MIC5019

Ultra-Small High-Side N-Channel MOSFET Driver

with Integrated Charge Pump

July 2012

Micrel

Preliminary and Confidential -

General Description

The MIC5019 is a high-side MOSFET driver with

integrated charge pump designed to switch an N-

Channel enhancement type MOSFET control signal in

high-side or low–side applications.

The MIC5019 operates from a 2.7V to 9V supply, and

generates gate voltages of 9.2V from a 3V supply, and

16V from a 9V supply. The device consumes a low 77µA

of supply current and less than 1µA of supply current in

shutdown mode.

In high side configurations, the source voltage of the

MOSFET approaches the supply voltage when switched

on. To keep the MOSFET turned on, the MIC5019’s

output drives the MOSFET gate voltage higher than the

supply voltage.

The MIC5019 is available in an ultra-small 4-pin 1.2mm

x 1.2mm Thin QFN Package and is rated for –40°C to

+125°C junction temperature range.

Features

• 4-pin 1.2mm x 1.2mm Thin QFN Package

• +2.7V to +9V supply voltage range

• 16V gate drive at VDD = 9V

• 8V gate drive at VDD = 2.7V

• Operates in low and high side configurations

• 150µA (typical) supply current at VDD = 5V

• <1µA shutdown supply current

• –40˚C to +125˚C Junction Temperature Range

Applications

• Load Switch

• Solenoid Drivers

• Motor Drivers

Application Diagram

Low-Voltage High-Side Power Switch

Low-Side Power Switch