Datasheet

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Logic Controlled,

High-Side Power Switch

Data Sheet

ADP194

Rev. A

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FEATURES

Low RDS

of 80 mΩ at 1.8 V

Low input voltage range: 1.1 V to 3.6 V

500 mA continuous operating current

Built-in level shift for control logic that can be operated

by 1.2 V logic

Low 2 μA (maximum) ground current

Ultralow shutdown current <0.7 μA

Reverse current blocking

Ultrasmall 0.8 mm × 0.8 mm × 0.5mm, 4-ball, 0.4 mm

pitch WLCSP

APPLICATIONS

Mobile phones

Digital cameras and audio devices

Portable and battery-powered equipment

TYPICAL APPLICATIONS CIRCUIT

GND

–

LOAD

VIN

VOUT

ADP194

LEVEL SHIFT

AND SLEW

RATE CONTROL

OFF

08629-001

REVERSE

POLARITY

PROTECTION

Figure 1.

GENERAL DESCRIPTION

The ADP194 is a high-side load switch designed for operation

from 1.1 V to 3.6 V and is protected against reverse current flow

from output to input. This load switch provides power domain

isolation for extended power battery life. The device contains a

low on-resistance P-channel MOSFET that supports more than

500 mA of continuous load current and minimizes power loss.

The low 2 µA (maximum) ground current and ultralow shut-

down current make the ADP194 ideal for battery-operated

portable equipment. The built-in level shifter in the enable logic

input makes the ADP194 compatible with modern processors

and GPIO controllers.

Beyond operating performance, the ADP194 occupies minimal

printed circuit board (PCB) space with an area of less than

0.64 mm

and a height of 0.50 mm. The ADP194 is available in

an ultrasmall 0.8 mm × 0.8 mm, 4-ball, 0.4 mm pitch WLCSP.

Summary of content (12 pages)

PAGE 1
Logic Controlled, High-Side Power Switch ADP194 Data Sheet FEATURES TYPICAL APPLICATIONS CIRCUIT ADP194 REVERSE POLARITY PROTECTION VOUT VIN + – GND EN ON LEVEL SHIFT AND SLEW RATE CONTROL LOAD 08629-001 Low RDSON of 80 mΩ at 1.8 V Low input voltage range: 1.1 V to 3.6 V 500 mA continuous operating current Built-in level shift for control logic that can be operated by 1.2 V logic Low 2 μA (maximum) ground current Ultralow shutdown current <0.7 μA Reverse current blocking Ultrasmall 0.8 mm × 0.
PAGE 2
ADP194 Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 Pin Configuration and Function Descriptions..............................5 Applications....................................................................................... 1 Typical Performance Characteristics ..............................................6 Typical Applications Circuit............................................................
PAGE 3
Data Sheet ADP194 SPECIFICATIONS VIN = 1.8 V, VEN = VIN, ILOAD = 200 mA, TA = 25°C, unless otherwise noted. Table 1. Parameter INPUT VOLTAGE RANGE EN INPUT EN Input Threshold Symbol VIN Test Conditions TJ = −40°C to +85°C Min 1.1 VEN_TH Logic High Voltage Logic Low Voltage EN Input Pull-Down Resistance CURRENT Ground Current 1 Shutdown Current VIH VIL REN 1.1 V ≤ VIN ≤ 1.3 V, TJ = −40°C to +85°C 1.3 V < VIN < 1.8 V, TJ = −40°C to +85°C 1.8 V ≤ VIN ≤ 3.6 V, TJ = −40°C to +85°C 1.1 V ≤ VIN ≤ 3.6 V 1.
PAGE 4
ADP194 Data Sheet ABSOLUTE MAXIMUM RATINGS 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 Operating Ambient Temperature Range Soldering Conditions Rating −0.3 V to +4.0 V −0.3 V to +4.0 V −0.3 V to +4.
PAGE 5
Data Sheet ADP194 PIN CONFIGURATION AND FUNCTION DESCRIPTIONS A 1 2 VIN VOUT B EN GND 08629-002 TOP VIEW (Not to Scale) Figure 3. Pin Configuration Table 4. Pin Function Descriptions Pin No. A1 B1 A2 B2 Mnemonic VIN EN VOUT GND Description Input Voltage. Enable Input. Drive EN high to turn on the switch; drive EN low to turn off the switch. Output Voltage. Ground. Rev.
PAGE 6
ADP194 Data Sheet TYPICAL PERFORMANCE CHARACTERISTICS VIN = 1.8 V, VEN = VIN > VIH, ILOAD = 100 mA, TA = 25°C, unless otherwise noted. 0.12 4.0 3.5 0.10 3.0 ILOAD = 20mA ILOAD = 50mA ILOAD = 100mA ILOAD = 200mA ILOAD = 500mA 0.06 0.04 2.5 2.0 1.5 1.0 0.02 0.5 –40 –5 25 65 0 08629-004 0 VEN VIN = 1.5V VIN = 1.8V VIN = 2.5V VIN = 3.6V 85 TEMPERATURE (°C) 0 20 40 60 100 80 TIME (µs) Figure 4. RDSON vs. Temperature 08629-007 VOLTAGE (V) RDSON (Ω) 0.08 Figure 7.
PAGE 7
Data Sheet ADP194 5.0 10 IGND SHUTDOWN CURRENT (µA) IGND SHUTDOWN CURRENT (µA) 4.5 4.0 3.5 VIN = 1.1V VIN = 1.5V VIN = 1.8V 3.0 2.5 VIN = 2.4V VIN = 2.7V VIN = 3.3V VIN = 3.6V 2.0 1.5 1.0 VIN = 3.3V VIN = 3.6V VIN = 2.4V VIN = 2.7V VIN = 1.8V 1 VIN = 1.5V VIN = 1.1V –20 0 20 40 60 80 100 TEMPERATURE (°C) 0.1 –40 08629-010 0 –40 –20 0 20 40 60 80 100 TEMPERATURE (°C) 08629-013 0.5 Figure 13. Reverse Shutdown Current vs. Temperature, VOUT = 0 V Figure 10.
PAGE 8
ADP194 Data Sheet THEORY OF OPERATION The reverse current protection circuitry prevents current flow backwards through the ADP194 when the output voltage is greater than the input voltage. A comparator senses the difference between the input and output voltages. When the difference between the input voltage and output voltage exceeds 50 mV, the body of the PFET is switched to VOUT and turned off or opened. In other words, the gate is connected to VOUT. The package is a space-saving 0.8 mm × 0.
PAGE 9
Data Sheet ADP194 APPLICATIONS INFORMATION GROUND CURRENT ENABLE FEATURE The major source for ground current in the ADP194 is the 4 MΩ pull-down resistor on the enable (EN) pin. Figure 16 shows typical ground current when VEN = VIN and VIN varies from 1.1 V to 3.6 V. The ADP194 uses the EN pin to enable and disable the VOUT pin under normal operating conditions. As shown in Figure 18, when a rising voltage on EN crosses the active threshold, VOUT turns on.
PAGE 10
ADP194 Data Sheet TIMING VEN Turn-on delay is defined as the delta between the time that EN reaches >1.1 V until VOUT rises to ~10% of its final value. The ADP194 includes circuitry to set the typical 1.5 μs turn-on delay at 3.6 V VIN to limit the VIN inrush current. As shown in Figure 20, the turn-on delay is dependent on the input voltage. VOUT 3 LOAD CURRENT 4.0 1 3.5 089629-022 2 2.5 CH1 1.00V BW CH3 1.00V BW 2.0 400mV VEN VIN = 1.5V VIN = 1.8V VIN = 2.5V VIN = 3.6V 0.
PAGE 11
Data Sheet ADP194 THERMAL CONSIDERATIONS In most applications, the ADP194 does not dissipate much heat due to its low on-channel resistance. However, in applications with high ambient temperature and high load current, the heat dissipated in the package can cause the junction temperature of the die to exceed the maximum junction temperature of 125°C.
PAGE 12
ADP194 Data Sheet OUTLINE DIMENSIONS 0.800 0.740 SQ 0.720 2 1 A BALL A1 IDENTIFIER B 0.40 REF TOP VIEW BOTTOM VIEW (BALL SIDE DOWN) 0.560 0.500 0.440 END VIEW (BALL SIDE UP) 0.330 0.300 0.270 SEATING PLANE 0.300 0.260 0.220 0.230 0.200 0.170 10-08-2010-A COPLANARITY 0.03 Figure 26.