Datasheet > MIC2245YML-TR

MIC2245YML-TR

更新时间： 2023-06-15 00:00:00

品牌	Logo	应用领域
麦瑞 - MICREL		开关光电二极管
页数	文件大小	规格书
14页	558K
描述
2A SWITCHING REGULATOR, 4400kHz SWITCHING FREQ-MAX, PDSO10

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中文翻译

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MIC2245YML-TR 数据手册

MIC2245

4MHz PWM Synchronous Buck

Regulator with LDO Standby Mode

General Description

Features

The Micrel MIC2245 is a high efficiency 4MHz pulse

width modulated (PWM) synchronous buck (step-

down) regulator that features a LOWQ™ LDO

standby mode that draws only 18µA of quiescent

current. The MIC2245 allows an ultra-low noise,

small size, and high efficiency solution for portable

power applications.

• 2.7 to 5.5V supply/input voltage

• Light load LOWQ™ LDO mode

20µA quiescent current

Low noise, 75µVrms

• 4MHz PWM mode

Output current to 500mA

>92% efficiency

100% maximum duty cycle

In PWM mode, the MIC2245 operates with a

constant frequency 4MHz PWM control. Under light

load conditions, such as in system sleep or standby

modes, the PWM switching operation can be

disabled to reduce switching losses. In this light

load LOWQ™ mode, the LDO maintains the output

voltage and draws only 18µA of quiescent current.

The LDO mode of operation saves battery life while

not introducing spurious noise and high ripple as

experienced with pulse skipping or bursting mode

regulators.

• Adjustable output voltage option down to 1V

Fixed output voltage options available

• Ultra-fast transient response

• Uses a tiny 1µH inductor

• Fully integrated MOSFET switches

• Micropower shutdown operation

• Thermal shutdown and current limit protection

• Pb-free 10-pin 3mm x 3mm MLF™ package

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

The MIC2245 operates from a 2.7V to 5.5V input

voltage and features internal power MOSFETs that

can supply up to 500mA output current in PWM

mode. It can operate with a maximum duty cycle of

100% for use in low-dropout conditions.

Applications

• Cellular phones

• PDAs

• USB peripherals

The MIC2245 is available in the 10-pin 3mm x 3mm

MLF™ package with a junction operating range from

–40°C to +125°C.

Data sheet and support documentation can be found

on Micrel’s web site at: www.micrel.com.

____________________________________________________________________________________________________

Typical Application

1.8V

Efficiency

OUT

100

=3.2V

=3.6V

=4.2V

100 200 300 400 500

OUTPUT CURRENT (mA)

Adjustable Output Buck Regulator with LOWQ™ Mode

Patent Pending

LOWQ is a trademark of Micrel, Inc

MLF and MicroLeadFrame are 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

M9999-012406

www.micrel.com

January 2006

12 3 4 5 6 7...14

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与MIC2245YML-TR相关器件

型号	品牌	获取价格	描述	数据表
MIC2250	MICREL	获取价格	High-Efficiency Low EMI Boost Regulator
MIC2250	MICROCHIP	获取价格	The MIC2250 is a general purpose DC/DC boost switching regulator that features low noise
MIC2250_10	MICREL	获取价格	High-Efficiency Low EMI Boost Regulator
MIC2250_11	MICREL	获取价格	High-Efficiency Low EMI Boost Regulator
MIC2250-1YD5	MICREL	获取价格	High-Efficiency Low EMI Boost Regulator
MIC2250-2YD5	MICREL	获取价格	High-Efficiency Low EMI Boost Regulator
MIC2250YML	MICREL	获取价格	High-Efficiency Low EMI Boost Regulator
MIC2250YMLTR	MICREL	获取价格	暂无描述
MIC2250YML-TR	MICROCHIP	获取价格	3.5A SWITCHING REGULATOR, PDSO8
MIC2251	MICREL	获取价格	High-Efficiency Low EMI Boost Regulator

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