MIC5246-2.6BM5 查看數據表（PDF） - Micrel

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MIC5246-2.6BM5

150mA µCap CMOS LDO Regulator

Micrel 

MIC5246

Micrel

MIC5246

150mA µCap CMOS LDO Regulator

Preliminary Information

General Description

The MIC5246 is an efficient, precise CMOS voltage regulator

optimized for low-noise applications. The MIC5246 offers

better than 1% initial accuracy, extremely-low-dropout volt-

age (typically 150mV at 150mA) and constant ground current

(typically 85µA)over load . The MIC5246 features an error

flag that indicates an output fault condition such as overcurrent,

thermal shutdown and dropout. The MIC5246 provides a very

low noise output, ideal for RF applications where quiet

voltage sources are required.

Designed specifically for hand-held and battery-powered

devices, the MIC5246 provides a TTL-logic-compatible en-

able pin. When disabled, power consumption drops nearly to

zero.

The MIC5246 also works with low-ESR ceramic capacitors,

reducing the amount of board space necessary for power

applications, critical in hand-held wireless devices.

Key features include current limit, thermal shutdown, a push-

pull output for faster transient response, and an active clamp

to speed up device turnoff. Available in the IttyBitty™ SOT-23-5

package, the MIC5246 also offers a range of fixed output

voltages.

Features

• Error flag indicates fault condition

• Ultralow dropout—100mV @ 100mA

• Load independent, ultralow ground current: 85µA

• 150mA output current

• Current limiting

• Thermal Shutdown

• Tight load and line regulation

• “Zero” off-mode current

• Stability with low-ESR capacitors

• Fast transient response

• TTL-Logic-controlled enable input

Applications

• Cellular phones and pagers

• Cellular accessories

• Battery-powered equipment

• Laptop, notebook, and palmtop computers

• PCMCIA VCC and VPP regulation/switching

• Consumer/personal electronics

• SMPS post-regulator/dc-to-dc modules

• High-efficiency linear power supplies

Ordering Information

Part Number

Marking Voltage

MIC5246-2.6BM5

LT26

2.6V

MIC5246-2.7BM5

LT27

2.7V

MIC5246-2.8BM5

LT28

2.8V

MIC5246-2.85BM5

LT2J

2.85V

MIC5246-3.0BM5

LT30

3.0V

MIC5246-3.3BM5

LT33

3.3V

Other voltages available. Contact Micrel for details.

Junction Temp. Range

–40°C to +125°C

–40°C to +125°C

–40°C to +125°C

–40°C to +125°C

–40°C to +125°C

–40°C to +125°C

Package

SOT-23-5

SOT-23-5

SOT-23-5

SOT-23-5

SOT-23-5

SOT-23-5

Typical Application

47kΩ

VIN

MIC5246-x.xBM5

1

5

VOUT

2

Enable

Shutdown

3

EN

EN (pin 3) may be

connected directly

to IN (pin 1).

COUT

4

FLG

CFLG

Low-Noise Regulator Application

IttyBitty is a trademark of Micrel, Inc.

Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 944-0970 • http://www.micrel.com

June 2000

1

MIC5246

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