Datasheet > MIC2182

MIC2182

更新时间： 2024-11-12 14:54:39

品牌	Logo	应用领域
美国微芯 - MICROCHIP		/
页数	文件大小	规格书
28页	223K
描述
MIC2182 is a synchronous buck (step-down) switching regulator controller. An all N-Channel syn

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MIC2182 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

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与MIC2182相关器件

型号	品牌	获取价格	描述	数据表
MIC2182_04	MICREL	获取价格	High-Efficiency Synchronous Buck Controller
MIC2182-3.3BM	MICREL	获取价格	High-Efficiency Synchronous Buck Controller Final Information
MIC2182-3.3BM	MICROCHIP	获取价格	Switching Controller, Current-mode, 0.1A, 330kHz Switching Freq-Max, BICMOS, PDSO16, SOP-1
MIC2182-3.3BSM	MICROCHIP	获取价格	SWITCHING CONTROLLER, 330kHz SWITCHING FREQ-MAX, PDSO16
MIC2182-3.3BSM	MICREL	获取价格	High-Efficiency Synchronous Buck Controller Final Information
MIC2182-3.3BSMTR	MICREL	获取价格	SWITCHING CONTROLLER, 330kHz SWITCHING FREQ-MAX, PDSO16, SSOP-16
MIC2182-3.3BSM-TR	MICROCHIP	获取价格	SWITCHING CONTROLLER, 330kHz SWITCHING FREQ-MAX, PDSO16
MIC2182-3.3YM	MICROCHIP	获取价格	SWITCHING CONTROLLER, 330kHz SWITCHING FREQ-MAX, PDSO16
MIC2182-3.3YM	MICREL	获取价格	High-Efficiency Synchronous Buck Controller
MIC2182-3.3YMTR	MICREL	获取价格	SWITCHING CONTROLLER, 330kHz SWITCHING FREQ-MAX, PDSO16, LEAD FREE, SOP-16

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