MIC4720YMMETR

更新时间： 2024-01-04 06:47:45

品牌	Logo	应用领域
麦瑞 - MICREL		稳压器开关
页数	文件大小	规格书
21页	1062K
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MIC4720YMMETR 数据手册

MIC4720

3mm x 3mm 2.0MHz 2A Integrated

Switch Buck Regulator

General Description

Features

The Micrel MIC4720 is a high efficiency PWM buck (step-

down) regulator that provides up to 2A of output current.

The MIC4720 operates at 2.0MHz and has proprietary

internal compensation that allows a closed loop bandwidth

of over 200KHz.

•

2.7 to 5.5V supply voltage

2.0MHz PWM mode

Output current to 2A

Up to 94% efficiency

100% maximum duty cycle

Adjustable output voltage option down to 1V

Ultra-fast transient response

Ultra-small external components

Stable with a 1µH inductor and a 4.7µF output

capacitor

Fully integrated 2A MOSFET switch

Micropower shutdown

The low on-resistance internal p-channel MOSFET of the

MIC4720 allows efficiencies over 92%, reduces external

components count and eliminates the need for an

expensive current sense resistor.

The MIC4720 operates from 2.7V to 5.5V input and the

output can be adjusted down to 1V. The devices can

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

dropout conditions.

•

Thermal shutdown and current limit protection

Pb-free 12-pin 3mm x 3mm MLF^®package

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

Pb-free 10-pin ePad MSOP package

The MIC4720 is available in the exposed pad 12-pin

3mm x 3mm MLF^®and 10-pin ePad MSOP package with a

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

Applications

•

FPGA/DSP/ASIC applications

General point of load

Broadband communications

DVD/TV recorder

Point of Sale

Printers/Scanners

Set Top Boxes

Computing Peripherals

Video Cards

Typical Application

MIC4720

3.3V_OUTEfficiency

100

V_IN= 4.5V

MIC4720

V_IN= 5.0V

V_IN= 5.5V

OUTPUT CURRENT (A)

2A 2.0MHz 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

M9999-051707

May 2007

12 3 4 5 6 7...21

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