MIC3910125BM Micrel Semiconductor, MIC3910125BM Datasheet

MIC3910125BM

Manufacturer Part Number

MIC3910125BM

Description

SOP8

Manufacturer

Micrel Semiconductor

Datasheet

1.MIC39100-3.3BSTR.pdf (12 pages)

Specifications of MIC3910125BM

Date_code

08+

Current page: 1 of 12
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General Description

The MIC39100, MIC39101, and MIC39102 are 1A low-dropout

linear voltage regulators that provide low-voltage, high-current

output from an extremely small package. Utilizing Micrel’s pro-

prietary Super βeta PNP™ pass element, the MIC39100/1/2

offers extremely low dropout (typically 410mV at 1A) and low

ground current (typically 11mA at 1A).

The MIC39100 is a ﬁxed output regulator offered in the

SOT-223 package. The MIC39101 and MIC39102 are ﬁxed

and adjustable regulators, respectively, in a thermally en-

hanced power 8-lead SOIC package.

The MIC39100/1/2 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. A guaranteed maximum dropout voltage of 630mV over

all operating conditions allows the MIC39100/1/2 to provide

2.5V from a supply as low as 3.13V and 1.8V from a supply

as low as 2.43V.

The MIC39100/1/2 is fully protected with overcurrent limit-

ing, thermal shutdown, and reversed-battery protection.

Fixed voltages of 5.0V, 3.3V, 2.5V, and 1.8V are available

on MIC39100/1 with adjustable output voltages to 1.24V on

MIC39102.

For other voltages, contact Micrel.

Typical Applications

Super βeta PNP is a trademark of Micrel, Inc.

August 2005

MIC39100/39101/39102

3.3V

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

2.5V/1A Regulator

MIC39100

GND

OUT

10µF

tantalum

2.5V

SHUTDOWN

ENABLE

2.5V/1A Regulator with Error Flag

3.3V

MIC39101

GND

100k

OUT

FLG

Features

• Fixed and adjustable output voltages to 1.24V

• 410mV typical dropout at 1A

• 1A minimum guaranteed output current

• 1% initial accuracy

• Low ground current

• Current limiting and thermal shutdown

• Reversed-battery protection

• Reversed-leakage protection

• Fast transient response

• Low-proﬁle SOT-223 package

• Power SO-8 package

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

1A Low-Voltage Low-Dropout Regulator

Ideal for 3.0V to 2.5V conversion

Ideal for 2.5V to 1.8V conversion

10µF

tantalum

MIC39100/39101/39102

Error

Flag

Output

2.5V

SHUTDOWN

ENABLE

1.5V/1A Adjustable Regulator

2.5V

MIC39102

GND

OUT

ADJ

M9999-082505-B

10µF

tantalum

Micrel

1.5V

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