MIC2601/2

1.2A, 1.2MHz/2MHz Wide Input Range

Integrated Switch Boost Regulator

General Description

The MIC2601/2 is a 1.2MHz/2MHz, PWM DC/DC boost

switching regulator available in a 2mm x 2mm MLF

®

package. High power density is achieved with the

MIC2601/2’s internal 40V/1.2A switch, allowing it to power

large loads in a tiny footprint.

The

MIC2601/2

implements

constant

frequency

1.2MHz/2MHz PWM current mode control. The MIC2601/2

offers internal compensation that provides 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.

Soft start reduces in rush current and is programmable via

external capacitor.

The MIC2601/2 is available in a 2mm x 2mm 8-pin MLF

®

leadless package. Both devices have an output over-

voltage protection feature.

The MIC2601/2 has an operating junction temperature

range of –40

Data sheets and support documentation can be found on

Micrel’s web site at: www.micrel.com.

Features

• Wide input voltage range: 4.5V to 20V

• Output voltage adjustable to 40V

• 1.2A switch current

• MIC2601 operates at 1.2MHz

• MIC2602 operates at 2MHz

• Stable with small size ceramic capacitors

• High efficiency

• Programmable soft start

• <10µA shutdown current

• UVLO

• Output over-voltage protection

• Over temperature shutdown

Applications

• Multimedia STB/Antenna

• Broadband communications

• TFT-LCD bias supplies

• Bias supply

• Positive output regulators

• SEPIC converters

• DSL applications

• Local boost regulators

___________________________________________________________________________________________________________

Typical Application

10µH

6.65K

MIC2601/2

VIN

18V, 500mA

EN

SW

FB

PGND

2.2µF

10µF

SS

0.1µF

VDD

AGND

0.1µF

0

10

20

30

40

50

60

70

80

90

100

0

LOAD CURRENT (mA)

0 100 200 300 400 500 600 700 800

MLF and MicroLeadFrame are registered trademarks of Amkor Technology, Inc.

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

September 2009

M9999-090909-A