MIC37110 데이터 시트보기 (PDF) - Micrel

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MIC37110

High-Performance, Low-Noise, 1A LDOs

Micrel 

MIC37110/MIC37112

MIC37120/MIC37122

High-Performance, Low-Noise,

1A LDOs

General Description

The MIC37110/MIC37112 and MIC37120/MIC37122 are

high-performance, low-noise, low dropout regulators. Each

of these LDOs is capable of sourcing 1A output current,

offers high power supply rejection, and low output noise.

These general purpose LDOs are most suitable for

consumer applications such as multimedia devices, set-top

boxes, Blu-ray players, handheld devices, and gaming

consoles.

The MIC37112 and MIC37122 feature adjustable output

voltages while the MIC37110 and MIC37120 come in fixed

1.8V output voltage options. All devices feature 2% initial

output voltage accuracy, typical dropout of 230mV at 1A,

and low ground current.

This family of low-noise regulators is available in 2mm x

2mm Thin MLF®, SOIC-8 and SOT-223 packages and they

all have an operating junction temperature range of −40°C

to +125°C.

Data sheets and support documentation can be found on

Micrel’s web site at: www.micrel.com.

Features

• Input voltage range: 2.375V to 5.5V

• Output voltage adjustable down to 1.0V

(MIC37112/MIC37122)

• Stable with small, 2.2µF ceramic output capacitor

• 230mV typical dropout at 1A

• 1A minimum guaranteed output current

• ±2.0% initial accuracy

• Low ground current

• High PSRR: >60dB, up to 1kHz

• Output auto-discharge circuit (MIC37120/MIC37122)

• Thermal-shutdown and current-limit protection

Applications

• Mobile phones and consumer multimedia devices

• Set-top boxes and Blu-ray players

• Gaming consoles

• Tablets and handheld devices

• GPS receivers

___________________________________________________________________________________________________________

Typical Application

Dropout Voltage

vs. Output Current

400

VIN = 2.5V

VADJ = 0.95 * 1.0V

300

ADJUSTABLE OPTION

TA = 25ºC

200

100

0

0.0

0.2

0.4

0.6

0.8

1.0

OUTPUT CURRENT (A)

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

December 2012

M9999-121312-A

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