Datasheet > MIC2179

MIC2179

更新时间： 2024-09-29 14:54:51

品牌	Logo	应用领域
美国微芯 - MICROCHIP		/
页数	文件大小	规格书
22页	1042K
描述
The Micrel MIC2179 is a 200kHz synchronous buck (step-down) switching regulator designed for h

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MIC2179 数据手册

MIC2179

1.5A Synchronous Buck Regulator

Features

General Description

• Input Voltage Range: +4.5V to +16.5V

The MIC2179 is a 200 kHz synchronous buck

(step-down) switching regulator designed for

high-efficiency, battery-powered applications.

• Dual-Mode Operation for High Efficiency (up to

96%):

- PWM Mode for > 150 mA Load Current

- Skip Mode for < 150 mA Load Current

• 150 mΩ Internal Power MOSFETs at 12V Input

• 200 kHz Preset Switching Frequency

• Low Quiescent Current

The MIC2179 operates from a 4.5V to 16.5V input and

features internal power MOSFETs that can supply up to

1.5A output current. It can operate with a maximum

duty cycle of 100% for use in low-dropout conditions. It

also features a shutdown mode that reduces quiescent

current to less than 5 μA.

- 1.0 mA in PWM Mode

The MIC2179 achieves high efficiency over a wide

output current range by operating in either PWM or skip

mode. The operating mode is externally selected,

typically by an intelligent system, which chooses the

appropriate mode according to operating conditions,

efficiency, and noise requirements. The switching

frequency is preset to 200 kHz and can be

synchronized to an external clock signal of up to

300 kHz.

- 600 μA in Skip Mode

- < 5 μA in Shutdown Mode

• Current-Mode Control

- Simplified Loop Compensation

- Superior Line Regulation

• 100% Duty Cycle for Low Dropout Operation

• Current Limit

• Thermal Shutdown

The MIC2179 uses current-mode control with internal

current sensing. Current-mode control provides

superior line regulation and makes the regulator control

loop easy to compensate. The output is protected with

pulse-by-pulse current limiting and thermal shutdown.

Undervoltage lockout turns the output off when the

input voltage is less than 4.5V.

• Undervoltage Lockout

Applications

• High-Efficiency, Battery-Powered Supplies

• Buck (Step-Down) DC/DC Converters

• Laptop Computers

The MIC2179 is packaged in a 20-lead SSOP package

with an operating temperature range of -40°C to +85°C.

• Cellular Telephones

• Handheld Instruments

Package Type

• Battery Chargers

MIC2179

20-Lead SSOP (SM)

(Top View)

PGND

20 PGND

PGND

VIN

PWM

PWRGD

BIAS

SYNC

SGND

COMP

SGND

 2021 Microchip Technology Inc.

DS20006284B-page 1

12 3 4 5 6 7...22

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与MIC2179相关器件

型号	品牌	获取价格	描述	数据表
MIC2179_09	MICREL	获取价格	1.5A Synchronous Buck Regulator
MIC2179-3.3BSM	MICREL	获取价格	1.5A Synchronous Buck Regulator
MIC2179-3.3BSMT&R	MICROCHIP	获取价格	Switching Regulator, Current-mode, 5.5A, 240kHz Switching Freq-Max, PDSO20, MO-150, SSOP-2
MIC2179-3.3YSM	MICREL	获取价格	1.5A Synchronous Buck Regulator
MIC2179-3.3YSM	ROCHESTER	获取价格	5.5A SWITCHING REGULATOR, 240kHz SWITCHING FREQ-MAX, PDSO20, LEAD FREE, MO-150, SSOP-20
MIC2179-3.3YSM	MICROCHIP	获取价格	5.5A SWITCHING REGULATOR, 240kHz SWITCHING FREQ-MAX, PDSO20
MIC2179-3.3YSM-TR	MICROCHIP	获取价格	5.5A SWITCHING REGULATOR, 240kHz SWITCHING FREQ-MAX, PDSO20
MIC2179-5.0BSM	MICROCHIP	获取价格	Switching Regulator, Current-mode, 5.5A, 240kHz Switching Freq-Max, PDSO20, MO-150, SSOP-2
MIC2179-5.0BSM	MICREL	获取价格	1.5A Synchronous Buck Regulator
MIC2179-5.0BSMT&R	MICROCHIP	获取价格	Switching Regulator, Current-mode, 5.5A, 240kHz Switching Freq-Max, PDSO20, MO-150, SSOP-2

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