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5 v, 3 a logic controlled high-side power switch ADP197 rev. 0 information furnished by analog devices is believed to be accurate and reliable. however, no responsibility is assumed by analog devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. specifications subject to change without notice. no license is granted by implication or otherwise under any patent or patent rights of analog devices. trademarks and registered trademarks are the property of their respective owners. one technology way, p.o. box 9106, norwood, ma 02062-9106, u.s.a. tel: 781.329.4700 www.analog.com fax: 781.461.3113 ?2011 analog devices, inc. all rights reserved. features low rds on of 12 m low input voltage range: 1.8 v to 5.5 v 3 a continuous operating current at 70c 1.2 v logic compatible enable input low 18 a quiescent current, v in < 3 v low 30 a quiescent current, v in = 5 v overtemperature protection ultralow shutdown current: <1 a ultrasmall 1.0 mm 1.5 mm, 6-ball, 0.5 mm pitch wlcsp applications mobile phones digital cameras and audio devices portable and battery-powered equipment typical applications circuit gnd en load v in v out ADP197 charge pump and slew rate control off on 09298-001 + ? overtemperature protection figure 1. general description the ADP197 is a high-side load switch designed for operation between 1.8 v and 5.5 v. this load switch provides power domain isolation, helping extended power domain isolation. the device contains a low on-resistance, n-channel mosfet that supports more than 3 a of continuous current and minimizes power loss. the low 18 a quiescent current and ultralow shutdown current make the ADP197 ideal for battery-operated portable equipment. the built-in level shifter for enable logic makes the ADP197 compatible with many processors and gpio controllers. overtemperature protection circuitry activates if the junction temperature exceeds 125c, thereby protecting itself and downstream circuits from potential damage. in addition to operating performance, the ADP197 occupies minimal printed circuit board (pcb) space with an area of less than 1.5 mm 2 and a height of 0.60 mm. the ADP197 is available in an ultrasmall, 1 mm 1.5 mm, 6-ball, 0.5 mm pitch wlcsp. www..net
ADP197 rev. 0 | page 2 of 16 table of contents features .............................................................................................. 1 applications....................................................................................... 1 typical applications circuit............................................................ 1 general description ......................................................................... 1 revision history ............................................................................... 2 specifications..................................................................................... 3 timing diagram ........................................................................... 3 absolute maximum ratings............................................................ 4 esd caution.................................................................................. 4 pin configuration and function descriptions............................. 5 typical performance characteristics ..............................................6 theory of operation ...................................................................... 10 applications information .............................................................. 11 capacitor selection .................................................................... 11 ground current.......................................................................... 11 enable feature ............................................................................ 11 timing ......................................................................................... 11 outline dimensions ....................................................................... 13 ordering guide .......................................................................... 13 revision history 3/11revision 0: initial version
ADP197 rev. 0 | page 3 of 16 specifications v in = 1.8 v, v en = v in , i out = 1 a, t a = 25c, unless otherwise noted. table 1. parameter symbol test conditions/comments min typ max unit input voltage range v in t j = ?40c to +85c 1.8 5.5 v en input en input v ih v in = 1.8 v to 5.5 v 1.2 v v il v in = 1.8 v to 5.5 v 0.4 v en input pull-down current i en v in = 1.8 v 500 na current ground current i gnd v in = 1.8 v 18 a v in = 3.4 v 14 a v in = 4.2 v, t j = ?40c to +85c 18 30 a v in = 5.5 v 28 a off state current i off v en = gnd, v out = 0 v, v in = 4.2 v 0.1 a v en = gnd, t j = ?40c to +85c, v out = 0 v, v in = 1.8 v to 5.5 v 20 a continuous operating current 1 i out v in = 1.8 v to 5.5 v 3 a vin to vout resistance rds on v in = 5.5 v 0.012 v in = 4.2 v 0.012 v in = 1.8 v 0.012 v in = 1.8 v, t j = ?40c to +85c 0.012 0.017 v out turn-on delay time see figure 2 turn-on delay time t on_dly v in = 1.8 v to 5.5 v, c load = 1 f 1 ms thermal shutdown thermal shutdown threshold ts sd t j rising 125 c thermal shutdown hysteresis ts sd-hys 15 c 1 at an ambient temperature of 85c, the part can withstand a continuous current of 2.22 a. at a load current of 3 a, the operat ional lifetime derates to 2190 hours. timing diagram v en v out turn-on rise 90% 10% turn-off delay turn-off fall turn-on delay 09298-002 figure 2. timing diagram
ADP197 rev. 0 | page 4 of 16 absolute maximum ratings table 2. parameter rating vin to gnd ?0.3 v to +6.5 v vout to gnd ?0.3 v to v in en to gnd ?0.3 v to v in continuous drain current t a = 25c 4 a t a = 85c 2.22 a continuous diode current ?50 ma storage temperature range ?65c to +150c operating junction temperature range ?40c to +105c soldering conditions jedec j-std-020 stresses above those listed under absolute maximum ratings may cause permanent damage to the device. this is a stress rating only; functional operation of the device at these or any other conditions above those indicated in the operational section of this specification is not implied. exposure to absolute maximum rating conditions for extended periods may affect device reliability. table 3. typical ja and jb values package type ja jb unit 6-ball, 0.5 mm pitch wlcsp 260 58 c/w esd caution
ADP197 rev. 0 | page 5 of 16 pin configuration and fu nction descriptions vin vout 12 vin a b vout en c gnd top view (not to scale) ADP197 09298-003 figure 3. pin configuration table 4. pin function descriptions pin no. mnemonic description a1, b1 vin input voltage. a2, b2 vout output voltage. c1 en enable input. drive en high to turn on the switch and drive en low to turn off the switch. c2 gnd ground.
ADP197 rev. 0 | page 6 of 16 typical performance characteristics v in = 1.8 v, v en = v in , c in = c out = 1 f, t a = 25c, unless otherwise noted. 0.016 0.014 0.012 0.010 0.008 0.006 0.004 0.002 0 rds on ( ? ) ?40?30?20?100 102030405060708090 temperature (c) 1.8v 3.4v 4.2v 5.5v 09298-004 figure 4. rds on vs. temperature, 500 ma 0.016 0.014 0.012 0.010 0.008 0.006 0.004 0.002 0 rds on ( ? ) ?40 ?30 ?20 ?10 0 10 20 30 40 50 60 70 80 90 temperature (c) 1.8v 3.4v 4.2v 5.5v 09298-005 figure 5. rds on vs. temperature, 3 a, different input voltages (v in ) 0 0.005 0.010 0.015 0.020 0.025 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 rds on ( ? ) v in (v) 50ma 100ma 200ma 500ma 1000ma 3000ma 09298-006 figure 6. rds on vs. input voltage (v in ), different load currents 0 0.005 0.010 0.015 0.020 0.025 0.030 0.035 0.040 0.045 0.050 ?40 ?5 25 65 85 difference (v) temperature (c) 09298-007 50ma 100ma 200ma 500ma 1000ma 3000ma figure 7. voltage drop vs. temperature, different load currents 0 5 10 15 20 25 30 35 40 45 50 ?40?5256585 ground current (a) temperature (c) 09298-016 100ma 200ma 500ma 1000ma 3000ma figure 8. ground current vs. temperature, different load currents, v in = 1.8 v 0 5 10 15 20 25 30 35 40 45 50 ground current (a) ?40 ?5 25 65 85 temperature (c) 09298-017 100ma 200ma 500ma 1000ma 3000ma figure 9. ground current vs. temperature, different load currents, v in = 4.2 v
ADP197 rev. 0 | page 7 of 16 0 5 10 15 20 25 30 35 40 45 50 ?40 ?5 25 65 85 ground current (a) temperature (c) 09298-018 100ma 200ma 500ma 1000ma 3000ma figure 10. ground current vs. temperature, different load currents, v in = 5.5 v 0 5 10 15 20 25 30 35 40 45 50 10 100 1000 10000 ground current (a) load (ma) 1.8v 1.9v 2.5v 3.0v 3.4v 3.8v 4.2v 4.6v 5.0v 5.5v 09298-019 figure 11. ground current vs. load current, different input voltages (v in ) 0 0.05 0.10 0.15 0.20 0.25 0.30 0.35 0.40 0.45 0.50 ?40 ?20 0 20 40 60 80 100 i gnd shutdown current ( a) temperature (c) 1.8v 1.9v 2.5v 3.0v 3.4v 3.8v 4.2v 4.6v 5.0v 5.5v 09298-020 figure 12. ground shutdown current vs. temperature, output open, different input voltages (v in ) temperature (c) 0.01 0.1 1 10 ?40 ?20 0 20 40 60 80 100 i gnd shutdown current ( a) 0 9298-021 1.8v 1.9v 2.5v 3.0v 3.4v 3.8v 4.2v 4.6v 5.0v 5.5v figure 13. ground shutdown current vs. temperature, v out = 0 v, different input voltages (v in ) 3 2 1 ch1 ampl 204ma ch1 100ma ch3 2v ch2 1v m1.00ms a ch3 1.28v t 10.20% b w b w ? b w 09298-008 i load v out v en figure 14. typical turn-on time and inrush current, v in = 1.9 v, 200 ma load 3 2 1 ch1 ampl 1.92a ch1 1a ch3 2v ch2 1v m1.00ms a ch3 1.28v t 10.00% b w b w ? b w 09298-009 i load v out v en figure 15. typical turn-on time and inrush current, v in = 1.9 v, 2 a load
ADP197 rev. 0 | page 8 of 16 3 2 1 ch1 ampl 266ma ch1 100ma ch3 2v ch2 2v m1.00ms a ch3 1.28v t 10.00% b w b w ? b w 09298-010 i load v out v en figure 16. typical turn-on time and inrush current, v in = 1.9 v, 200 ma load, c out = 100 f 3 2 1 ch1 ampl 1.92a ch1 1a ch3 2v ch2 2v m1.00ms a ch3 1.28v t 10.00% b w b w ? b w 09298-011 i load v out v en figure 17. typical turn-on time and inrush current, v in = 1.9 v, 2 a load, c out = 100 f 3 2 1 ch1 ampl 222ma ch1 100ma ch3 2v ch2 2v m1.00ms a ch3 1.28v t 10.00% b w b w ? b w 09298-012 i load v out v en figure 18. typical turn-on time and inrush current, v in = 5.5 v, 200 ma load 3 2 1 ch1 ampl 2.14a ch1 1a ch3 2v ch2 2v m1.00ms a ch3 1.28v t 10.00% b w b w ? b w 09298-013 i load v out v en figure 19. typical turn-on time and inrush current, v in = 5.5 v, 2 a load 3 2 1 ch1 ampl 352ma ch1 200ma ch3 2v ch2 2v m1.00ms a ch3 1.28v t 10.00% b w b w ? b w 09298-014 i load v out v en figure 20. typical turn-on time and inrush current, v in = 5.5 v, 200 ma load, c out = 100 f 3 2 1 ch1 ampl 2.12a ch1 1a ch3 2v ch2 2v m1.00ms a ch3 1.28v t 10.00% b w b w ? b w 09298-015 i load v out v en figure 21. typical turn-on time and inrush current, v in = 5.5 v, 2 a load, c out = 100 f
ADP197 rev. 0 | page 9 of 16 0.0001 0.001 0.01 0.1 1 10 ?40 ?20 0 20 40 60 80 100 i out shutdown current ( a) temperature (c) 1.8v 1.9v 2.5v 3.0v 3.4v 3.8v 4.2v 4.6v 5.0v 5.5v 09298-022 figure 22. output shutdown current vs. temperature, v out = 0 v, different input voltages (v in )
ADP197 rev. 0 | page 10 of 16 theory of operation gnd en vin vout ADP197 09298-023 charge pump and slew rate control overtemperature protection figure 23. functional block diagram the ADP197 is a high-side nmos load switch, controlled by an internal charge pump. the apd197 is designed to operate with power supply voltages between 1.8 v and 5.5 v. an internal charge pump biases the nmos switch to achieve a relatively constant, ultralow on resistance of 12 m across the entire input voltage range. the use of the internal charge pump also allows for controlled turn-on times. turning the nmos switch on and off is controlled by the enable input, en, which is capable of interfacing directly with 1.8 v logic signals. the ADP197 is capable of 3 a of continuous current as long as t j is less than 70c. at 85c, the rated current drops to 2.22 a. the overtemperature protection circuit activates if the load cur- rent causes the junction temperature to exceed 125c. when this occurs, the overtemperature protection circuitry disables the output until the junction temperature falls below approximately 110c, at which point the output is reenabled. if the fault condition persists, the output cycles off and on until the fault is removed. esd protection structures are shown in the block diagram as zener diodes. the ADP197 is a low quiescent current device with a nominal 4 m pull-down resistor on its enable pin (en). the package is a space-saving 1.0 mm 1.5 mm, 6-ball wlcsp.
ADP197 rev. 0 | page 11 of 16 applications information capacitor selection output capacitor the ADP197 is designed for operation with small, space-saving ceramic capacitors but functions with most commonly used capa- citors when the effective series resistance (esr) value is carefully considered. the esr of the output capacitor affects the response to load transients. a typical 1 f capacitor with an esr of 0.1 or less is recommended for good transient response. using a larger value of output capacitance improves the transient response to large changes in load current. input bypass capacitor connecting at least 1 f of capacitance from vin to gnd reduces the circuit sensitivity to the printed circuit board (pcb) layout, especially when high source impedance or long input traces are encountered. when greater than 1 f of output capacitance is required, increase the input capacitor to match it. ground current the major source for ground current in the ADP197 is the internal charge pump for the fet drive circuitry. figure 24 shows the typical ground current when v en = v in , and varies from 1.8 v to 5.5 v. 0 5 10 15 20 25 30 35 40 45 50 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 ground current (a) v in (v) 09298-024 50ma 100ma 200ma 500ma 1000ma 3000ma figure 24. ground current vs. load current, different input voltages (v in ) enable feature the ADP197 uses the en pin to enable and disable the vout pin under normal operating conditions. as shown in figure 25 , when a rising voltage (v en ) on the en pin crosses the active threshold, vout turns on. when a falling voltage (v en ) on the en pin crosses the inactive threshold, vout turns off. 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 0 0.2 0.4 0.6 0.8 1.0 1.2 v out (v) enable voltage (v) v en falling v en rising v out at 3.6v 09298-025 figure 25. typical en operation as shown in figure 25 , the en pin has hysteresis built into it. this prevents on/off oscillations that can occur due to noise on the en pin as it passes through the threshold points. the en pin active/inactive thresholds derive from the v in voltage; therefore, these thresholds vary with the changing input voltage. figure 26 shows the typical en active/inactive thresholds when the input voltage varies from 1.8 v to 5.5 v. 0 0.2 0.4 0.6 0.8 1.0 1.2 1.82.22.63.03.43.84.24.65.05.4 enable th r eshold (v) input voltage (v) en rise en fall 09298-026 figure 26. typical en thresholds vs. input voltage (v in ) timing turn-on delay is defined as the interval between the time that v en exceeds the rising threshold voltage and when v out rises to ~10% of its final value. the ADP197 includes circuitry that has a typical 1 ms turn-on delay and a controlled rise time to limit the v in inrush current. as shown in figure 27 and figure 28 , the turn- on delay is nearly independent of the input voltage.
ADP197 rev. 0 | page 12 of 16 ch1 100ma ch3 2v ch2 1v m1.00ms a ch3 1.28v 3 1 2 t 10.20% b w b w ? b w ch1 ampl 204ma 09298-027 figure 27. typical turn-on delay time with v in = 1.9 v, i load = 200 ma 3 2 1 ch1 ampl 222ma ch1 100ma ch3 2v ch2 2v m1.00ms a ch3 1.28v t 10.00% b w b w ? b w 09298-028 figure 28. typical turn-on delay time with v in = 5.5 v, i load = 220 ma the rise time is defined as the time it takes the output voltage to rise from 10% to 90% of v out reaching its final value. it is depen- dent on the rise time of the internal charge pump. for very large values of output capacitance, the rc time constant (where c is the load capacitance (c load ) and r is the rds on ||r load ) can become a factor in the rise time of the output voltage. because rds on is much smaller than r load , an adequate approximation for rc is rds on c load . an input or load capacitor is not required for the ADP197 although capacitors can be used to suppress noise on the board. 3 2 1 ch1 ampl 266ma ch1 100ma ch3 2v ch2 2v m1.00ms a ch3 1.28v t 10.00% b w b w ? b w 09298-029 figure 29. typical rise time and inrush current, c load = 100 f, v in = 1.9 v, i load = 270 ma 3 2 1 ch1 ampl 352ma ch1 200ma ch3 2v ch2 2v m1.00ms a ch3 1.28v t 10.00% b w b w ? b w 09298-030 figure 30. typical rise time and inrush current, c load = 100 f, v in = 5.5 v, i load = 350 ma the turn-off time is defined as the time it takes for the output voltage to fall from 90% to 10% of v out reaching its final value. it is also dependent on the rc time constant of the output capacit- ance and load resistance. figure 31 shows the typical turn-off time with v in = 3.6 v, c out = 1 f, and r load = 18 . ch1 1v ch2 1v m20s a ch1 240mv 1 2 t 20.20% b w b w 09298-031 figure 31. typical turn-off time
ADP197 rev. 0 | page 13 of 16 outline dimensions 0.50 bsc 1.00 bsc 1.50 1.45 1.40 1.00 0.95 0.90 seating plane 0.675 0.595 0.515 0.075 coplanarity 0.380 0.355 0.330 0.345 0.295 0.245 0.270 0.240 0.210 a1 ball corner 0.50 bsc a 12 b c top view (ball side down) bottom view (ball side up) 081607-b figure 32. 6-ball wafer level chip scale package [wlcsp] (cb-6-2) dimensions shown in millimeters ordering guide model 1 temperature range package description package option branding ADP197acbz-r7 ?40c to +85c 6-ball wafer level chip scale package [wlcsp] cb-6-2 87 ADP197cb-evalz evaluation board 1 z = rohs compliant part.
ADP197 rev. 0 | page 14 of 16 notes
ADP197 rev. 0 | page 15 of 16 notes
ADP197 rev. 0 | page 16 of 16 notes ?2011 analog devices, inc. all rights reserved. trademarks and registered trademarks are the property of their respective owners. d09298-0-3/11(0)

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