MIC37100-1.5BM 查看數據表（PDF） - Micrel

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MIC37100-1.5BM

1A Low-Voltage µCap LDO

Micrel 

MIC37100/37101/37102

1A Low-Voltage µCap LDO

General Description

Features

The MIC37100, MIC37101, and MIC37102 are 1A low-

dropout, linear voltage regulators that provide low-voltage,

high-current output from an extremely small package.

Utilizing Micrel’s proprietary Super βeta PNP® pass

element, the MIC37100/01/02 offers extremely low dropout

(typically 280mV at 1A) and low ground current (typically

11mA at 1A).

The MIC37100 is a fixed output regulator offered in the

SOT-223 package. The MIC37101 and MIC37102 are

fixed and adjustable regulators, respectively, in a thermally

enhanced power 8-pin SOIC (small outline package) and

the SOT-223 package. The MIC37102 is also available in

the S-PAK power package, for applications that require

higher power dissipation or higher operating ambient

temperatures.

• Fixed and adjustable output voltages to 1.24V

• µCap Regulator, 10µF ceramic output capacitor stable

• 280mV typical dropout at 1A

– Ideal for 3.0V to 2.5V conversion

– Ideal for 2.5V to 1.8V, 1.65V or 1.5V conversion

• 1A minimum guaranteed output current

• 1% initial accuracy

• Low ground current

• Current limiting and thermal shutdown

• Reversed-leakage protection

• Fast transient response

• Low-profile SOT-223 package

• Power SO-8 package

The MIC37100/01/02 is ideal for PC add-in cards that

need to convert from standard 5V to 3.3V, 3.3V to 2.5V or

2.5V to 1.8V or lower. A guaranteed maximum dropout

voltage of 500mV over all operating conditions allows the

MIC37100/01/02 to provide 2.5V from a supply as low as

3V and 1.8V from a supply as low as 2.3V.

The MIC37100/01/02 is fully protected with overcurrent

limiting and thermal shutdown. Fixed output voltages of

1.5V, 1.65V, 1.8V, 2.5V and 3.3V are available on

MIC37100/01 with adjustable output voltages to 1.24V on

MIC37102.

Data sheets and support documentation can be found on

Micrel’s web site at: www.micrel.com.

• S-PAK package (MIC37102 only)

Applications

• LDO linear regulator for PC add-in cards

• PowerPC® power supplies

• High-efficiency linear power supplies

• SMPS post regulator

• Multimedia and PC processor supplies

• Battery chargers

• Low-voltage microcontrollers and digital logic

___________________________________________________________________________________________________________

Typical Application

VIN

3.3V

MIC37100

IN OUT

GND

2.5V

10F

ceramic

2.5V/1A Regulator

Dropout

vs. Output Current

350

300

2.5VOUT

250

200

150

3.3VOUT

100

50

00

0.25 0.5 0.75

1

OUTPUT CURRENT (A)

Super βeta PNP is a registered trademark of Micrel, Inc.

PowerPC is a registered trademark of IBM Corporation

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

September 2007

M9999-090607

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