5 V, 3 A Logic Controlled High-Side Power Switch ADP197 Low RDSON of 12 mΩ Low input voltage range: 1.8 V to 5.5 V 3 A continuous operating current at 70°C 1.2 V logic compatible enable input Low 18 μA quiescent current, VIN < 3 V Low 30 μA quiescent current, VIN = 5 V Overtemperature protection Ultralow shutdown current: <1 μA Ultrasmall 1.0 mm × 1.5 mm, 6-ball, 0.5 mm pitch WLCSP APPLICATIONS TYPICAL APPLICATIONS CIRCUIT VIN + – VOUT GND ON EN OFF CHARGE PUMP AND SLEW RATE CONTROL OVERTEMPERATURE PROTECTION ADP197 LOAD 09298-001 FEATURES Figure 1. Mobile phones Digital cameras and audio devices Portable and battery-powered equipment 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 μA 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 125°C, 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 mm2 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. 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. ADP197 TABLE OF CONTENTS Features .............................................................................................. 1 Typical Performance Characteristics ..............................................6 Applications....................................................................................... 1 Theory of Operation ...................................................................... 10 Typical Applications Circuit............................................................ 1 Applications Information .............................................................. 11 General Description ......................................................................... 1 Capacitor Selection .................................................................... 11 Revision History ............................................................................... 2 Ground Current.......................................................................... 11 Specifications..................................................................................... 3 Enable Feature ............................................................................ 11 Timing Diagram ........................................................................... 3 Timing ......................................................................................... 11 Absolute Maximum Ratings............................................................ 4 Outline Dimensions ....................................................................... 13 ESD Caution.................................................................................. 4 Ordering Guide .......................................................................... 13 Pin Configuration and Function Descriptions............................. 5 REVISION HISTORY 3/11—Revision 0: Initial Version Rev. 0 | Page 2 of 16 ADP197 SPECIFICATIONS VIN = 1.8 V, VEN = VIN, IOUT = 1 A, TA = 25°C, unless otherwise noted. Table 1. Parameter INPUT VOLTAGE RANGE EN INPUT EN Input EN Input Pull-Down Current CURRENT Ground Current Off State Current Continuous Operating Current 1 VIN TO VOUT RESISTANCE Symbol VIN Test Conditions/Comments TJ = −40°C to +85°C Min 1.8 VIH VIL IEN VIN = 1.8 V to 5.5 V VIN = 1.8 V to 5.5 V VIN = 1.8 V 1.2 IGND VIN = 1.8 V VIN = 3.4 V VIN = 4.2 V, TJ = −40°C to +85°C VIN = 5.5 V VEN = GND, VOUT = 0 V, VIN = 4.2 V VEN = GND, TJ = −40°C to +85°C, VOUT = 0 V, VIN = 1.8 V to 5.5 V VIN = 1.8 V to 5.5 V 18 14 18 28 0.1 3 μA μA μA μA μA μA A VIN = 5.5 V VIN = 4.2 V VIN = 1.8 V VIN = 1.8 V, TJ = −40°C to +85°C See Figure 2 VIN = 1.8 V to 5.5 V, CLOAD = 1 μF 0.012 0.012 0.012 0.012 Ω Ω Ω Ω IOFF IOUT RDSON VOUT TURN-ON DELAY TIME Turn-On Delay Time tON_DLY THERMAL SHUTDOWN Thermal Shutdown Threshold Thermal Shutdown Hysteresis TSSD TSSD-HYS 1 Typ Max 5.5 Unit V 0.4 V V nA 500 TJ rising 30 20 0.017 1 ms 125 15 °C °C At an ambient temperature of 85°C, the part can withstand a continuous current of 2.22 A. At a load current of 3 A, the operational lifetime derates to 2190 hours. TIMING DIAGRAM VEN TURN-ON DELAY 90% TURN-OFF DELAY VOUT TURN-ON RISE TURN-OFF FALL Figure 2. Timing Diagram Rev. 0 | Page 3 of 16 09298-002 10% ADP197 ABSOLUTE MAXIMUM RATINGS Table 3. Typical θJA and ΨJB Values Table 2. Parameter VIN to GND VOUT to GND EN to GND Continuous Drain Current TA = 25°C TA = 85°C Continuous Diode Current Storage Temperature Range Operating Junction Temperature Range Soldering Conditions Rating −0.3 V to +6.5 V −0.3 V to VIN −0.3 V to VIN Package Type 6-Ball, 0.5 mm Pitch WLCSP ESD CAUTION ±4 A ±2.22 A −50 mA −65°C to +150°C −40°C to +105°C 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. Rev. 0 | Page 4 of 16 θJA 260 ΨJB 58 Unit °C/W ADP197 A 1 2 VIN VOUT B VIN VOUT C EN GND ADP197 TOP VIEW (Not to Scale) 09298-003 PIN CONFIGURATION AND FUNCTION DESCRIPTIONS Figure 3. Pin Configuration Table 4. Pin Function Descriptions Pin No. A1, B1 A2, B2 C1 C2 Mnemonic VIN VOUT EN GND Description Input Voltage. Output Voltage. Enable Input. Drive EN high to turn on the switch and drive EN low to turn off the switch. Ground. Rev. 0 | Page 5 of 16 ADP197 TYPICAL PERFORMANCE CHARACTERISTICS VIN = 1.8 V, VEN = VIN, CIN = COUT = 1 μF, TA = 25°C, unless otherwise noted. 0.016 0.014 0.050 1.8V 3.4V 4.2V 5.5V 0.045 0.040 0.012 50mA 100mA 200mA 500mA 1000mA 3000mA DIFFERENCE (V) 0.035 RDSON (Ω) 0.010 0.008 0.006 0.030 0.025 0.020 0.015 0.004 0.010 0.002 10 20 30 40 50 60 70 80 90 TEMPERATURE (°C) 0 09298-004 0 50 45 40 GROUND CURRENT (µA) 0.012 0.010 0.008 0.006 0.004 65 85 100mA 200mA 500mA 1000mA 3000mA 35 30 25 20 15 10 0.002 10 20 30 40 50 60 70 80 TEMPERATURE (°C) 90 0 09298-005 0 25 65 85 Figure 8. Ground Current vs. Temperature, Different Load Currents, VIN = 1.8 V 50 50mA 100mA 200mA 500mA 1000mA 3000mA 45 40 GROUND CURRENT (µA) 0.020 –5 TEMPERATURE (°C) Figure 5. RDSON vs. Temperature, 3 A, Different Input Voltages (VIN) 0.025 –40 09298-016 5 0 –40 –30 –20 –10 0.015 0.010 100mA 200mA 500mA 1000mA 3000mA 35 30 25 20 15 10 0.005 0 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 VIN (V) Figure 6. RDSON vs. Input Voltage (VIN), Different Load Currents 0 –40 –5 25 TEMPERATURE (°C) 65 85 09298-017 5 09298-006 RDSON (Ω) RDSON (Ω) 25 Figure 7. Voltage Drop vs. Temperature, Different Load Currents 1.8V 3.4V 4.2V 5.5V 0.014 –5 TEMPERATURE (°C) Figure 4. RDSON vs. Temperature, 500 mA 0.016 –40 09298-007 0.005 0 –40 –30 –20 –10 Figure 9. Ground Current vs. Temperature, Different Load Currents, VIN = 4.2 V Rev. 0 | Page 6 of 16 ADP197 45 GROUND CURRENT (µA) 40 10 100mA 200mA 500mA 1000mA 3000mA IGND SHUTDOWN CURRENT (µA) 50 35 30 25 20 15 10 1 1.8V 1.9V 2.5V 3.0V 3.4V 3.8V 4.2V 4.6V 5.0V 5.5V 0.1 –40 –5 25 65 0.01 –40 09298-018 0 85 TEMPERATURE (°C) Figure 10. Ground Current vs. Temperature, Different Load Currents, VIN = 5.5 V 50 45 GROUND CURRENT (µA) 40 35 30 –20 0 20 40 60 TEMPERATURE (°C) 80 100 09298-021 5 Figure 13. Ground Shutdown Current vs. Temperature, VOUT = 0 V, Different Input Voltages (VIN) 1.8V 1.9V 2.5V 3.0V 3.4V 3.8V 4.2V 4.6V 5.0V 5.5V ILOAD CH1 AMPL 204mA 1 VOUT 25 20 15 2 VEN 10 5 1000 10000 LOAD (mA) Figure 11. Ground Current vs. Load Current, Different Input Voltages (VIN) 0.50 IGND SHUTDOWN CURRENT (µA) 0.45 0.40 0.35 0.30 1.8V 1.9V 2.5V 3.0V 3.4V 3.8V 4.2V 4.6V 5.0V 5.5V CH1 100mA Ω BW CH2 1V B CH3 2V W B W M1.00ms T 10.20% A CH3 09298-008 100 09298-019 3 0 10 1.28V Figure 14. Typical Turn-On Time and Inrush Current, VIN = 1.9 V, 200 mA Load ILOAD CH1 AMPL 1.92A 1 VOUT 0.25 0.20 0.15 2 VEN 0.10 0.05 0 20 40 TEMPERATURE (°C) 60 80 100 Figure 12. Ground Shutdown Current vs. Temperature, Output Open, Different Input Voltages (VIN) CH1 1A Ω BW CH2 1V B CH3 2V W B W M1.00ms T 10.00% A CH3 1.28V Figure 15. Typical Turn-On Time and Inrush Current, VIN = 1.9 V, 2 A Load Rev. 0 | Page 7 of 16 09298-009 3 –20 09298-020 0 –40 ADP197 ILOAD ILOAD CH1 AMPL 266mA 1 1 CH1 AMPL 2.14A VOUT VOUT 2 2 VEN VEN B W M1.00ms T 10.00% A CH3 09298-010 CH1 100mA Ω BW CH2 2V B CH3 2V W 1.28V Figure 16. Typical Turn-On Time and Inrush Current, VIN = 1.9 V, 200 mA Load, COUT = 100 μF CH1 1A Ω BW B CH3 2V W CH2 2V B W M1.00ms T 10.00% A CH3 09298-013 3 3 1.28V Figure 19. Typical Turn-On Time and Inrush Current, VIN = 5.5 V, 2 A Load ILOAD ILOAD CH1 AMPL 1.92A 1 1 CH1 AMPL 352mA VOUT VOUT 2 2 VEN VEN 3 B W M1.00ms T 10.00% A CH3 1.28V CH1 200mA Ω BW B CH3 2V W Figure 17. Typical Turn-On Time and Inrush Current, VIN = 1.9 V, 2 A Load, COUT = 100 μF CH2 2V B W A CH3 1.28V Figure 20. Typical Turn-On Time and Inrush Current, VIN = 5.5 V, 200 mA Load, COUT = 100 μF ILOAD 1 M1.00ms T 10.00% 09298-014 CH2 2V 09298-011 3 CH1 1A Ω BW B CH3 2V W ILOAD CH1 AMPL 222mA VOUT 1 CH1 AMPL 2.12A VOUT 2 2 VEN 3 CH1 100mA Ω BW CH2 2V B CH3 2V W B W M1.00ms T 10.00% A CH3 1.28V 09298-012 3 Figure 18. Typical Turn-On Time and Inrush Current, VIN = 5.5 V, 200 mA Load CH1 1A Ω BW B CH3 2V W CH2 2V B W M1.00ms T 10.00% A CH3 1.28V 09298-015 VEN Figure 21. Typical Turn-On Time and Inrush Current, VIN = 5.5 V, 2 A Load, COUT = 100 μF Rev. 0 | Page 8 of 16 ADP197 1 0.1 1.8V 1.9V 2.5V 3.0V 3.4V 3.8V 4.2V 4.6V 5.0V 5.5V 0.01 0.001 0.0001 –40 –20 0 20 40 TEMPERATURE (°C) 60 80 100 09298-022 IOUT SHUTDOWN CURRENT (µA) 10 Figure 22. Output Shutdown Current vs. Temperature, VOUT = 0 V, Different Input Voltages (VIN) Rev. 0 | Page 9 of 16 ADP197 THEORY OF OPERATION VIN on and off is controlled by the enable input, EN, which is capable of interfacing directly with 1.8 V logic signals. VOUT GND OVERTEMPERATURE PROTECTION ADP197 The overtemperature protection circuit activates if the load current causes the junction temperature to exceed 125°C. When this occurs, the overtemperature protection circuitry disables the output until the junction temperature falls below approximately 110°C, at which point the output is reenabled. If the fault condition persists, the output cycles off and on until the fault is removed. 09298-023 EN The ADP197 is capable of 3 A of continuous current as long as TJ is less than 70°C. At 85°C, the rated current drops to 2.22 A. CHARGE PUMP AND SLEW RATE CONTROL 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 mΩ across the entire input voltage range. The use of the internal charge pump also allows for controlled turn-on times. Turning the NMOS switch ESD protection structures are shown in the block diagram as Zener diodes. The ADP197 is a low quiescent current device with a nominal 4 MΩ pull-down resistor on its enable pin (EN). The package is a space-saving 1.0 mm × 1.5 mm, 6-ball WLCSP. Rev. 0 | Page 10 of 16 ADP197 APPLICATIONS INFORMATION 4.0 CAPACITOR SELECTION Output Capacitor 3.5 The ADP197 is designed for operation with small, space-saving ceramic capacitors but functions with most commonly used capacitors 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 μF capacitor with an ESR of 0.1 Ω 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. 3.0 VOUT (V) 2.5 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 VEN = VIN, and varies from 1.8 V to 5.5 V. GROUND CURRENT (µA) 40 VEN RISING 0 0.2 0.4 0.6 0.8 1.0 1.2 ENABLE VOLTAGE (V) 09298-025 0.5 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 VIN 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. 1.2 EN RISE EN FALL 1.0 ENABLE THRESHOLD (V) 45 50mA 100mA 200mA 500mA 1000mA 3000mA VEN FALLING 1.0 0 GROUND CURRENT 50 2.0 1.5 Input Bypass Capacitor Connecting at least 1 μF 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 μF of output capacitance is required, increase the input capacitor to match it. VOUT AT 3.6V 35 30 25 20 15 0.8 0.6 0.4 0.2 10 1.5 2.0 2.5 3.0 3.5 VIN (V) 4.0 4.5 5.0 5.5 0 1.8 09298-024 0 1.0 2.2 2.6 3.0 3.4 3.8 4.2 4.6 5.0 INPUT VOLTAGE (V) 5.4 09298-026 5 Figure 26. Typical EN Thresholds vs. Input Voltage (VIN) Figure 24. Ground Current vs. Load Current, Different Input Voltages (VIN) TIMING 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 (VEN) on the EN pin crosses the active threshold, VOUT turns on. When a falling voltage (VEN) on the EN pin crosses the inactive threshold, VOUT turns off. Turn-on delay is defined as the interval between the time that VEN exceeds the rising threshold voltage and when VOUT 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 VIN inrush current. As shown in Figure 27 and Figure 28, the turnon delay is nearly independent of the input voltage. Rev. 0 | Page 11 of 16 ADP197 CH1 AMPL 204mA 1 CH1 AMPL 266mA 1 2 2 CH2 1V B W M1.00ms T 10.20% A CH3 1.28V 3 CH1 100mA Ω BW CH2 2V B CH3 2V W Figure 27. Typical Turn-On Delay Time with VIN = 1.9 V, ILOAD = 200 mA B M1.00ms T 10.00% W A CH3 1.28V Figure 29. Typical Rise Time and Inrush Current, CLOAD = 100 μF, VIN = 1.9 V, ILOAD = 270 mA CH1 AMPL 222mA 1 09298-029 CH1 100mA Ω BW B CH3 2V W 09298-027 3 CH1 AMPL 352mA 1 2 2 M1.00ms T 10.00% A CH3 1.28V Figure 28. Typical Turn-On Delay Time with VIN = 5.5 V, ILOAD = 220 mA The rise time is defined as the time it takes the output voltage to rise from 10% to 90% of VOUT reaching its final value. It is dependent 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 (CLOAD) and R is the RDSON||RLOAD) can become a factor in the rise time of the output voltage. Because RDSON is much smaller than RLOAD, an adequate approximation for RC is RDSON × CLOAD. An input or load capacitor is not required for the ADP197 although capacitors can be used to suppress noise on the board. 3 CH1 200mA Ω BW B CH3 2V W CH2 2V B W M1.00ms T 10.00% A CH3 09298-030 B W 1.28V Figure 30. Typical Rise Time and Inrush Current, CLOAD = 100 μF, VIN = 5.5 V, ILOAD = 350 mA The turn-off time is defined as the time it takes for the output voltage to fall from 90% to 10% of VOUT reaching its final value. It is also dependent on the RC time constant of the output capacitance and load resistance. Figure 31 shows the typical turn-off time with VIN = 3.6 V, COUT = 1 μF, and RLOAD = 18 Ω. 1 2 CH1 1V B W CH2 1V B W M20µs T 20.20% A CH1 Figure 31. Typical Turn-Off Time Rev. 0 | Page 12 of 16 240mV 09298-031 CH1 100mA Ω BW CH2 2V B CH3 2V W 09298-028 3 ADP197 OUTLINE DIMENSIONS 0.675 0.595 0.515 0.380 0.355 0.330 1.00 0.95 0.90 SEATING PLANE A1 BALL CORNER 0.345 0.295 0.245 1.50 1.45 1.40 2 1 A 1.00 BSC B 0.50 BSC C 0.270 0.240 0.210 0.50 BSC BOTTOM VIEW (BALL SIDE UP) 081607-B TOP VIEW (BALL SIDE DOWN) 0.075 COPLANARITY Figure 32. 6-Ball Wafer Level Chip Scale Package [WLCSP] (CB-6-2) Dimensions shown in millimeters ORDERING GUIDE Model 1 ADP197ACBZ-R7 ADP197CB-EVALZ 1 Temperature Range −40°C to +85°C Package Description 6-Ball Wafer Level Chip Scale Package [WLCSP] Evaluation Board Z = RoHS Compliant Part. Rev. 0 | Page 13 of 16 Package Option CB-6-2 Branding 87 ADP197 NOTES Rev. 0 | Page 14 of 16 ADP197 NOTES Rev. 0 | Page 15 of 16 ADP197 NOTES ©2011 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D09298-0-3/11(0) Rev. 0 | Page 16 of 16