Datasheet > MIC2183_05

MIC2183_05

更新时间： 2024-11-11 10:57:23

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Low Voltage Synchronous Buck PWM Control IC

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MIC2183

Micrel, Inc.

MIC2183

Low Voltage Synchronous Buck PWM Control IC

General Description

Features

Micrel’s MIC2183 is a high efficiency PWM synchronous

buck control IC. With its wide input voltage range of 2.9V to

14V, the MIC2183 can be used to efficiently step voltages

down in 1- or 2-cell Li Ion battery powered applications, as

well as in fixed 3.3V, 5V, or 12V systems.

• Input voltage range: 2.9V to 14V

• >90% efficiency

• Oscillator frequency of 400kHz

• Frequency divide-by-two pin

• Frequency sync to 600kHz

• FreqOut oscillator output allows simple charge pump

implementation in low voltage systems

• Front edge blanking

Efficiencies over 90% are achievable over a wide range of

load conditions with the MIC2183’s PWM control scheme.

The operating frequency can be divided by two by raising the

• 5Ω output drivers (typical)

FREQ/2pintoV .Thisallowstheusertooptimizeefficiency

• Soft start

versus board space. It also allows the MIC2183 to be exter-

• PWM current mode control

nally synchronized to frequencies below its nominal 400KHz.

• 1µA shutdown current

The MIC2183 features an oscillator output, FreqOut, which

can be used to implement a simple charge pump in low

voltage applications. The output of the charge pump can be

• Cycle-by-cycle current limiting

• Frequency foldback short circuit protection

• Adjustable under-voltage lockout

• 16-pin narrow-body SOP and QSOP package options

fed into the gate drive power circuitry via the V P pin. This

featureallowsenhancedgatedrive,hencehigherefficiencies

Applications

at low input voltages.

MIC2183 also features a 1µA shutdown mode, and a pro-

grammable undervoltage lockout, making it well-suited for

portable applications.

• 3.3V to 2.5V/1.8V/1.5V conversion

• DC power distribution systems

• Wireless modems

• ADSL line cards

The MIC2183 is available in 16-pin SOP and QSOP packag-

ing options with a junction temperature range from -40°C to

+125°C.

• 1-and 2-cell Li Ion battery operated equipment

• Satellite Phones

Typical Application

Ω

MIC2183 EFFICIENCY

100

= 3.3V

OUT

= 2.5V

= 200kHz

OUTPUT CURRENT (A)

Adjustable Output Synchronous Buck Converter

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

M9999-042205

April 2005

12 3 4 5 6 7...12

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与MIC2183_05相关器件

型号	品牌	获取价格	描述	数据表
MIC2183BM	MICREL	获取价格	Low Voltage Synchronous Buck PWM Control IC Final Information
MIC2183BM	MICROCHIP	获取价格	Switching Controller, Current-mode, 0.001A, 440kHz Switching Freq-Max, BICMOS, PDSO16, SOP
MIC2183BMTR	MICROCHIP	获取价格	Switching Controller, Current-mode, 440kHz Switching Freq-Max, BICMOS, PDSO16, SOP-16
MIC2183BQS	MICREL	获取价格	Low Voltage Synchronous Buck PWM Control IC Final Information
MIC2183BQS	MICROCHIP	获取价格	Switching Controller, Current-mode, 0.001A, 440kHz Switching Freq-Max, BICMOS, PDSO16, QSO
MIC2183BQSTR	MICROCHIP	获取价格	Switching Controller, Current-mode, 440kHz Switching Freq-Max, BICMOS, PDSO16, QSOP-16
MIC2183YM	MICREL	获取价格	Low Voltage Synchronous Buck PWM Control IC
MIC2183YMTR	MICROCHIP	获取价格	SWITCHING CONTROLLER, 440kHz SWITCHING FREQ-MAX, PDSO16, LEAD FREE, SOP-16
MIC2183YM-TR	MICROCHIP	获取价格	SWITCHING CONTROLLER, 440kHz SWITCHING FREQ-MAX, PDSO16
MIC2183YQS	MICREL	获取价格	Low Voltage Synchronous Buck PWM Control IC

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