MIC5255-2.85YM5 Micrel Semiconductor, MIC5255-2.85YM5 Datasheet

MIC5255-2.85YM5

Manufacturer Part Number

MIC5255-2.85YM5

Description

Manufacturer

Micrel Semiconductor

Datasheets

1.MIC5255-2.85YM5.pdf (11 pages)

2.MIC5255-2.85YM5.pdf (11 pages)

3.MIC5255-2.85YM5.pdf (11 pages)

Specifications of MIC5255-2.85YM5

Case

153

Date_code

2009+

Available stocks

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Part Number

Manufacturer

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Price

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

MIC5255-2.85YM5

Manufacturer:

MICREL

Quantity:

6 627

Company:

Meier Automation Equipment Co., Limited

Part Number:

MIC5255-2.85YM5

Manufacturer:

MICREL

Quantity:

20 000

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

MIC5255-2.85YM5 TR

Manufacturer:

MICREL

Quantity:

9 870

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General Description

The MIC5255 is an efficient, precise CMOS voltage regulator

optimized for ultra-low-noise applications. It offers 1% initial

accuracy, extremely-low dropout voltage (135mV at 150mA)

and low ground current (typically 90 A). The MIC5255 pro-

vides a very-low-noise output, ideal for RF applications

where a clean voltage source is required. A noise bypass pin

is also available for further reduction of output noise.

Designed specifically for handheld and battery-powered de-

vices, the MIC5255 provides a TTL-logic-compatible enable

pin. When disabled, power consumption drops nearly to zero.

The MIC5255 also works with low-ESR ceramic capacitors,

reducing the amount of board space necessary for power

applications, critical in handheld wireless devices.

Key features include current limit, thermal shutdown, faster

transient response, and an active clamp to speed up device

turn-off. Available in the 6-pin 2mm 2mm MLF™ package,

the IttyBitty® SOT-23-5 package and the new Thin SOT-23-

5, which offers the same footprint as the standard IttyBitty®

SOT-23-5, but only 1mm tall. The MIC5255 offers a range of

output voltages.

All support documentation can be found on Micrel’s web

site at www.micrel.com.

Typical Application

IttyBitty is a registered trademark of Micrel, Inc.

Micro

August, 2004

MIC5255

LeadFrame and MLF are trademarks of Amkor Technology.

Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 474-1000• http://www.micrel.com

Shutdown

EN (pin 3) may be

connected directly

to IN (pin 1).

= 1.0 F

Ceramic

Enable

MIC5255-x.xBM5

Ultra-Low-Noise Regulator Application

OUT

Ceramic

BYP

OUT

= 0.01 F

= 1.0 F

SHUTDOWN

ENABLE

Features

• Input voltage range: 2.7V to 6.0V

• Thin SOT package: 1mm height SOT-23-5

• Ultra-low output noise: 30 V(rms)

• Stability with ceramic output capacitors

• Ultra-low dropout: 135mV @ 150mA

• High output accuracy:

• Low quiescent current: 90 A

• Tight load and line regulation

• TTL-Logic-controlled enable input

• “Zero” off-mode current

• Thermal shutdown and current limit protection

Applications

• Cellular phones and pagers

• Cellular accessories

• Battery-powered equipment

• Laptop, notebook, and palmtop computers

• Consumer/personal electronics

1.0% initial accuracy

2.0% over temperature

150mA Low Noise Cap CMOS LDO

MIC5255

MIC5255-x.xBML

(optional)

BYP

M0385-080204

OUT

Micrel

OUT

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