/ttl 3 representative block diagrams this device contains 34 active transistors. lp2950cz5.0 battery or unregulated dc gnd 2 output 5.0 v/100 ma 1 input 3 1.23 v reference error amplifier 182 k 60 k 1.0 m f gnd 4 182 k 60 k 1.23 v reference 1.0 m f lp2951cd or cn error amplifier battery or unregulated dc shutdown error output 5 v o ta p feedback 6 7 input 8 output 1 sense 2 5.0 v/100 ma 330 k to cmos/ttl 75 mv/ 60 mv error detection comparator 50 k 60 k
lp2950 lp2951 3 motorola analog ic device data maximum ratings (t a = 25 c, unless otherwise noted.) rating symbol value unit input voltage v cc 30 vdc power dissipation and thermal characteristics maximum power dissipation p d internally limited w case 751(so8) d suffix thermal resistance, junctiontoambient r q ja 180 c/w thermal resistance, junctiontocase r q jc 45 c/w case 369a (dpak) dt suffix [note 1] thermal resistance, junctiontoambient r q ja 92 c/w thermal resistance, junctiontocase r q jc 6.0 c/w case 29 (to226aa/to92) z suffix thermal resistance, junctiontoambient r q ja 160 c/w thermal resistance, junctiontocase r q jc 83 c/w case 626 n suffix thermal resistance, junctiontoambient r q ja 105 c/w case 846a (micro8) dm suffix thermal resistance, junctiontoambient r q ja 240 c/w feedback input voltage v fb 1.5 to +30 vdc shutdown input voltage v sd 0.3 to +30 vdc error comparator output voltage v err 0.3 to +30 vdc operating junction temperature t j 40 to +125 c storage temperature range t stg 65 to +150 c note: 1. the junctiontoambient thermal resistance is determined by pc board copper area per figure 26. 2. esd data available upon request. electrical characteristics (v in = v o + 1.0 v, i o = 100 m a, c o = 1.0 m f, t j = 25 c [note 1], unless otherwise noted.) characteristic symbol min typ max unit output voltage, 5.0 v versions v o v v in = 6.0 v, i o = 100 m a, t j = 25 c lp2950c5.0/lp2951c 4.950 5.000 5.050 lp2950ac5.0/lp2951ac 4.975 5.000 5.025 t j = 40 to +125 c lp2950c5.0/lp2951c 4.900 5.100 lp2950ac5.0/lp2951ac 4.940 5.060 v in = 6.0 to 30 v, i o = 100 m a to 100 ma, t j = 40 to +125 c lp2950c5.0/lp2951c 4.880 5.120 lp2950ac5.0/lp2951ac 4.925 5.075 output voltage, 3.3 v versions v o v v in = 4.3 v, i o = 100 m a, t j = 25 c lp2950c3.3/lp2951c3.3 3.267 3.300 3.333 lp2950ac3.3/lp2951ac3.3 3.284 3.300 3.317 t j = 40 to +125 c lp2950c3.3/lp2951c3.3 3.234 3.366 lp2950ac3.3/lp2951ac3.3 3.260 3.340 v in = 4.3 to 30 v, i o = 100 m a to 100 ma, t j = 40 to +125 c lp2950c3.3/lp2951c3.3 3.221 3.379 lp2950ac3.3/lp2951ac3.3 3.254 3.346 output voltage, 3.0 v versions v o v v in = 4.0 v, i o = 100 m a, t j = 25 c lp2950c3.0/lp2951c3.0 2.970 3.000 3.030 lp2950ac3.0/lp2951ac3.0 2.985 3.000 3.015 t j = 40 to +125 c lp2950c3.0/lp2951c3.0 2.940 3.060 lp2950ac3.0/lp2951ac3.0 2.964 3.036 v in = 4.0 to 30 v, i o = 100 m a to 100 ma, t j = 40 to +125 c lp2950c3.0/lp2951c3.0 2.928 3.072 lp2950ac3.0/lp2951ac3.0 2.958 3.042
lp2950 lp2951 4 motorola analog ic device data electrical characteristics (continued) (v in = v o + 1.0 v, i o = 100 m a, c o = 1.0 m f, t j = 25 c [note 1], unless otherwise noted.) characteristic unit max typ min symbol line regulation (v in = v o(nom) +1.0 v to 30 v) [note 2] reg line % lp2950cxx/lp2951c/lp2951cxx 0.08 0.20 lp2950acxx/lp2951ac/lp2951acxx 0.04 0.10 load regulation (i o = 100 m a to 100 ma) reg load % lp2950cxx/lp2951c/lp2951cxx 0.13 0.20 lp2950acxx/lp2951ac/lp2951acxx 0.05 0.10 dropout voltage v i v o mv i o = 100 m a 30 80 i o = 100 ma 350 450 supply bias current i cc i o = 100 m a 93 120 m a i o = 100 ma 4.0 12 ma dropout supply bias current (v in = v o(nom) 0.5 v, i o = 100 m a) [note 2] i ccdropout 110 170 m a current limit (v o shorted to ground) i limit 220 300 ma thermal regulation reg thermal 0.05 0.20 %/w output noise voltage (10 hz to 100 khz) [note 3] v n m vrms c l = 1.0 m f 126 c l = 100 m f 56 lp2951a/lp2951ac only reference voltage (t j = 25 c) v ref v lp2951c/lp2951cxx 1.210 1.235 1.260 lp2951ac/lp2951acxx 1.220 1.235 1.250 reference voltage (t j = 40 to +125 c) v ref v lp2951c/lp2951cxx 1.200 1.270 lp2951ac/lp2951acxx 1.200 1.260 reference voltage (t j = 40 to +125 c) v ref v i o = 100 m a to 100 ma, v in = 23 to 30 v lp2951c/lp2951cxx 1.185 1.285 lp2951ac/lp2951acxx 1.190 1.270 feedback pin bias current i fb 15 40 na error comparator output leakage current (v oh = 30 v) i lkg 0.01 1.0 m a output low voltage (v in = 4.5 v, i ol = 400 m a) v ol 150 250 mv upper threshold voltage (v in = 6.0 v) v thu 40 45 mv lower threshold voltage (v in = 6.0 v) v thl 60 95 mv hysteresis (v in = 6.0 v) v hy 15 mv shutdown input input logic voltage v shtdn v logic a0o (regulator aono) 0 0.7 logic a1o (regulator aoffo) 2.0 30 shutdown pin input current i shtdn m a v shtdn = 2.4 v 35 50 v shtdn = 30 v 450 600 regulator output current in shutdown mode i off 3.0 10 m a (v in = 30 v, v shtdn = 2.0 v, v o = 0, pin 6 connected to pin 7) notes: 1. low duty pulse techniques are used during test to maintain junction temperature as close to ambient as possible. 2. v o(nom) is the part number voltage option. 3 . noise tests on the lp2951 are made with a 0.01 m f capacitor connected across pins 7 and 1.
lp2950 lp2951 5 motorola analog ic device data definitions dropout voltage the input/output voltage differential at which the regulator output no longer maintains regulation against further reductions in input voltage. measured when the output drops 100 mv below its nominal value (which is measured at 1.0 v differential), dropout voltage is affected by junction temperature, load current and minimum input supply requirements. line regulation the change in output voltage for a change in input voltage. the measurement is made under conditions of low dissipation or by using pulse techniques such that average chip temperature is not significantly affected. load regulation the change in output voltage for a change in load current at constant chip temperature. maximum power dissipation the maximum total device dissipation for which the regulator will operate within specifications. bias current current which is used to operate the regulator chip and is not delivered to the load. output noise voltage the rms ac voltage at the output, with constant load and no input ripple, measured over a specified frequency range. leakage current current drawn through a bipolar transistor collectorbase junction, under a specified collector voltage, when the transistor is aoffo. upper threshold voltage voltage applied to the comparator input terminal, below the reference voltage which is applied to the other comparator input terminal, which causes the comparator output to change state from a logic a0o to a1o. lower threshold voltage voltage applied to the comparator input terminal, below the reference voltage which is applied to the other comparator input terminal, which causes the comparator output to change state from a logic a1o to a0o. hysteresis the difference between lower threshold voltage and upper threshold voltage. figure 1. quiescent current , output voltage (v) v out , output voltage (v) v out 50 5.00 0 6.0 0 250 0.1 10 t a , ambient temperature ( c) v in , input voltage (v) bias current ( a) m v in , input voltage (v) lp2950/lp2951 bias current (ma) i l , load current (ma) figure 2. dropout characteristics figure 3. input current figure 4. output voltage versus temperature 1.0 10 100 1.0 2.0 3.0 4.0 5.0 6.0 5.0 10 15 20 25 0 50 100 150 1.0 0.1 0.01 5.0 4.0 3.0 2.0 1.0 0 4.99 4.98 4.97 4.96 4.95 200 150 100 50 0 r l = 50 k r l = 50 w 0.1 ma load current no load lp2951c t a = 25 c lp2951c
lp2950 lp2951 6 motorola analog ic device data r l dropout voltage (mv) = 50 t, temperature ( c) 0 200 0 8.0 50 550 100 7.0 4.70 5.0 0.1 400 load current (ma) t, time (ms) , input voltage (v) t, time ( m s) shutdown and output voltage (v) t, time ( m s) , output voltage (v) v in , input voltage (v) dropout voltage (mv) figure 5. dropout voltage versus output current i o , output current (ma) figure 6. dropout voltage versus temperature figure 7. error comparator output figure 8. line transient response figure 9. lp2951 enable transient figure 10. load transient response 1.0 10 100 0 50 100 150 4.74 4.78 4.82 4.86 100 200 300 4.90 400 500 600 700 800 0 100 200 300 400 400 250 50 150 200 300 350 100 300 200 0 500 450 400 300 7.5 7.0 6.5 6.0 5.5 4.0 3.0 1.0 0 5.0 3.0 1.0 1.0 150 100 0 50 50 r l = 50 v in decreasing v in increasing v in v out r l = 50 k t a = 25 c c l = 1.0 m f i l = 1.0 ma v o = 5.0 v c l = 1.0 m f v out = 5.0 v t a = 25 c v out i load t a = 25 c i l = 10 ma v in = 8.0 v v out = 5.0 v c l = 10 m f shutdown input 350 r l dropout voltage (mv) = 50 k 55 50 45 40 30 35 350 250 150 100 2.0 output voltage change (mv) 4.0 2.0 0 2.0 6.0 4.0 output voltage change (mv) 0 200 200 400 400 6.0 4.0 2.0 0 50 v in v out c l = 1.0 m f t a = 25 c lp2951c r l = 330 k t a = 25 c
lp2950 lp2951 7 motorola analog ic device data 0 100 100 4.0 40 1.8 1.0 80 v out , output current (ma) v in , input voltage (v) voltage noise ( v/ hz) f, frequency (hz) shutdown threshold voltage (v) t, temperature ( c) ripple rejection (db) figure 11. ripple rejection f, frequency (hz) figure 12. output noise figure 13. shutdown threshold voltage versus temperature figure 14. maximum rated output current t a = 25 c c l = 1.0 m f v in = 6.0 v v out = 5.0 v c l = 1.0 m f m c l = 100 m f i l = 0.1 ma i l = 100 ma t a = 25 c v o = 5.0 v lp2951c output aoffo output aono t a = 25 c lp2951cn 60 40 20 0 3.0 2.0 1.0 0 80 60 40 20 0 1.4 1.0 0.8 1.2 1.6 10 100 1.0 k 10 k 100 k 1.0 k 10 k 100 k 20 40 80 120 160 5.0 15 25 35 40 10 20 30 60 100 140 20 0 t a = 75 c 4.0 2.0 0 2.0 4.0 6.0 output voltage change ( mv )
lp2950 lp2951 8 motorola analog ic device data applications information introduction the lp2950/lp2951 regulators are designed with internal current limiting and thermal shutdown making them userfriendly. typical application circuits for the lp2950 and lp2951 are shown in figures 17 through 25. these regulators are not internally compensated and thus require a 1.0 m f (or greater) capacitance between the lp2950/lp2951 output terminal and ground for stability. most types of aluminum, tantalum or multilayer ceramic will perform adequately. solid tantalums or appropriate multilayer ceramic capacitors are recommended for operation below 25 c. at lower values of output current, less output capacitance is required for output stability. the capacitor can be reduced to 0.33 m f for currents less than 10 ma, or 0.1 m f for currents below 1.0 ma. using the 8pin versions at voltages less than 5.0 v operates the error amplifier at lower values of gain, so that more output capacitance is needed for stability. for the worst case operating condition of a 100 ma load at 1.23 v output (output pin 1 connected to the feedback pin 7) a minimum capacitance of 3.3 m f is recommended. the lp2950 will remain stable and in regulation when operated with no output load. when setting the output voltage of the lp2951 with external resistors, the resistance values should be chosen to draw a minimum of 1.0 m a. a bypass capacitor is recommended across the lp2950/lp2951 input to ground if more than 4 inches of wire connects the input to either a battery or power supply filter capacitor. input capacitance at the lp2951 feedback pin 7 can create a pole, causing instability if high value external resistors are used to set the output voltage. adding a 100 pf capacitor between the output pin 1 and the feedback pin 7 and increasing the output filter capacitor to at least 3.3 m f will stabilize the feedback loop. error detection comparator the comparator switches to a positive logic low whenever the lp2951 output voltage falls more than approximately 5.0% out of regulation. this value is the comparator's designedin offset voltage of 60 mv divided by the 1.235 v internal reference. as shown in the representative block diagram. this trip level remains 5.0% below normal regardless of the value of regulated output voltage. for example, the error flag trip level is 4.75 v for a normal 5.0 v regulated output, or 9.50 v for a 10 v output voltage. figure 1 is a timing diagram which shows the error signal and the regulated output voltage as the input voltage to the lp2951 is ramped up and down. the error signal becomes valid (low) at about 1.3 v input. it goes high when the input reaches about 5.0 v (v out exceeds about 4.75 v). since the lp2951's dropout voltage is dependent upon the load current (refer to the curve in the typical performance characteristics), the input voltage trip point will vary with load current. the output voltage trip point does not vary with load. the error comparator output is an open collector which requires an external pullup resistor. this resistor may be returned to the output or some other voltage within the system. the resistance value should be chosen to be consistent with the 400 m a sink capability of the error comparator. a value between 100 k and 1.0 m w is suggested. no pullup resistance is required if this output is unused. when operated in the shutdown mode, the error comparator output will go high if it has been pulled up to an external supply. to avoid this invalid response, the error comparator output should be pulled up to v out (see figure 15). figure 15. error output timing 5.0 v 4.75 v 4.70 v 4.75 v + v dropout 4.70 v + v dropout 1.3 v 1.3 v not valid pullup to v out pullup to ext output voltage error input voltage not valid programming the output voltage (lp2951) the lp2951cx may be pinstrapped for 5.0 v using its internal voltage divider by tying pin 1 (output) to pin 2 (sense) and pin 7 (feedback) to pin 6 (5.0 v tap). alternatively, it may be programmed for any output voltage between its 1.235 reference voltage and its 30 v maximum rating. an external pair of resistors is required, as shown in figure 16. figure 16. adjustable regulator error output shutdown input v in v out 1.23 to 30 v 3.3 m f 0.01 m f nc nc r 2 r1 100 k 5 3 error sd gnd fb 47 6 v o t sns 2 v out v in 8 1 the complete equation for the output voltage is: v out ref ( 1 r1 r2 ) i fb r1 where v ref is the nominal 1.235 v reference voltage and i fb is the feedback pin bias current, nominally 20 na. the minimum recommended load current of 1.0 m a forces an upper limit of 1.2 m w on the value of r2, if the regulator must work with no load. i fb will produce a 2% typical error in v out which may be eliminated at room temperature by adjusting r1. for better accuracy, choosing r2 = 100 k reduces this
lp2950 lp2951 9 motorola analog ic device data error to 0.17% while increasing the resistor program current to 12 m a. since the lp2951 typically draws 75 m a at no load with pin 2 open circuited, the extra 12 m a of current drawn is often a worthwhile tradeoff for eliminating the need to set output voltage in test. output noise in many applications it is desirable to reduce the noise present at the output. reducing the regulator bandwidth by increasing the size of the output capacitor is the only method for reducing noise on the 3 lead lp2950. however, increasing the capacitor from 1.0 m f to 220 m f only decreases the noise from 430 m v to 160 m vrms for a 100 khz bandwidth at the 5.0 v output. noise can be reduced fourfold by a bypass capacitor across r1, since it reduces the high frequency gain from 4 to unity. pick c bypass 1 2 r1 x 200 hz or about 0.01 m f. when doing this, the output capacitor must be increased to 3.3 m f to maintain stability. these changes reduce the output noise from 430 m v to 126 m vrms for a 100 khz bandwidth at 5.0 v output. with bypass capacitor added, noise no longer scales with output voltage so that improvements are more dramatic at higher output voltages. figure 17. 1.0 a regulator with 1.2 v dropout 0.01 m f 10 k mtb23p06e 1.0 m f unregulated input error output shutdown input v out 5.0 v 1.0% 0 to 1.0 a 220 m f 2.0 k 5 3 error sd gnd fb 47 6 v o t sns 2 v out v in 8 1 0.002 m f 1.0 m lp2951cn
lp2950 lp2951 10 motorola analog ic device data typical applications figure 18. lithium ion battery cell charger 1n4001 gnd 4.2 v 0.025 v nc nc 50 k 5 3 error sd gnd fb 47 6 v o t sns 2 v out v in 8 1 0.1 m f nc lp2951cn 2.2 m f 330 pf 806 k 1.0% 2.0 m 1.0% lithium ion rechargeable cell unregulated input 6.0 to 10 vdc figure 19. low drift current sink error output shutdown input +v = 2.0 to 30 v 1.0 m f r 5 3 error sd gnd fb 47 6 v o t sns 2 v out v in 8 1 0.1 m f load i l = 1.23/r i l figure 20. latch off when error flag occurs reset +v in v out 1.0 m f nc nc r2 r1 470 k 5 3 error sd gnd fb 47 6 v o t sns 2 v out v in 8 1 lp2951cn 470 k error flag occurs when v in is too low to maintain v out , or if v out is reduced by excessive load current. normally closed 2n3906 figure 21. 5.0 v regulator with 2.5 v sleep function *sleep input +v in v out 3.3 m f nc nc 100 k 100 k 470 k 5 3 error sd gnd fb 47 6 v o t sns 2 v out v in 8 1 lp2951cn 200 k 100 pf 2n3906 47 k cmos gate error output shutdown input lp2951cn
lp2950 lp2951 11 motorola analog ic device data 330 k figure 22. regulator with early warning and auxiliary output +v in memory v+ 1.0 m f 20 5 3 error sd gnd fb 47 6 v o t sns 2 v out v in 8 1 lp2951cn #1 1.0 m f 5 3 error sd gnd fb 47 6 v o t sns 2 v out v in 8 1 lp2951cn #2 nc reset v dd m p early warning all diodes are 1n4148. early warning flag on low input voltage. main output latches off at lower input voltages. battery backup on auxiliary output. operation: regulator #1's v out is programmed one diode drop above 5.0 v. its error flag becomes active when v in < 5.7 v. when v in drops below 5.3 v, the error flag of regulator #2 becomes active and via q1 latches the main output aoffo. when v in again exceeds 5.7 v, regulator #1 is back in regulation and the early warning signal rises, unlatching regulator #2 via d3. d4 2.7 m q1 2n3906 d2 d1 d3 27 k 3.6 v nicad main output figure 23. 2.0 a low dropout regulator +v in v out @ 2.0 a 100 m f nc nc r2 r1 470 5 3 error sd gnd fb 47 6 v o t sns 2 v out v in 8 1 lp2951cn mje2955 4.7 m error flag v out = 1.25v (1.0 + r1/r2) for 5.0 v output, use internal resistors. wire pin 6 to 7, and wire pin 2 to +v out bus. 20 k 47 4.7 m f tant 0.05 680 0.033 m f 2n3906 10 k current limit section 220 1000 m f .33 m f .01 m f 2n3906
lp2950 lp2951 12 motorola analog ic device data figure 24. open circuit detector for 4.0 to 20 ma current loop 5 3 error sd gnd fb 47 6 v o t sns 2 v out v in 8 1 lp2951cn nc output* 0.1 m f nc nc nc 1n457 1n457 360 1n457 1n4001 24 + 5.0 v 4.7 k 15 20 ma 4 * high for i l < 3.5 ma figure 25. low battery disconnect 2n3906 5 3 error sd gnd fb 47 6 v o t sns 2 v out v in 8 1 lp2951cn nc 1.0 m f nc 2 3 1 20 main v+ memory v+ 6.0 v leadacid battery nicad backup battery 100 k 31.6 k mc34164p5 nc r , thermal resistance ja q junction-to-air ( c/w) 40 50 60 70 80 90 100 0 0.4 0.8 1.2 1.6 2.0 2.4 0102030 25 15 5.0 l, length of copper (mm) p d(max) for t a = 50 c minimum size pad p d l l ??? ??? ??? ??? , maximum power dissipation (w) free air mounted vertically r q ja 2.0 oz. copper figure 26. dpak thermal resistance and maximum power dissipation versus p.c.b. copper length
lp2950 lp2951 13 motorola analog ic device data z suffix plastic package case 2904 (to226aa/to92) issue ad outline dimensions dt suffix plastic package case 369a13 (dpak) issue y notes: 1. dimensioning and tolerancing per ansi y14.5m, 1982. 2. controlling dimension: inch. 3. contour of package beyond dimension r is uncontrolled. 4. dimension f applies between p and l. dimension d and j apply between l and k minimum. lead dimension is uncontrolled in p and beyond dimension k minimum. r a p j l f b k g h section xx c v d n n xx seating plane dim min max min max millimeters inches a 0.175 0.205 4.45 5.20 b 0.170 0.210 4.32 5.33 c 0.125 0.165 3.18 4.19 d 0.016 0.022 0.41 0.55 f 0.016 0.019 0.41 0.48 g 0.045 0.055 1.15 1.39 h 0.095 0.105 2.42 2.66 j 0.015 0.020 0.39 0.50 k 0.500 12.70 l 0.250 6.35 n 0.080 0.105 2.04 2.66 p 0.100 2.54 r 0.115 2.93 v 0.135 3.43 1 d a k b r v s f l g 2 pl m 0.13 (0.005) t e c u j h t seating plane z dim min max min max millimeters inches a 0.235 0.250 5.97 6.35 b 0.250 0.265 6.35 6.73 c 0.086 0.094 2.19 2.38 d 0.027 0.035 0.69 0.88 e 0.033 0.040 0.84 1.01 f 0.037 0.047 0.94 1.19 g 0.180 bsc 4.58 bsc h 0.034 0.040 0.87 1.01 j 0.018 0.023 0.46 0.58 k 0.102 0.114 2.60 2.89 l 0.090 bsc 2.29 bsc r 0.175 0.215 4.45 5.46 s 0.020 0.050 0.51 1.27 u 0.020 0.51 v 0.030 0.050 0.77 1.27 z 0.138 3.51 notes: 1. dimensioning and tolerancing per ansi y14.5m, 1982. 2. controlling dimension: inch. 123 4
lp2950 lp2951 14 motorola analog ic device data n suffix plastic package case 62605 issue k outline dimensions d suffix plastic package case 75105 (so8) issue r notes: 1. dimension l to center of lead when formed parallel. 2. package contour optional (round or square corners). 3. dimensioning and tolerancing per ansi y14.5m, 1982. min min max max millimeters inches dim 9.40 6.10 3.94 0.38 1.02 0.76 0.20 2.92 0.76 10.16 6.60 4.45 0.51 1.78 1.27 0.30 3.43 0.370 0.240 0.155 0.015 0.040 0.030 0.008 0.115 0.030 0.400 0.260 0.175 0.020 0.070 0.050 0.012 0.135 10 1.01 2.54 bsc 7.62 bsc 0.100 bsc 0.300 bsc a b c d f g h j k l m n 10 0.040 f h g d n c k m j l note 2 1 4 5 8 t 0.13 (0.005) ab m m m a b t seating plane seating plane 1 4 5 8 a 0.25 m cb ss 0.25 m b m h c x 45 l dim min max millimeters a 1.35 1.75 a1 0.10 0.25 b 0.35 0.49 c 0.18 0.25 d 4.80 5.00 e 1.27 bsc e 3.80 4.00 h 5.80 6.20 h 0 7 l 0.40 1.25 0.25 0.50 notes: 1. dimensioning and tolerancing per asme y14.5m, 1994. 2. dimensions are in millimeters. 3. dimension d and e do not include mold protrusion. 4. maximum mold protrusion 0.15 per side. 5. dimension b does not include mold protrusion. allowable dambar protrusion shall be 0.127 total in excess of the b dimension at maximum material condition. d e h a b e b a1 c a 0.10
lp2950 lp2951 15 motorola analog ic device data dm suffix plastic package case 846a02 (micro8) issue c outline dimensions s b m 0.08 (0.003) a s t dim min max min max inches millimeters a 2.90 3.10 0.114 0.122 b 2.90 3.10 0.114 0.122 c 1.10 0.043 d 0.25 0.40 0.010 0.016 g 0.65 bsc 0.026 bsc h 0.05 0.15 0.002 0.006 j 0.13 0.23 0.005 0.009 k 4.75 5.05 0.187 0.199 l 0.40 0.70 0.016 0.028 notes: 1. dimensioning and tolerancing per ansi y14.5m, 1982. 2. controlling dimension: millimeter. 3. dimension a does not include mold flash, protrusions or gate burrs. mold flash, protrusions or gate burrs shall not exceed 0.15 (0.006) per side. 4. dimension b does not include interlead flash or protrusion. interlead flash or protrusion shall not exceed 0.25 (0.010) per side. b a d k g pin 1 id 8 pl 0.038 (0.0015) t seating plane c h j l
lp2950 lp2951 16 motorola analog ic device data motorola reserves the right to make changes without further notice to any products herein. motorola makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does motorola assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation consequential or incidental damages. atypicalo parameters which may be provided in motorola data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. all operating parameters, including atypicalso must be validated for each customer application by customer's technical experts. motorola does not convey any license under its patent rights nor the rights of others. motorola products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the motorola product could create a situation where personal injury or death may occur. should buyer purchase or use motorola products for any such unintended or unauthorized application, buyer shall indemnify and hold motorola and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that motorola was negligent regarding the design or manufacture of the part. motorola and are registered trademarks of motorola, inc. motorola, inc. is an equal opportunity/affirmative action employer. how to reach us: usa / europe / locations not listed : motorola literature distribution; japan : nippon motorola ltd.; tatsumispdjldc, 6f seibubutsuryucenter, p.o. box 20912; phoenix, arizona 85036. 18004412447 or 6023035454 3142 tatsumi kotoku, tokyo 135, japan. 038135218315 mfax : rmfax0@email.sps.mot.com touchtone 6 022446609 asia / pacific : motorola semiconductors h.k. ltd.; 8b tai ping industrial park, internet : http://designnet.com 51 ting kok r oad, tai po, n.t., hong kong. 85226629298 lp2950/d ?

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