MIC2230

Dual Synchronous 800mA/800mA

Step-Down DC/DC Regulator

MLF and MicroLead Frame are registered trademarks of Amkor Technology, Inc.

Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (

April 2010

M9999-040810-C

General Description

The MIC2230 is dual output, high-efficiency synchronous

step-down DC/DC converter. The MIC2230 is ideally

suited for portable systems which demand high power

conversion efficiencies and fast transient performance,

while offered in a very small package. The MIC2230 offers

an ultra-low quiescent current in light load mode assuring

minimum current draw from battery powered applications

in standby modes. The MIC2230 was designed to only

require miniature 2.2µH inductors and 10µF ceramic

capacitors.

The MIC2230 features a selectable mode that allows the

user to trade-off lowest noise performance for low power

efficiency. Trickle Mode

efficiency at light loads, while PWM operation provides

very low ripple noise performance. To maximize battery life

in low-dropout conditions, MIC2230 can operate with a

maximum duty cycle of 100%.

The MIC2230 is available in a space-saving 3mm × 3mm

MLF

–40

°C to +125°C.

Data sheets and support documentation can be found on

Micrel’s web site at www.micrel.com.

Features

• High Efficiency: Over 96%

• Ultra-low quiescent current: Only 28µA

• Ultra-low shutdown current less than 1µA

• Fast transient performance

• 2.5MHz PWM operation

• High output current capability per channel: 800mA

• No Schottky Diodes Required

• Stable with 2.2µH inductor, 10µF ceramic capacitor

• Adjustable output voltage down to 0.8V

• Built-in soft-start circuitry

• Current limit protection

• Automatic switching into light load mode operation

• /FPWM pin allows low noise all-PWM mode operation

• Power good output with internal 5µA current source

allows sequencing with programmable delay time

Applications

• Cellular phones

• PDAs

• Digital Cameras

• MP3 Players

• PC Cards

• Wireless and DSL Modems

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Typical Application