Datasheet > MIC2168_05

MIC2168_05

更新时间： 2024-01-09 02:39:43

品牌	Logo	应用领域
麦瑞 - MICREL		/
页数	文件大小	规格书
14页	1939K
描述
1MHz PWM Synchronous Buck Control IC

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MIC2168_05 数据手册

MIC2168

Micrel, Inc.

MIC2168

1MHz PWM Synchronous Buck Control IC

General Description

Features

The MIC2168 is a high-efﬁciency, simple to use 1MHz PWM

synchronous buck control IC housed in a small MSOP-10

package. The MIC2168 allows compact DC/DC solutions

with a minimal external component count and cost.

• 3V to 14.5V input voltage range

• Adjustable output voltage down to 0.8V

• Up to 95% efﬁciency

• 1MHz PWM operation

• Adjustable current-limit senses high-side N-Channel

MOSFET current

• No external current sense resistor

• Adaptive gate drive increases efﬁciency

• Ultra-fast response with hysteretic transient recovery

mode

• Overvoltage protection protects the load in fault

conditions

• Dual mode current limit speeds up recovery time

• Hiccup mode short-circuit protection

• Internal soft-start

The MIC2168 operates from a 3V to 14.5V input, without

the need of any additional bias voltage. The output voltage

can be precisely regulated down to 0.8V. The adaptive all

N-Channel MOSFET drive scheme allows efﬁciencies over

95% across a wide load range.

The MIC2168 senses current across the high-side N-Chan-

nel MOSFET, eliminating the need for an expensive and

lossy current-sense resistor. Current limit accuracy is main-

tained by a positive temperature coefﬁcient that tracks the

increasing R

of the external MOSFET. Further cost

DS(ON)

and space are saved by the internal in-rush-current limiting

digital soft-start.

• Dual function COMP and EN pin allows low-power shut-

down

• Small size MSOP 10-lead package

The MIC2168 is available in a 10-pin MSOP package, with a

wide junction operating range of –40°C to +125°C.

Applications

• Point-of-load DC/DC conversion

• Set-top boxes

All support documentation can be found on Micrel’s web site

at www.micrel.com.

• Graphic cards

• LCD power supplies

• Telecom power supplies

• Networking power supplies

• Cable modems and routers

Typical Application

V_IN= 5V

SD103BWS

100µF

4.7µF

0.1µF

1kΩ

VDD

BST

IRF7821

1.2µH

VIN

HSD

VSW

MIC2168

3.3V

COMP/EN

10kΩ

IRF7821

LSD

100pF

100nF

150µF x 2

GND

4kΩ

3.24kΩ

MIC2168 Adjustable Output 1MHz 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

M9999-040805

April 2005

12 3 4 5 6 7...14

中文翻译

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与MIC2168_05相关器件

型号	品牌	获取价格	描述	数据表
MIC2168A	MICREL	获取价格	1MHz PWM Synchronous Buck Control IC
MIC2168ABMM	MICREL	获取价格	1MHz PWM Synchronous Buck Control IC
MIC2168ABMMTR	MICROCHIP	获取价格	Switching Controller, Voltage-mode, 10A, 1100kHz Switching Freq-Max, PDSO10, MSOP-10
MIC2168AYMM	MICREL	获取价格	1MHz PWM Synchronous Buck Control IC
MIC2168AYMM	MICROCHIP	获取价格	SWITCHING CONTROLLER, 1100kHz SWITCHING FREQ-MAX, PDSO10
MIC2168AYMMTR	MICREL	获取价格	暂无描述
MIC2168AYMM-TR	MICROCHIP	获取价格	SWITCHING CONTROLLER, 1100kHz SWITCHING FREQ-MAX, PDSO10
MIC2168BMM	MICREL	获取价格	1MHz PWM Synchronous Buck Control IC
MIC2168BMM	MICROCHIP	获取价格	Switching Controller, Voltage-mode, 10A, 1100kHz Switching Freq-Max, PDSO10, MSOP-10
MIC2168MM	MICREL	获取价格	1MHZ PWM SYNCHRONOUS BUCK CONTROL IC

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