MIC4742YMLTR

更新时间： 2024-02-05 08:51:44

品牌	Logo	应用领域
麦瑞 - MICREL		稳压器开关
页数	文件大小	规格书
23页	590K
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MIC4742YMLTR 数据手册

MIC4742

2 MHz Dual 2A Integrated Switch

Buck Regulator

General Description

Features

The Micrel MIC4742 is a high efficiency dual PWM buck

(step-down) regulator that provides dual 2A current output.

The MIC4742 operates at 2MHz. A proprietary internal

compensation technique allows a closed loop bandwidth of

over 200kHz.

•

2.9 to 5.5V supply voltage

2MHz PWM mode

2A Dual output

Greater than 92% efficiency

100% maximum duty cycle

Adjustable output voltage option down to 0.6V

Ultra-fast transient response

The low on-resistance internal P-Channel MOSFET of the

MIC4742 allows efficiencies over 92%, reduces external

components count and eliminates the need for an

expensive current sense resistor.

Ultra-small external components

Stable with a 1µH inductor and a 4.7µF output

capacitor

The MIC4742 operates from 2.9V to 5.5V input and the

output can be adjusted down to 0.6V. The device can

operate with a maximum duty cycle of 100% for use in low-

dropout conditions.

•

Fully integrated 2A MOSFET switches

Micro-power shutdown

Thermal shutdown and current limit protection

Available in a 3mm x 3mm 16-pin MLF^®and 16-pin

TSSOP

The MIC4742 is available in the exposed pad 16-pin

3mm x 3mm MLF^®and EPAD TSSOP-16 packages with a

junction operating range from –40°C to +125°C.

•

–40°C to +125°C junction temperature range

All support documentation can be found on Micrel’s web

site at: www.micrel.com.

Applications

•

Broadband: xDSL modems

Automotive satellite radios

HD STB, DVD/TV recorder

Computer peripherals: printers and graphic cards

FPGA/ASIC

General point of load

Typical Application

5.0Vin 3.3Vout Efficiency

100

0.4

0.8

1.2

1.6

OUTPUT CURRENT (A)

2A 2MHz Dual Buck Regulator

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

Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com

M9999-030209-D

March 2009

12 3 4 5 6 7...23

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