Datasheet > MIC2169_09

MIC2169_09

更新时间： 2022-11-20 19:09:41

品牌	Logo	应用领域
麦瑞 - MICREL		/
页数	文件大小	规格书
15页	202K
描述
500kHz PWM Synchronous Buck Control IC

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MIC2169_09 数据手册

MIC2169

Micrel

MIC2169

500kHz PWM Synchronous Buck Control IC

General Description

Features

TheMIC2169isahigh-efﬁciency,simpletouse500kHzPWM

synchronous buck control IC housed in a small MSOP-10

package. The MIC2169 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

• 500kHz PWM operation

• Adjustable current limit senses high-side N-Channel

MOSFET current

• No external current-sense resistor

• Adaptive gate drive increases efﬁciency

• Fast transient response

– Externally compensated

• Overvoltage protection protects the load in fault

conditions

The MIC2169 operates using a 3V to 14.5V input, without

the need for 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.

TheMIC2169sensescurrentacrossthehigh-sideN-Channel

MOSFET, eliminating the need for an expensive and lossy

current-sense resistor. Current limit accuracy is maintained

via a positive temperature coefﬁcient that tracks the increas-

• Dual mode current limit speeds up recovery time

• Hiccup mode short-circuit protection

• Small size MSOP 10-lead package

ing R

of the external MOSFET. Additional cost and

DS(ON)

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

digital soft-start.

Applications

The MIC2169 is available in a 10-pin MSOP package, with a

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

• Point-of-load DC/DC conversion

• Set-top boxes

• Graphic cards

• LCD power supplies

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

at: www.micrel.com.

• Telecom power supplies

• Networking power supplies

• Cable modems and routers

Typical Application

V_IN= 5V

SD103BWS

MIC2169 Efficiency

100μF

100

4.7μF

0.1μF

1kΩ

VDD

BST

IRF7821

2.5μH

VIN

HSD

VSW

MIC2169

3.3V

COMP/EN

10kΩ

IRF7821

V_IN= 5V

150pF

100nF

LSD

150μF x 2

V_OUT= 3.3V

4kΩ

GND

3.24kΩ

10 12 14 16

(A)

LOAD

MIC2169 Adjustable Output 500kHz 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

M9999-032409

March 2009

12 3 4 5 6 7...15

中文翻译

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与MIC2169_09相关器件

型号	品牌	获取价格	描述	数据表
MIC2169A	MICREL	获取价格	500kHz PWM Synchronous Buck Control IC
MIC2169A	MICROCHIP	获取价格	The MIC2169A is a high-efficiency, simple to use 500kHz PWM synchronous buck control I
MIC2169A_09	MICREL	获取价格	500kHz PWM Synchronous Buck Control IC
MIC2169ABMM	MICROCHIP	获取价格	Switching Controller, Voltage-mode, 550kHz Switching Freq-Max, PDSO10, MSOP-10
MIC2169ABMM	MICREL	获取价格	500kHz PWM Synchronous Buck Control IC
MIC2169AYMM	MICREL	获取价格	500kHz PWM Synchronous Buck Control IC
MIC2169AYMM	MICROCHIP	获取价格	SWITCHING CONTROLLER, 550kHz SWITCHING FREQ-MAX, PDSO10
MIC2169A-YMM	MICREL	获取价格	500kHz PWM Synchronous Buck Control IC
MIC2169AYMMTR	MICREL	获取价格	暂无描述
MIC2169AYMM-TR	MICROCHIP	获取价格	SWITCHING CONTROLLER, 550kHz SWITCHING FREQ-MAX, PDSO10

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