Microchip MIC23031 Bedienungsanleitung

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 2021 Microchip Technology Inc.DS20006538A-page 1

MIC23031

Features

•Input Voltage: 2.7V to 5.5V

•400mA Output Current

•Up to 93% Efficiency and 88% at 1mA

•21µA Typical Quiescent Current

•4MHz PWM Operation in Continuous Mode

•Ultra-Fast Transient Response

•Low Voltage Output Ripple

-20mV

PP

Ripple in HyperLight Load

®

Mode

-3mV Output Voltage Ripple in Full PWM

Mode

•0.01µA Shutdown Current

•MIC23031 Fixed and Adjustable Output Voltage

Options Available

•1.6mm x 1.6mm 6-Lead TDFN Package

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

Applications

•Mobile Handsets

•Portable Media/MP3 Players

•Portable Navigation Devices (GPS)

•WiFi/WiMax/WiBro Modules

•Digital Cameras

•Wireless LAN Cards

•USB-Powered Devices

•Portable Applications

General Description

The MIC23031 is a high-efficiency, 4MHz, 400mA

synchronous buck regulator with HyperLight Load

®

mode. HyperLight Load provides very high efficiency at

light loads and ultra-fast transient response that is

perfectly suited for supplying processor core voltages.

An additional benefit of this proprietary architecture is

the very low output ripple voltage throughout the entire

load range with the use of small output capacitors. The

tiny 1.6mm x 1.6mm TDFN package saves precious

board space and requires only three external

components.

The MIC23031 is designed for use with a very small

inductor, down to 0.47µH, and an output capacitor as

small as 2.2µF that enables a sub 1mm height.

The MIC23031 has a very low quiescent current of

21µA and achieves as high as 88% efficiency at 1mA.

At higher loads, the MIC23031 provides a constant

switching frequency around 4MHz while achieving

peak efficiencies up to 93%.

The MIC23031 is available in a 6-pin 1.6mm x 1.6mm

TDFN package with an operating junction temperature

range of –40°C to +125°C.

Typical Application Circuit

Efficiency V

OUT

= 2.5V

4 MHz PWM 400 mA Buck Regulator with HyperLight Load

®

Produktspezifikationen