MIC2296

High Power Density 1.2A

Boost Regulator

MLF and MicroLeadFrame is a trademark of Amkor Technology

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

April 2005

M9999-042005

(408) 955-1690

General Description

The MIC2296 is a 600kHz, PWM dc/dc boost switching

regulator available in a 2mm x 2mm MLF™ package

option. High power density is achieved with the MIC2296’s

internal 34V / 1.2A switch, allowing it to power large loads

in a tiny footprint. The MIC2296 is a version of the

MIC2295 1.2MHz, PWM dc/dc boost switching regulator,

that offers improved efficiency resulting from 600kHz

operation.

The MIC2296 implements constant frequency 600kHz

PWM current mode control. The MIC2296 offers internal

compensation that offers excellent transient response and

output regulation performance. The high frequency

operation saves board space by allowing small, low-profile

external components. The fixed frequency PWM scheme

also reduces spurious switching noise and ripple to the

input power source.

The MIC2296 is available in a low-profile Thin SOT23 5-

lead package and a 2mm x2mm 8-lead MLF™ leadless

package. The 2mm x 2mm MLF™ package option has an

output over-voltage protection feature.

The MIC2296 has an operating junction temperature range

of –40

°C to +125°C

Features

• 2.5V to 10V input voltage range

• Output voltage adjustable to 34V

• 1.2A switch current

• 600kHz PWM operation

• Stable with small size ceramic capacitors

• High efficiency

• Low input and output ripple

• <1µA shutdown current

• UVLO

• Output over-voltage protection (MIC2296BML)

• Over temperature shutdown

• 2mm x 2mm leadless 8-lead MLF™ package option

Applications

• Organic EL power supplies

• 3.3V to 5V/500mA conversion

• TFT-LCD bias supplies

• Positive and negative output regulators

• SEPIC converters

• Positive to negative Cuk converters

• 12V supply for DSL applications

• Multi-output dc/dc converters

10µH

R2

901

R1

10k

MIC2296BML

VIN

1-Cell

Li Ion

3V to 4.2V

15V/100mA

EN

FB

AGND

C1

2.2µF

2.2µF

PGND

SW

OVP

L1

10µH

R2

3.3k

R1

10k

MIC2296 BD5

VIN

1-Cell

Li Ion

5V/400mA

EN

SW

FB

GND

C1

2.2µF

10µF

1000 pF