MIC5259-1.5BD5TR Micrel Semiconductor, MIC5259-1.5BD5TR Datasheet

MIC5259-1.5BD5TR

Manufacturer Part Number

MIC5259-1.5BD5TR

Description

Manufacturer

Micrel Semiconductor

Datasheet

1.MIC5259-1.5BD5TR.pdf (11 pages)

Specifications of MIC5259-1.5BD5TR

Date_code

05+

Packing_info

SOT-153

Current page: 1 of 11
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General Description

The MIC5259 is an efficient CMOS voltage regulator

optimized for low-noise applications. It offers 1.5% initial

accuracy, low dropout voltage (300mV at 300mA) and low

ground current (typically 105µA at light load). The

MIC5259 provides a very-low-noise output, ideal for RF

applications where a clean voltage source is required. The

MIC5259 has a high PSRR even at low supply voltages,

critical for battery operated electronics. A noise bypass pin

is also available for further reduction of output noise.

Designed speciﬁcally for handheld and battery-powered

devices, the MIC5259 provides a TTL-logic-compatible

enable pin. When disabled, power consumption drops to

nearly zero.

The

capacitors, reducing the amount of board space necessary

for power applications; critical issue in handheld wireless

devices.

Key features include current limit, thermal shutdown, faster

transient response, and an active clamp to speed up

device turn-off. The MIC5259 is available in the 6-pin

2mm × 2mm MLF

package in a wide range of output voltages.

Data sheets and support documentation can be found on

Micrel’s web site at www.micrel.com.

Typical Application

Shutdown

EN (pin 3) may be

connected directly

to IN (pin 1).

MLF and MicroLeadFrame are registered trademarks of Amkor Technology, Inc.

September 2006

Enable

Ceramic

= 1.0µF

MIC5259

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

MIC5259-x.xBD5/YD5

also

package and the 5-pin Thin SOT-23

works

with

OUT

Ceramic

BYP

OUT

low-ESR

= 0.01µF

= 1.0µF

SHUTDOWN

ceramic

ENABLE

= 1.0µF

Features

• Input voltage range: 2.7V to 6.0V

• PSRR = 70dB @ 1kHz

• Low output noise: 30µV(rms)

• Stability with ceramic output capacitors

• Low-dropout: 300mV @ 300mA

• High-output accuracy:

• Low quiescent current: 105µA

• 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

• Industrial portable electronics

• PC peripherals

300mA High PSRR, Low Noise µCap CMOS LDO

– 1.5% initial accuracy

– 3.0% over temperature

Ultra-Low Noise Regulator Application

MIC5259-x.xBML/YML

MIC5259

0.01µF

(optional)

BYP

M9999-091406

OUT

= 1.0µF

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