MIC5245-3.0BM5 Micrel Semiconductor, MIC5245-3.0BM5 Datasheet

MIC5245-3.0BM5

Manufacturer Part Number

MIC5245-3.0BM5

Description

Manufacturer

Micrel Semiconductor

Datasheets

1.MIC5245-3.0BM5.pdf (12 pages)

2.MIC5245-2.85BM5.pdf (12 pages)

Specifications of MIC5245-3.0BM5

Case

SOT-23

Date_code

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

MIC5245-3.0BM5

Manufacturer:

MICREL

Quantity:

14 500

Company:

Meier Automation Equipment Co., Limited

Part Number:

MIC5245-3.0BM5

Manufacturer:

MICREL/麦瑞

Quantity:

20 000

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

MIC5245-3.0BM5 TR

Manufacturer:

MICREL

Quantity:

47 700

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

MIC5245-3.0BM5TR

Manufacturer:

MIC

Quantity:

38 762

Company:

Meier Automation Equipment Co., Limited

Part Number:

MIC5245-3.0BM5TR

Manufacturer:

MICREL/麦瑞

Quantity:

20 000

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Download datasheet (127Kb)

MIC5245

General Description

The MIC5245 is an efficient, precise CMOS voltage regulator

optimized for ultra-low-noise applications. The MIC5245 of-

fers better than 1% initial accuracy, extremely low dropout

voltage (typically 150mV at 150mA) and constant ground

current over load (typically 100 A). The MIC5245 provides a

very low noise output, ideal for RF applications where quiet

voltage sources are required. A noise bypass pin is also

available for further reduction of output noise.

Designed specifically for hand-held and battery-powered

devices, the MIC5245 provides a TTL logic compatible en-

able pin. When disabled, power consumption drops nearly to

zero.

The MIC5245 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

and power MSO-8 packages, the MIC5245 also offers a

range of fixed output voltages.

Not recommended for new designs, see MIC5255.

Typical Application

August 2002

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

EN (pin 3) may be

connected directly

o IN (pin 1).

Shutdown

Enable

MIC5245-x.xBM5

Ordering Information

Other voltages available. Contact Micrel for details.

Part Number

MIC5245-2.5BM5

MIC5245-2.7BM5

MIC5245-2.8BM5

MIC5245-2.85BM5

MIC5245-3.0BM5

MIC5245-3.1BM5

MIC5245-3.2BM5

MIC5245-3.3BM5

MIC5245-3.3BMM

(optional)

BYP

Ultra-Low-Noise Regulator Application

OUT

Marking

LS25

LS27

LS28

LS30

LS31

LS32

LS33

LS2J

Features

• Ultralow dropout—100mV @ 100mA

• Ultralow noise—30 V(rms)

• Stability with tantalum or ceramic capacitors

• Load independent, ultralow ground current

• 150mA output current

• Current limiting

• Thermal Shutdown

• Tight load and line regulation

• “Zero” off-mode current

• Fast transient response

• TTL-Logic-controlled enable input

Applications

• Cellular phones and pagers

• Cellular accessories

• Battery-powered equipment

• Laptop, notebook, and palmtop computers

• PCMCIA V

• Consumer/personal electronics

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

• High-efficiency linear power supplies

—

150mA Cap CMOS LDO Regulator

Voltage

2.85V

2.5V

2.7V

2.8V

3.0V

3.1V

3.2V

3.3V

OUT

SHUTDOWN

ENABLE

OUT

and V

Final Information

Junction Temp. Range

MIC5245

–40 C to +125 C

regulation/switching

(OPTIONAL)

BYP

MIC5245-3.3MM

SOT-23-5

Package

MSOP-8

MIC5245

Micrel

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