Logic Controlled,

High-Side Power Switches

ADP190/ADP191

Rev. D

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FEATURES

Internal output discharge resistor (ADP191)

Turn-on slew rate limiting (ADP191)

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: <1 μA

Ultrasmall 0.8 mm × 0.8 mm, 4-ball, 0.4 mm pitch WLCSP

APPLICATIONS

Mobile phones

Digital cameras and audio devices

Portable and battery-powered equipment

TYPICAL APPLICATIONS CIRCUIT

GND

EN

+

–

LOAD

VIN

VOUT

ADP190

LEVEL SHIFT

AND SLEW

RATE CONTROL

OFF

ON

Figure 1.

GND

EN

+

–

LOAD

VIN

VOUT

ADP191

LEVEL SHIFT

AND SLEW

RATE CONTROL

AND LOAD

DISCHARGE

OFF

ON

Figure 2.

GENERAL DESCRIPTION

The ADP190/ADP191 are high-side load switches designed for

operation from 1.1 V to 3.6 V. These load switchs provide power

domain isolation for extended power battery life. The devices

contain a low on-resistance P-channel MOSFET that supports

more than 500 mA of continuous current and minimizes power

loss. The low 2 μA (maximum) of ground current and ultralow

shutdown current make the ADP190/ADP191 ideal for battery-

operated portable equipment. The built-in level shifter for enable

logic makes the ADP190/ADP191 compatible with modern

processors and GPIO controllers.

The ADP191 controls the turn-on slew rate of the switch to

reduce the input inrush current. The ADP191 also incorporates

an internal output discharge resistor to discharge the output

capacitance when the ADP191 output is disabled.

Beyond operating performance, the ADP190/ADP191 occupy

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

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