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MIC2182YM

更新时间： 2024-11-11 10:57:23

品牌	Logo	应用领域
麦瑞 - MICREL		控制器
页数	文件大小	规格书
28页	224K
描述
High-Efficiency Synchronous Buck Controller

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中文翻译

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MIC2182YM 数据手册

MIC2182

Micrel

MIC2182

High-Efficiency Synchronous Buck Controller

General Description

Features

Micrel’s MIC2182 is a synchronous buck (step-down) switch-

ing regulator controller. An all N-channel synchronous archi-

tecture and powerful output drivers allow up to a 20A output

current capabilty. The PWM and skip-mode control scheme

allows efficiency to exceed 95% over a wide range of load

current, making it ideal for battery powered applications, as

well as high current distributed power supplies.

• 4.5V to 32V Input voltage range

• 1.25V to 6V Output voltage range

• 95% efficiency

• 300kHz oscillator frequency

• Current sense blanking

• 5Ω impedance MOSFET Drivers

• Drives N-channel MOSFETs

• 600µA typical quiescent current (skip-mode)

The MIC2182 operates from a 4.5V to 32V input and can

operate with a maximum duty cycle of 86% for use in low-

dropout conditions. It also features a shutdown mode that

reduces quiescent current to 0.1µA.

• Logic controlled micropower shutdown (I < 0.1µA)

• Current-mode control

• Cycle-by-cycle current limiting

• Built-in undervoltage protection

• Adjustable undervoltage lockout

• Easily synchronizable

• Precision 1.245V reference output

• 0.6% total regulation

• 16-pin SOP and SSOP packages

• Frequency foldback overcurrent protection

• Sustained short-circuit protection at any input voltage

• 20A output current capability

The MIC2182 achieves high efficiency over a wide output

current range by automatically switching between PWM and

skip mode. Skip-mode operation enables the converter to

maintain high efficiency at light loads by turning off circuitry

pertaining to PWM operation, reducing the no-load supply

current from 1.6mA to 600µA. The operating mode is inter-

nally selected according to the output load conditions. Skip

mode can be defeated by pulling the PWM pin low which

reduces noise and RF interference.

Applications

The MIC2182 is available in a 16-pin SOP (small-outline

package) and SSOP (shrink small-outline package) with an

operating range from –40°C to +85°C.

• DC power distribution systems

• Notebook and subnotebook computers

• PDAs and mobile communicators

• Wireless modems

• Battery-operated equipment

Typical Application

C11

22uf

35V

V_IN

MIC2182-3.3BSM

4.5V to 30V*

₁₁SD103BWS

VIN

VDD

4.7µF

16V

0.1µF

BST

0.1µF

100k

EN/UVLO HSD

Q2*

V_OUT

3.3V/4A

0.02Ω

10µH

Si4884

PWM

VSW

LSD

B140

1nF

Q1*

220uf

Si4884

10V ×2

PGND

CSH

GND

COMP

SYNC

C13, 1nF

0.1µF

VOUT

VREF

* 30V maximum input voltage limit is due

to standard 30V MOSFET selection.

2.2nF

SGND

0.1µF

See “Application Information” section for

5V to 3.3V/10A and other circuits.

GND

4.5V–30V* to 3.3V/4A Converter

Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com

M9999-042204

April 22, 2004

12 3 4 5 6 7...28

中文翻译

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与MIC2182YM相关器件

型号	品牌	获取价格	描述	数据表
MIC2182YSM	MICROCHIP	获取价格	SWITCHING CONTROLLER, 330kHz SWITCHING FREQ-MAX, PDSO16
MIC2182YSM	MICREL	获取价格	High-Efficiency Synchronous Buck Controller
MIC2182YSM-TR	MICROCHIP	获取价格	SWITCHING CONTROLLER, 330kHz SWITCHING FREQ-MAX, PDSO16
MIC2183	MICREL	获取价格	Low Voltage Synchronous Buck PWM Control IC Final Information
MIC2183	MICROCHIP	获取价格	MIC2183 is a high efficiency PWM synchronous buck control IC. With its wide input voltag
MIC2183_05	MICREL	获取价格	Low Voltage Synchronous Buck PWM Control IC
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

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