MIC4681

更新时间： 2024-11-18 22:51:23

品牌	Logo	应用领域
麦瑞 - MICREL		稳压器
页数	文件大小	规格书
19页	397K
描述
2A-Peak SuperSwitcher⑩ SOP-8 Buck Regulator

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MIC4681 数据手册

MIC4681

Micrel

MIC4681

2A-Peak SuperSwitcher™ SOP-8 Buck Regulator

Final Information

General Description

Features

The MIC4681 SuperSwitcher™ is an easy-to-use step-down

(buck) voltage-mode switching regulator. The 200kHz

MIC4681 achieves over 1A of continuous output current over

a 4V to 30V input range in an 8-lead SOPpackage . The

MIC4681 features a high 2.1A minimum current limit, making

the device ideal for pulsed current applications such as GSM

and TDMA cell phone battery chargers and power supplies.

The MIC4681 sustains an output of 4.2V/2A within a typical

GSM charging environment.

• SO-8 package with over 1A continuous output current

• Capable of 2A pulse charging for GSM applications

• All surface mount solution

• Only 4 external components required

• Fixed 200kHz operation

• Output adjustable down to 1.25V

• Internally compensated with fast transient response

• Wide 4V to 30V operating input voltage range

• Less than 6µA typical shutdown-mode current

• Up to 90% efficiency

The MIC4681 has an input voltage range of 4V to 30V, with

excellent line, load, and transient response. The regulator

performs cycle-by-cycle current limiting and thermal shut-

down for protection under fault conditions. In shutdown

mode, the regulator draws less than 6µA of standby current.

• Thermal shutdown

• Overcurrent protection

Applications

The MIC4681 SuperSwitcher™ regulator requires a mini-

mum number of external components and can operate using

a standard series of inductors and capacitors. Frequency

compensation is provided internally for fast transient re-

sponse and ease of use.

• Cellular phone battery charger

• Cellular phone power supply

• Simple 1A continuous high-efficiency step-down (buck)

regulator

• Replacement of a TO-220 and TO-263 designs

• Positive-to-negative converter (inverting buck-boost)

• Negative boost converter

The MIC4681 is available in the 8-lead SOP with a

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

• Higher output current regulator using external FET

Typical Applications

MIC4681BM

+5V to +30V

2.5V/1A

22µF

68µH

220µF

10V

3.01k

35V

SHUTDOWN

ENABLE

SHDN

2.94k

GND

5–8

B340A or

SS36

Power

SOP-8

Adjustable Regulator Circuit

SuperSwitcher is a trademark of Micrel, Inc.

Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 944-0970 • http://www.micrel.com

February 2001

MIC4681

12 3 4 5 6 7...19

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与MIC4681相关器件

型号	品牌	获取价格	描述	数据表
MIC4681_05	MICREL	获取价格	2A-Peak SuperSwitcher SOP-8 Buck Regulator
MIC4681BM	MICREL	获取价格	2A-Peak SuperSwitcher⑩ SOP-8 Buck Regulator
MIC4681BM	MICROCHIP	获取价格	Switching Regulator, Voltage-mode, 2.1A, 220kHz Switching Freq-Max, PDSO8, SOP-8
MIC4681YM	MICREL	获取价格	2A-Peak SuperSwitcher SOP-8 Buck Regulator
MIC4681YM	MICROCHIP	获取价格	2.1A SWITCHING REGULATOR, 220kHz SWITCHING FREQ-MAX, PDSO8
MIC4681YMTR	MICREL	获取价格	SWITCHING REGULATOR, 220kHz SWITCHING FREQ-MAX, PDSO8, LEAD FREE, SOP-8
MIC4681YM-TR	MICROCHIP	获取价格	SWITCHING REGULATOR, 220kHz SWITCHING FREQ-MAX, PDSO8
MIC4682	MICREL	获取价格	PRECISION CURRENT LIMIT SO-8 SUPERSWITCHER BUCK REGULATOR
MIC4682	MICROCHIP	获取价格	The MIC4682 is an easy-to-use step-down (buck) switch-mode voltage regulator. It feature
MIC4682_07	MICREL	获取价格	Precision Current Limit SOIC-8 SuperSwitcher⑩

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