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MIC2251-2YD5

更新时间： 2024-10-01 07:17:03

品牌	Logo	应用领域
麦瑞 - MICREL		稳压器开关光电二极管
页数	文件大小	规格书
14页	870K
描述
High-Efficiency Low EMI Boost Regulator

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MIC2251-2YD5 数据手册

MIC2251

High-Efficiency Low EMI

Boost Regulator

General Description

Features

The MIC2251 is a general purpose DC/DC boost switching

regulator that features low noise, EMI reduction circuitry,

and high efficiency across a wide output current range.

• Over 80% efficient for a 300:1 load range

• 2.5V to 5.5V input voltage range

• Output voltage adjustable to 37V

The MIC2251 is optimized for noise-sensitive hand held

battery powered applications. A proprietary control method

allows low ripple across the output voltage and current

ranges. The MIC2251 incorporates a pseudo-random

dithering function to reduce EMI levels up to 10dB enabled

by the DITH pin.

• 52µA (typ) quiescent current

• Constant peak current control reduces output ripple

• EMI reduction circuitry

• Stable with small ceramic capacitors

• <1µA shutdown current

The MIC2251 is designed for use with inductor values from

4.7µH to 22µH, and is stable with ceramic capacitors from

1µF to 22µF.

• UVLO and thermal shutdown

• 8-pin 2mm x 2mm leadless MLF^®package (MIC2251)

• 5-pin Thin SOT-23 package (MIC2251-1 & -2)

• –40^°C to +125^°C junction temperature range

The MIC2251 attains a high peak efficiency up to 90% at

100mA and excellent light load efficiency of 80% at 1mA.

High power density is achieved with the MIC2251’s

internal 40V/2A rated switch, allowing it to power large

loads in a tiny footprint.

Applications

The MIC2251-1 is available in a 5-pin Thin SOT-23

package with dithering disabled. While the MIC2251-2 is

available in a 5-pin Thin SOT-23 package with dithering

enabled. The MIC2251 is available in a 8-pin 2mm x 2mm

MLF^®leadless package option with an operating junction

temperature range of –40°C to +125°C.

• LCD/OLED display bias supply

• CCD bias supply

• Mobile Phones, PDA, Media Players, GPS PND

• Haptic displays

• Local 5V, 15V, 24V rail

Data sheets and support documentation can be found on

Micrel’s web site at: www.micrel.com.

___________________________________________________________________________________________________________

Typical Application

MLF and MicroLeadFrame are registered trademarks of Amkor Technology, Inc.

Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com

M9999-041811-B

April 2011

12 3 4 5 6 7...14

中文翻译

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与MIC2251-2YD5相关器件

型号	品牌	获取价格	描述	数据表
MIC2251-2YD5TR	MICREL	获取价格	IC,SMPS CONTROLLER,CURRENT-MODE,TSOP,5PIN,PLASTIC
MIC2251YML	MICREL	获取价格	High-Efficiency Low EMI Boost Regulator
MIC2253	MICREL	获取价格	3.5A 1MHz High Efficiency Boost Regulator with OVP and Softstart
MIC2253	MICROCHIP	获取价格	The MIC2253 is a high power density 1MHz PWM DC/DC boost regulator. The 3.5A minimum swi
MIC2253_11	MICREL	获取价格	3.5A 1MHz High Efficiency Boost Regulator with OVP and Softstart
MIC2253-06YML	MICREL	获取价格	3.5A 1MHz High Efficiency Boost Regulator with OVP and Softstart
MIC2253-06YML-TR	MICROCHIP	获取价格	8A SWITCHING REGULATOR, 1200kHz SWITCHING FREQ-MAX, PDSO12
MIC22600	MICREL	获取价格	1MHz 6A Integrated Switch Synchronous Buck Regulator
MIC22600	MICROCHIP	获取价格	Not Recommended for New Designs; see MIC22705YML.?The MIC22600 is a high-efficiency, 6A, i
MIC22600_09	MICREL	获取价格	1MHz, 6A Integrated Switch Synchronous Buck Regulator

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