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tppm0125 150-ma low dropout regulator with pok slvs388 ? july 2001 1 post office box 655303 ? dallas, texas 75265 features low dropout voltage regulator, 1.2-v 150-ma load current capability power okay (pok) function load independent, low ground current,150- a current limiting thermal shutdown low sleep state current (off mode) fast transient response low variation due to load and line regulation output stable with low esr capacitors ttl logic controlled enable input applications processor powerup sequencing palmtop computers, laptops, and notebooks description the tppm0125 is a low dropout voltage regulator with an output tolerance of 2% over the operating range. the device is optimized for low noise applications and has a low quiescent current (enable <0.8 v). the device has a low dropout voltage at full load (150 ma). the power okay function monitors the output voltage and indicates when an error occurs in the system (active low). in the event of an output fault such as overcurrent, thermal shutdown, or dropout, the power okay output is pulled low (open drain). the tppm0125 has a fast transient response recovery capability in the event of load transition from heavy load to light load. the device also minimizes overshoot during this condition. during power down, the output capacitor and load are de-energized through the internal active shutdown clamp, which is turned on when the device is disabled. the tppm0125 requires a small output capacitor for stability with low esr. an input capacitor is not required unless the bulk ac capacitor is placed away from the device or the power supply is a battery. in this situation, a 1- f capacitor is recommended for the application. low esr ceramic capacitors may be used with the device to reduce board space in power applications, a key concern in hand-held wireless devices. copyright ? 2001, texas instruments incorporated please be aware that an important notice concerning availability, standard warranty, and use in critical applications of texas instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. 3 2 4 5 dbv package (top view) 1 v i gnd en v o pok production data information is current as of publication date. products conform to specifications per the terms of texas instruments standard warranty. production processing does not necessarily include testing of all parameters.
tppm0125 150-ma low dropout regulator with pok slvs388 ? july 2001 2 post office box 655303 ? dallas, texas 75265 functional block diagram enable/disable control voltage reference thermal sensor undervoltage lockout error amplifier gate drive control and current amplifier active shutdown voltage supervisor with delay timer power okay control overcurrent detection and dropout voltage detection fault fault v i en v o pok gnd terminal functions terminal i/o description name no. i/o description en 3 i enable/shutdown input (active high) gnd 2 i ground pok 4 i power okay indicator v i 1 i input supply voltage v o 5 o output voltage
tppm0125 150-ma low dropout regulator with pok slvs388 ? july 2001 3 post office box 655303 ? dallas, texas 75265 absolute maximum ratings over operating free-air temperature (unless otherwise noted) ? main input voltage range, v i (see notes 1 and 2) 0 v to 7 v . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . enable input voltage range, v (en) (see notes 1 and 2) 0 v ? v i . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . power okay output voltage range v (pok) , (see notes 1 and 2) 0 v ? v i . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . regulated output current limit, i o 400 ma . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . continuous power dissipation, p d, t a = 25 c 0.5 w . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . electrostatic discharge susceptibility, v (hbmesd) , (see note 3) 2 kv . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . junction temperature, t j , 150 c . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . storage temperature range, t stg ? 55 c to 150 c . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . lead temperature (soldering, 10 sec) 260 c . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ? stresses beyond those listed under ? absolute maximum ratings ? may cause permanent damage to the device. these are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under ? recommended operating conditions ? is not implied. exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. notes: 1. all voltage values are with respect to gnd. 2. absolute negative voltage on these terminals should not go below ? 0.5 v. 3. the human body model is a 100-pf capacitor discharged through a 1.5-k ? resistor into each terminal. devices are esd sensitive. handling precautions are recommended. recommended operating conditions min typ max unit main input voltage, v i (see notes 1 and 2) 3 5.25 v enable input voltage, v (en) (see notes 1 and 2) 0 v i v power okay voltage, v (pok) (see notes 1 and 2) 0 v i v operating ambient temperature, t a 0 70 c notes: 1. all voltage values are with respect to gnd. 2. absolute negative voltage on these terminals should not go below ? 0.5 v.
tppm0125 150-ma low dropout regulator with pok slvs388 ? july 2001 4 post office box 655303 ? dallas, texas 75265 electrical characteristics, t a = 25 c, v i =5 v, v (en) = v i , i o = 100 a, c l = 1 f(unless otherwise noted) regulator v o parameter test conditions min typ max units output voltage i o = 25 ma 1.2 v v o output voltage accuracy i o = 0 ? 1% 1% v o output voltage accuracy i o = 50 ma, t a = 0 c to 70 c (see note 4) ? 2% 2% i q quiescent supply current v (en) 0.8 v 1 a i ground terminal current (see note 5) i o = 0 150 a i (gnd) ground terminal current (see note 5) i o = 150 ma 150 a i l output load current 150 ma i (limit) output current limit v o = 0 160 300 ma ? v (lnr) line regulation v i = 3 v to 5.25 v 10 mv ? v (ldr) load regulation i o = 0.1 ma to150 ma, see note 6 2% 3% v v dropout voltage i o = 100 a 1 v v i ? v o dropout voltage i o = 150 ma 1 v c l load capacitance esr and capacitance tradeoffs 1 f i (rev) reverse output current on v i v i = gnd, v o = regulated voltage 50 a notes: 4. assured by design, not tested in production. 5. ground terminal current is the regulator quiescent current drawn from the supply to support the load current. 6. regulation is measured at constant junction temperature using low duty cycle pulse testing. devices are tested for load regul ation in the load range from 0.1 ma to 150 ma. enable input parameter test conditions min typ max units v il regulated shutdown v i = 3 v to 5.25 v regulated shutdown 0.8 v v ih regulated enabled v i = 3 v to 5.25 v regulated enabled 2 v i enable input current shutdown, v il 0.8 v 0.01 a i (en) enable input current enabled, v ih 2 v 0.01 a resistance discharge v (en) 0.8 v 500 ? thermal protection (see note 4) parameter test conditions min typ max units t (sd) thermal shutdown 165 c t (sdhys) hysteresis 15 c note 4: assured by design, not tested in production. power okay (see note 7) parameter test conditions min typ max units v (poklo) low threshold output falls % of v o (power not okay) 85% v (pokth) high threshold output reaches % of v o , starts delay timer (power okay) 90% v ol v o out of regulation fault condition, i ol = 100 a 0.4 v i lkg leakage current v i = 5 v 1 a note 7: power okay is a function of the output voltage being 5% lower than the specified range. the function is a detection of o ne of the following: over current, over temperature, or dropout.
tppm0125 150-ma low dropout regulator with pok slvs388 ? july 2001 5 post office box 655303 ? dallas, texas 75265 switching characteristics (see note 4),t a = 25 c, v i = 5 v, v (en) = v i , i o = 100 a, c l = 1 f(unless otherwise noted) parameter test conditions min typ max unit power up overshoot maximum voltage overshoot allowed on output during powerup 1% t (step) output transient time limit time for output to return within specified regulation range 5 s output transient voltage limit voltage that load step can affect the nominal output voltage 1% i (sr) load step current slew rate i l = 0.1 ma to 150 ma 10 ma/ s t r power up rise time 50 s t f power down fall time discharge resistance = 500 ? , v o < 1.08 v 60 s t d(pok) power okay delay time v i > v (pokth) until pok 2.5 ms note 4: assured by design, not tested in production. thermal resistance parameter test conditions min typ max unit r jc thermal impedance, junction-to-case 145 c/w r ja thermal impedance, junction-to-ambient 235 c/w
tppm0125 150-ma low dropout regulator with pok slvs388 ? july 2001 6 post office box 655303 ? dallas, texas 75265 parameter measurement information v (pokth) v o pok t d(pok) 90% figure 1. power okay timing during power up en v i pok delay 2.5 ms typ 85% min 90% max v o pok figure 2. power okay delay timing and output voltage supervisory
tppm0125 150-ma low dropout regulator with pok slvs388 ? july 2001 7 post office box 655303 ? dallas, texas 75265 typical characteristics v o i l figure 3. load regulation, 50-ma dynamic load step (v i = 3 v) v o i l figure 4. load regulation, 150-ma dynamic load step (v i = 3 v)
tppm0125 150-ma low dropout regulator with pok slvs388 ? july 2001 8 post office box 655303 ? dallas, texas 75265 typical characteristics v o i l figure 5. load regulation, 50-ma dynamic load step (v i = 5 v) v o i l figure 6. load regulation, 150-ma dynamic load step (v i = 5 v)
tppm0125 150-ma low dropout regulator with pok slvs388 ? july 2001 9 post office box 655303 ? dallas, texas 75265 typical characteristics v o pok en figure 7. power okay delay during power up condition v o pok figure 8. power okay delay during power down condition
tppm0125 150-ma low dropout regulator with pok slvs388 ? july 2001 10 post office box 655303 ? dallas, texas 75265 thermal information the tppm0125 is designed to provide a continuous load current of 150 ma when the maximum power dissipation of the package is not exceeded in the application. to determine the maximum power dissipation of the package, use the junction-to-ambient thermal resistance of the device. the basic equation is as follows: maximum power dissipation (w) p d(max) = (t j(max) ? t a ) / r ja (maximum power dissipation limit) where: t j(max) is the maximum junction temperature of the die (less than 150 c, minimum thermal shutdown) t a is the operating ambient temperature r ja is the thermal resistance and is layout dependent the recommended minimum footprint offers a r ja of 235 c/w. to determine the actual power dissipation of the regulator, use the following equation: p d = (v i ? v o ) i o + v i i (gnd) (watts) power dissipation resulting from quiescent current is negligible. when the power dissipation is excessive, the thermal protection circuit is triggered.
tppm0125 150-ma low dropout regulator with pok slvs388 ? july 2001 11 post office box 655303 ? dallas, texas 75265 application information 1 2 3 5 4 47 k ? shutdown enable v i gnd en v o pok optional: en may be connected to v i 1 f 1.2 v tppm0125 figure 9. typical application schematic 1 2 3 5 4 v i gnd en v o pok 1 f tppm0125 10 k ? 1 f v cc3_3 v cc1_2 figure 10. typical application for processor vid code power sequencing schematic
tppm0125 150-ma low dropout regulator with pok slvs388 ? july 2001 12 post office box 655303 ? dallas, texas 75265 mechanical data dbv (r-pdso-g5) plastic small-outline 0,10 m 0,20 0,95 0 ? 8 0,25 0,35 0,55 gage plane 0,15 nom 4073253-4/f 10/00 2,60 3,00 0,50 0,30 1,50 1,70 4 5 3 1 2,80 3,00 0,95 1,45 0,05 min seating plane notes: a. all linear dimensions are in millimeters. b. this drawing is subject to change without notice. c. body dimensions do not include mold flash or protrusion. d. falls within jedec mo-178
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