Datasheet > MIC4782

MIC4782

更新时间： 2024-11-21 12:20:03

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	666K
描述
1.8 MHz Dual 2A Integrated Switch Buck Regulator

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MIC4782 数据手册

MIC4782

1.8 MHz Dual 2A Integrated Switch

Buck Regulator

General Description

Features

The Micrel MIC4782 is a high efficiency dual PWM buck

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

The MIC4782 operates at 1.8MHz. A proprietary internal

compensation technique allows a closed loop bandwidth of

over 200kHz.

•

3.0 to 6.0V supply voltage

1.8MHz 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

Ultra-small external components

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

MIC4782 allows efficiencies over 92%, reduces external

components count and eliminates the need for an

expensive current sense resistor.

Stable with a 1µH inductor and a 4.7µF output

capacitor

The MIC4782 operates from 3.0V to 6.0V 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

The MIC4782 is available in the exposed pad 16-pin

3mm x 3mm MLF^®with a junction operating range from

–20°C to +125°C.

Thermal shutdown and current limit protection

Available in a 3mm × 3mm 16-pin MLF^®

–20°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

5.0V_IN, 3.3V_OUTEfficiency

100

0.4

0.8

1.2

1.6

OUTPUT CURRENT (A)

2A, 1.8MHz 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

M9999-081709-D

August 2009

12 3 4 5 6 7...23

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