MIC4744

更新时间： 2024-11-21 10:56:59

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	712K
描述
4 MHz Dual 2A Integrated Switch Buck Regulator

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MIC4744 数据手册

MIC4744

4 MHz Dual 2A Integrated Switch

Buck Regulator

General Description

Features

The Micrel MIC4744 is a high efficiency dual PWM buck

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

The MIC4744 operates at 4MHz. A proprietary internal

compensation technique allows a closed loop bandwidth of

over 200kHz.

•

2.9 to 5.5V supply voltage

4MHz PWM mode

2A Dual output

Greater than 90% efficiency

100% maximum duty cycle

Output voltage adjustable down to 0.6V

Ultra-fast transient response

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

MIC4744 allows efficiencies over 90%, reduces external

components count and eliminates the need for an

expensive current sense resistor.

Ultra-small external components

Stable with a 0.47µH inductor and a 10µF output

capacitor

The MIC4744 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 3mm x 3mm 16-pin MLF^®and 16-pin

TSSOP packages

The MIC4744 is available in the exposed pad 16-pin

3mm x 3mm MLF^®and ETSSOP-16 packages with

junction operating temperature ranging 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

0.0

0.4

0.8

1.2

1.6

2.0

OUTPUT CURRENT (A)

2A 4MHz 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-C

March 2009

12 3 4 5 6 7...23

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与MIC4744相关器件

型号	品牌	获取价格	描述	数据表
MIC4744YML	MICREL	获取价格	4 MHz Dual 2A Integrated Switch Buck Regulator
MIC4744YML	MICROCHIP	获取价格	4.3A DUAL SWITCHING CONTROLLER, 4400kHz SWITCHING FREQ-MAX, QCC16
MIC4744YMLTR	MICROCHIP	获取价格	4.3A DUAL SWITCHING CONTROLLER, 4400kHz SWITCHING FREQ-MAX, QCC16, 3 X 3 MM, GREEN, MLF-16
MIC4744YMLTR	MICREL	获取价格	4.3A DUAL SWITCHING CONTROLLER, 4400kHz SWITCHING FREQ-MAX, QCC16, 3 X 3 MM, GREEN, MLF-16
MIC4744YML-TR	MICROCHIP	获取价格	4.3A DUAL SWITCHING CONTROLLER, 4400kHz SWITCHING FREQ-MAX, QCC16
MIC4744YTSE	MICREL	获取价格	4 MHz Dual 2A Integrated Switch Buck Regulator
MIC4744YTSETR	MICROCHIP	获取价格	IC,SMPS CONTROLLER,VOLTAGE-MODE,CMOS,TSSOP,16PIN,PLASTIC
MIC4782	MICREL	获取价格	1.8 MHz Dual 2A Integrated Switch Buck Regulator
MIC4782YML	MICREL	获取价格	1.8 MHz Dual 2A Integrated Switch Buck Regulator
MIC4782YML	MICROCHIP	获取价格	SWITCHING CONTROLLER, PQCC16

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