MIC2205-1.58YMLTR Micrel Semiconductor, MIC2205-1.58YMLTR Datasheet

MIC2205-1.58YMLTR

Manufacturer Part Number

MIC2205-1.58YMLTR

Description

Manufacturer

Micrel Semiconductor

Datasheet

1.MIC2205-1.58YMLTR.pdf (16 pages)

Specifications of MIC2205-1.58YMLTR

Date_code

05+

Packing_info

3X3

Available stocks

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Manufacturer

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Price

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

MIC2205-1.58YMLTR

Manufacturer:

MICREL

Quantity:

2 870

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Meier Automation Equipment Co., Limited

Part Number:

MIC2205-1.58YMLTR

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MICREL/麦瑞

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General Description

The Micrel MIC2205 is a high efficiency 2MHz PWM

synchronous

features a LOWQ™ LDO standby mode that draws

only 18µA of quiescent current.

allows an ultra-low noise, small size, and high

efficiency solution for portable power applications.

In PWM mode, the MIC2205 operates with a

constant frequency 2MHz 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.

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.

The MIC2205 operates from 2.7V to 5.5V input and

features internal power MOSFETs that can supply

up to 600mA output current in PWM mode. It can

operate with a maximum duty cycle of 100% for use

in low-dropout conditions.

The MIC2205 is available in the 3mm x 3mm MLF-

10L package with a junction operating range from

–40°C to +125°C.

Data sheets and support documentation can be

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

____________________________________________________________________________________________________

Typical Application

LOWQ is a trademark of Micrel, Inc

March 2005

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

2.7V to 5.5V

Adjustable Output Buck Regulator with LOWQ™ Mode

GND

1µF

buck

0.1µF

LowQ

(step-down)

VIN

AVIN

LOWQ

BIAS

PGND

MIC2205

AGND

LDO

regulator

The MIC2205

In this light

100k

125k

2.2µH

that

100pF

2.2µF

GND

OUT

Features

• 2.7 to 5.5V supply voltage

• Light load LOWQ™ LDO mode

• 2MHz PWM mode

• Adjustable output voltage option down to 1V

• Ultra-fast transient response

• Stable with 1µF ceramic output capacitor

• Fully integrated MOSFET switches

• Micropower shutdown

• Thermal shutdown and current limit protection

• Pb-free 3mm x 3mm MLF-10L package

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

Applications

• Cellular phones

• PDAs

• USB peripherals

Regulator with LDO Standby Mode

2MHz PWM Synchronous Buck

18µA quiescent current

Low noise, 75µVrms

Output current to 600mA

>95% efficiency

100% maximum duty cycle

Fixed output voltage options available

MIC2205

www.micrel.com

M9999-031105

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