Datasheet > MIC2184

MIC2184

更新时间： 2023-12-06 20:07:31

品牌	Logo	应用领域
美国微芯 - MICROCHIP		/
页数	文件大小	规格书
12页	127K
描述
MIC2184 is a high efficiency PWM buck control IC. With its wide input voltage range of 2.9V to 1

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MIC2184 数据手册

MIC2184

Micrel, Inc.

MIC2184

Low Voltage Buck PWM Control IC

General Description

Features

Micrel’s MIC2184 is a high efficiency PWM buck control IC.

With its wide input voltage range of 2.9V to 14V, the MIC2184

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

• FrequOut oscillator output allows simple charge pump

implementation in low voltage systems

• 1.245V reference output

Efficiencies over 90% are achievable over a wide range of

load conditions with the MIC2184’s PWM control scheme.

The operating frequency can be divided by two by raising the

• Front edge blanking

FREQ/2pintoV . Thisallowstheusertooptimizeefficiency

• 5Ω output driver

versus board space. It also allows the MIC2184 to be exter-

• Soft start

nally synchronized to frequencies below its nominal 400KHz.

• PWM current mode control

• 1µA shutdown current

The MIC2184 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 SOIC and QSOP package options

fed into the gate drive power circuitry via the V P pin,

allowing enhanced gate drive, hence higher efficiencies,

despite low input voltages.

Applications

MIC2184 features a 1µA shutdown mode, and a program-

mableundervoltagelockout, makingitwellsuitedforportable

applications.

• 3.3V to 2.5V/1.8V/1.5V conversion

• DC power distribution systems

• Wireless Modems

The MIC2184 is available in 16 pin SOP and QSOP package

options with a junction temperture range range from –40°C

to +125°C.

• ADSL line cards

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

• Satellite Phones

Typical Application

V_IN= 3.3V

15mΩ

120µF (x2)

MIC2184 EFFICIENCY

VINP

6.3V

100

VINA

CSH

CSL

EN/UVLO

FreqOut

FREQ/2

VDD

OUTP

V_OUT

Si9803DY(x2)

2.5V @5A

MIC2184

4.7µH

= 3.3V

OUT

= 2.5V

= 200kHz

COMP

220µF(x2)

6.3V

PGND

VREF

OUTPUT CURRENT (A)

SYNC SGND

Adjustable Output 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MIC2184相关器件

型号	品牌	获取价格	描述	数据表
MIC2184_05	MICREL	获取价格	Low Voltage Buck PWM Control IC
MIC2184BM	MICREL	获取价格	Low Voltage Buck PWM Control IC Final Information
MIC2184BQS	MICREL	获取价格	Low Voltage Buck PWM Control IC Final Information
MIC2184BQSTR	MICROCHIP	获取价格	Switching Controller, Current-mode, 440kHz Switching Freq-Max, BICMOS, PDSO16, QSOP-16
MIC2184YM	MICREL	获取价格	Low Voltage Buck PWM Control IC
MIC2184YMTR	MICREL	获取价格	SWITCHING CONTROLLER, 440kHz SWITCHING FREQ-MAX, PDSO16, LEAD FREE, SOP-16
MIC2184YQS	MICREL	获取价格	Low Voltage Buck PWM Control IC
MIC2184YQS-TR	MICROCHIP	获取价格	SWITCHING CONTROLLER, 440kHz SWITCHING FREQ-MAX, PDSO16
MIC2185	MICREL	获取价格	Low Voltage Synchronous Boost PWM Control IC
MIC2185_05	MICREL	获取价格	Low Voltage Synchronous Boost PWM Control IC

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