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tps79718 tps79730 tps79733 slvs332b ? march 2001 ? revised june 2001 ultralow-power sc70/sot-323 packaged 10 ma ldo linear regulators with power good output (2,15 mm x 2,3 mm) actual size 1 www.ti.com features 10-ma low-dropout regulator ultralow 1.2- a quiescent current at 10 ma 5-pin sc70/sot-323 (dck) package integrated power good output stable with any capacitor (>0.47 f) dropout voltage typically 105 mv at 10 ma (tps79733) over current limitation ?40 c to 85 c operating junction temperature range applications battery powered microcontrollers and microprocessors description the tps797xx family of low-dropout (ldo) voltage regulators offers the benefits of low-dropout voltage and ultralow-power operation. the device is stable with any capacitor ( > 0.47 f). therefore, implementations of this device require very little board space due to the miniaturized packaging and potentially small output capacitor. in addition, the family includes an integrated open drain active-high power good (pg) output. intended for use in microcontroller based, battery-powered applications, the tps797xx family?s low dropout and ultralow-powered operation results in a significant increase in system battery operating life. the small packaging minimizes consumption of board space. the device is enabled when the applied voltage exceeds the minimum input voltage. the usual pnp pass transistor has been replaced by a pmos pass element. because the pmos pass element behaves as a low-value resistor, the dropout voltage is very low, typically 105 mv at 10 ma of load current, and is directly proportional to the load current. the quiescent current is ultralow (1.2 a typically) and is stable over the entire range of output load current (0 ma to 10 ma). when properly configured with a pullup resistor, the pg output can be used to implement a power-on reset or low battery indicator. the tps797xx is offered in 1.8-v, 3-v, 3.3-v fixed options. 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. 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 dck package (top view) 1 pg gnd nc out in 0.50 0.75 1 1.25 1.50 1.75 2 ?40 ?15 10 35 60 t a ? free-air temperature ? c tps79733 ground current vs free-air temperature ground current ? a 85 v i = 4.3 v v o = 3.3 v c o = 1 f i o = 10 ma
tps79718 tps79730 tps79733 slvs332b ? march 2001 ? revised june 2001 2 www.ti.com available options ? t a voltage package part number symbol 1.8 v sc70/sot 323 tps79718dckt ? tps79718dckr atd ? 40 c to 85 c 3 v sc70/sot - 323 (dck) tps79730dckt ? TPS79730DCKR ate 3.3 v (dck) tps79733dckt ? tps79733dckr atf ? contact the factory for the availability of other voltage options between 1.25 v and 4.9 v. ? the dckt indicates tape and reel of 250 parts. the dckr indicates tape and reel of 3000 parts. absolute maximum ratings over operating free-air temperature range (unless otherwise noted) ? input voltage range ? 0.3 v to 6 v . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . maximum dc output voltage 4.9 v . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . peak output current internally limited . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . esd rating, hbm 2 kv . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . esd rating, cdm 500 v . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . continuous total power dissipation see dissipation rating table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . operating junction temperature range, t j ? 40 c to 85 c . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . operating ambient temperature range, t a ? 40 c to 85 c . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . storage temperature range, t stg ? 65 c to 150 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. note 1: all voltage values are with respect to network ground terminal. dissipation rating table board package r jc c/w r ja c/w derating factor above t a = 25 c t a 25 c power rating t a = 70 c power rating t a = 85 c power rating low k # dck 165.39 396.24 2.52 mw/ c 252mw 139 mw 101 mw high k || dck 165.39 314.74 3.18 mw/ c 318 mw 175 mw 127 mw # the jedec low k (1s) board design used to derive this data was a 3 inch x 3 inch, two layer board with 2 ounce copper traces on top of the board. || the jedec high k (2s2p) board design used to derive this data was a 3 inch x 3 inch, multilayer board with 1 ounce internal pow er and ground planes and 2 ounce copper traces on top and bottom of the board.
tps79718 tps79730 tps79733 slvs332b ? march 2001 ? revised june 2001 3 www.ti.com electrical characteristics over recommended operating free-air temperature range, v i = v o(typ) + 1 v, i o = 1 ma, c o = 1 f (unless otherwise noted) parameter test conditions min typ max unit v i in p ut voltage (see note 2) i o = 3 ma 1.8 5.5 v v i input voltage (see note 2) i o = 10 ma 2 5.5 v i o continuous output current (see note 3) 0 10 ma t j operating junction temperature, t j -40 85 c tps79718 t a = 25 c, 2.8 v < v i < 5.5 v 1.8 v tps79718 t a = ? 40 c to 85 c, 2.8 v < v i < 5.5 v 1.728 1.872 v output volta g e (10 c, 4 v < v i < 5.5 v 3.0 v g( ) (see note 4) tps79730 t a = ? 40 c to 85 c, 4 v < v i < 5.5 v 2.880 3.120 v tps79733 t a = 25 c, 4.3 v < v i < 5.5 v 3.3 v tps79733 t a = ? 40 c to 85 c, 4.3 v < v i < 5.5 v 3.168 3.432 v quiescent current (gnd current) (see note 4) t a = 25 c, 0 a < i o < 10 ma 1.2 a quiescent current (gnd current) (see note 4) t a = ? 40 c to 85 c, i o = 10 ma 2 a load regulation t a = 25 c, i o = 1 a to 10 ma 17 mv out p ut voltage line regulation ( ? v o /v o ) (see note 4) v o + 1 v < v i 5.5 v, t a = 25 c 0.15 %/v output voltage line regulation ( ? v o /v o ) (see note 4) v o + 1 v < v i 5.5 v, t a = ? 40 c to 85 c 0.8 %/v output noise voltage (tps79718) bw = 200 hz to 100 khz, c o = 10 f, i o = 10 ma, t a = 25 c 600 v rms output current limit v o = 0 v, see note 4 190 300 ma power supply ripple rejection (tps79718) f = 100 hz, c o = 10 f, i o = 10 ma, t a = 25 c 50 db tps79730 i o = 10 ma, t a = 25 c 110 dro p out voltage (see note 5) tps79730 i o = 10 ma, t a = ? 40 c to 85 c 200 mv dropout voltage (see note 5) tps79733 i o = 10 ma, t a = 25 c 105 mv tps79733 i o = 10 ma, t a = ? 40 c to 85 c 200 minimum input voltage for valid pg i o(pg) = 100 a, v (pg) 0.8 v 1.2 v pg trip threshold voltage v o decreasing 82 90 96 %v o pg output low voltage v i = 1.5 v, i o(pg) = 10 ma 0.14 0.225 v pg leakage current v (pg) = 5 v 0.1 na notes: 2. to calculate the minimum input voltage for your maximum output current, use the following formula: v i (min) = v o (max) + v do (max load) 3. continuous output current is limited by internal protection circuitry, but it is not recommended that the device operate unde r conditions beyond those specified in this table for extended periods of time. 4. the minimum in operating voltage is 1.8 v or v o (typ) + 1 v, whichever is greater. the maximum in voltage is 5.5 v. there is no minimum output current requirement and the maximum output current is 10 ma. 5. in voltage equals v o (typ) ? 100 mv; the tps79730 input voltage is set to 2.9 v and the tps79733 input voltage is set to 3.2 v. the tps79718 dropout voltage is limited by input voltage range limitations.
tps79718 tps79730 tps79733 slvs332b ? march 2001 ? revised june 2001 4 www.ti.com functional block diagram _ + delay v in current sense r1 r2 v in gnd v out pg ilim bandgap reference v ref = 1.235 v terminal functions terminal i/o description name no. i/o description gnd 2 ground nc 3 no connection out 5 o the out terminal provides the regulated output voltage of the device. pg 1 o the pg terminal for the fixed voltage option devices is an open drain, active-high output that indicates the status of v o (output of the ldo). when v o exceeds approximately 90% of the regulated voltage, pg goes to a high impedance state. it goes to a low-impedance state when v o falls below approximately 90% (i.e. overload condition) of the regulated voltage. the open drain output of the pg terminal requires a pullup resistor. in 4 i the in terminal is the power supply input to the device.
tps79718 tps79730 tps79733 slvs332b ? march 2001 ? revised june 2001 5 www.ti.com tps797xx pg timing diagram threshold voltage pg output v in v out v it ? (see note b) v min (see note a) v it + (see note b) t t t notes: a. v min = v out + v do b. the pg trip voltage is typically 10% lower than the output voltage (90%v o ). v it ? to v it+ is the hysteresis voltage.
tps79718 tps79730 tps79733 slvs332b ? march 2001 ? revised june 2001 6 www.ti.com typical characteristics 3.285 3.290 3.295 3.300 3.305 3.310 3.315 0246810 i o ? output current ? ma ? output voltage ? v v o tps79733 output voltage vs output current v i = 4.3 v c o = 1 f t a = 25 c fi g ure 1 1.785 1.790 1.795 1.800 1.805 1.810 1.815 0246810 i o ? output current ? ma ? output voltage ? v v o tps79718 output voltage vs output current v i = 2.8 v c o = 1 f t a = 25 c figure 2 3.25 3.26 3.27 3.28 3.29 3.30 3.31 3.32 3.33 3.34 3.35 ? 40 ? 15 10 35 60 85 ? output voltage ? v v o t a ? free-air temperature ? c tps79733 output voltage vs free-air temperature i o = 1 ma v i = 4.3 v c o = 1 f i o = 10 ma figure 3 1.78 1.79 1.80 1.81 1.82 ? 40 ? 15 10 35 60 85 ? output voltage ? v v o t a ? free-air temperature ? c tps79718 output voltage vs free-air temperature i o = 1 ma v i = 2.8 v c o = 1 f i o = 10 ma figure 4 0.50 0.75 1 1.25 1.50 1.75 2 ? 40 ? 15 10 35 60 t a ? free-air temperature ? c tps79733 ground current vs free-air temperature ground current ? a 85 v i = 4.3 v v o = 3.3 v c o = 1 f i o = 10 ma figure 5 0 2 4 6 8 10 100 1 k 10 k 100 k i o = 10 ma i o = 1 ma f ? frequency ? hz v i = 2.8 v v o = 1.8 v c o = 1 f tps79718 output spectral noise density vs frequency nv/ hz output spectral noise density ? figure 6 f ? frequency ? hz ? output impedance ? z o ? 0 40 25 5 35 10 15 30 v i = 4.3 v v o = 3.3 v c o = 1 f t j = 25 c i o = 1 ma 100 1 m 10 1k 10k 100k 10 m i o = 10 ma 20 output impedance vs frequency figure 7 0 20 40 60 80 100 120 140 ? 40 ? 25 ? 105 2035506580 t a ? free-air temperature ? c ? dropout voltage ? mv v do v i = 3.2 v c o = 1 f i o = 10 ma i o = 1 ma tps79733 dropout voltage vs free-air temperature figure 8 power up / power down v i v o v o = 3.3 v r l = 330 ? t ? time ? ms v o ? output voltage ? v 3 030 20 10 40 50 70 60 80 90 100 1 2 0 6 4 5 7 figure 9 v i ? input voltage ? v
tps79718 tps79730 tps79733 slvs332b ? march 2001 ? revised june 2001 7 www.ti.com typical characteristics figure 10 100 tps79718 line transient response t ? time ? s 0 300 200 100 400 500 700 600 800 900 1 k i o = 10 ma v o = 1.8 v c o = 4.7 f 50 3.8 v o ? output voltage ? mv v i ? input voltage ? v 2.8 ? 100 0 50 dv dt = 0.14 v s figure 11 t ? time ? s tps79718 load transient response ? 50 10 0 600 400 200 800 1 k 14 12 16 18 2 k current load ? ma 50 v i = 2.8 v v o = 1.8 v c o = 4.7 f 5 0 v o output voltage ? mv ? ? change in ? 100 0 100 1 ma figure 12 100 tps79733 line transient response v o t ? time ? s 0 300 200 100 400 500 700 600 800 900 1 k ? output voltage ? mv i o = 10 ma c o = 4.7 f v i ? input voltage ? v 0 5.3 4.3 ? 100 200 ? 200 dv dt = 0.14 v s figure 13 t ? time ? s tps79733 load transient response 10 5 0 ? 50 ? 100 50 ? output current ? ma i o v i = 4.3 v c o = 4.7 f 100 1 ma 0 v o output voltage ? mv ? ? change in 600 400 200 800 1 k 14 12 16 18 2 k 0
tps79718 tps79730 tps79733 slvs332b ? march 2001 ? revised june 2001 8 www.ti.com application information the tps797xx family of low-dropout (ldo) regulators have been optimized for use in micropower applications. they feature extremely low dropout voltages, and ultralow quiescent current (1.2 a typically). a typical application circuit is shown in figure 16. c1 0.1 f pg out 4 3 in nc gnd 2 1 5 v o 0.47 f + tps797xx 100 k ? + ? figure 14. typical application circuit external capacitor requirements although not required, a 0.1- f or larger input bypass capacitor, connected between in and gnd and located close to the tps797xx, is recommended, especially when a highly resistive power supply is powering the ldo in addition to other devices. like all low-dropout regulators, the tps797xx requires an output capacitor connected between out and gnd to stabilize the internal control loop. the minimum recommended capacitance is 0.47 f. any 0.47- f capacitor is suitable. capacitor values larger than 0.47 f are acceptable.
tps79718 tps79730 tps79733 slvs332b ? march 2001 ? revised june 2001 9 www.ti.com application information power dissipation and junction temperature specified regulator operation is assured to a junction temperature of 85 c; restrict the maximum junction temperature to 85 c under normal operating conditions. this restriction limits the power dissipation the regulator can handle in any given application. to ensure the junction temperature is within acceptable limits, calculate the maximum allowable dissipation, p d(max) , and the actual dissipation, p d , which must be less than or equal to p d(max) . the maximum-power-dissipation limit is determined using the following equation: p d(max) t j max t a r ja where: t j max is the maximum allowable junction temperature. r ja is the thermal resistance junction-to-ambient for the package (see power dissipation rating table). t a is the ambient temperature. the regulator dissipation is calculated using: p d v i v o i o power dissipation resulting from quiescent current is negligible. excessive power dissipation triggers the thermal protection circuit. regulator protection the tps797xx pmos-pass transistor has a built-in back diode that conducts reverse current when the input voltage drops below the output voltage (e.g., during power down). current is conducted from the output to the input and is not internally limited. if extended reverse voltage operation is anticipated, external limiting might be appropriate. the tps797xx features internal current limiting. during normal operation, the tps797xx limits output current to approximately 190 ma. when current limiting engages, the output voltage scales back linearly until the overcurrent condition ends. take care not to exceed the power dissipation ratings of the package. microcontroller application one application for which this device is particularly suited is providing a regulated input voltage and power good (pg) supervisory signal to low-power devices such as mixed-signal microcontrollers. the quiescent or ground current of the tps797xx family is typically 1.2 a even at full load; therefore, the reduction in battery life by including the tps797xx in the system is negligible. the primary benefits of using the tps797xx to power low power digital devices include: regulated output voltage that protects the device from battery droop and noise on the line (e.g., switch bounce) smooth, monotonic power up pg signal for controlled device reset potential to use an existing 5-v power rail to power a 3.3-v or lower device potential to provide separate digital and analog power and ground supplies for a system with only one power source
tps79718 tps79730 tps79733 slvs332b ? march 2001 ? revised june 2001 10 www.ti.com application information microcontroller application (continued) figure 17 shows an application in which the tps79718 is used to power ti ? s msp430 mixed signal microcontroller. tps79718 v in v out pg gnd 0.47 f 1.8 v v cc reset msp430 or equivalent v ss 0.1 f + ? figure 15. msp430 microcontroller powered by the tps79718 regulator minimal board space is needed to accommodate the dck (sc70/sot-323) packaged tps79718, the 0.1- f output capacitor, the 0.47- f input capacitor, and the pullup resistor on the pg pin.
tps79718 tps79730 tps79733 slvs332b ? march 2001 ? revised june 2001 11 www.ti.com mechanical data dck (r-pdso-g5) plastic small-outline 0,10 m 0,10 0,65 0 ? 8 0,15 0,46 0,26 gage plane 0,13 nom 4093553/b 06/99 0,15 0,30 1,40 1,10 2,30 1,90 4 5 2,15 1,85 1 3 1,10 0,80 0,10 0,00 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-203
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