SA57022-25D datasheet(2/8 Pages) PHILIPS

Part #	SA57022-25D

Description	500 mA LDO with ON/OFF control and Vref bypass

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Manufacturer	PHILIPS [NXP Semiconductors]

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Philips Semiconductors

Product data

SA57022-XX

500 mA LDO with ON/OFF control and Vref bypass

2

2003 Oct 13

GENERAL DESCRIPTION

The SA57022-XX has an extremely precise fixed output with a

typical accuracy of

±2%. It is designed to provide very low dropout

and ultra low noise with an optional Bypass pin, and fast transient

response. Supply current is reduced to zero (typical).

The SA57022-XX incorporates both over-temperature and

over-current protection. The SA57022-XX is stable with an output

capacitor of only 1.0

µF and has a maximum output current of

500 mA. It is available in the 7-pin small outline package (SOP002).

FEATURES

• Very low dropout voltage: 300 mV typ. (I

out = 500 mA)

• High precision output voltage: ±2%

• Output current capacity: 500 mA

• Low noise: 75 µV

rms typ. @ 20 Hz to 80 KHz, for Cn = 470 pF.

• Extremely good line regulation: 10 mV typical

• Extremely good load regulation: 20 mV typical

• Low temperature drift co-efficient to V

out: ±100 ppm/°C

• Internal current limit and thermal shut-down circuits

• Input voltage range: –0.3 V to 12 V

• Wide preset output voltage range: 1.8 V to 5 V

• Wide operating temperature range: –40 °C to +85 °C

APPLICATIONS

• Battery-operated systems

• Portable computers

• Cameras, VCRs and camcorders

• PCMCIA cards, modems, pagers

• Cellular/GSM/PHS phones

• Linear post-regulator for SMPS

• Instrumentation

SIMPLIFIED SYSTEM DIAGRAM

VIN

BYPASS

VOUT

GND

7

1

4

3

5

ON/OFF

R

CURRENT

LIMIT

REFERENCE

BIAS

DRIVER

THERMAL

SHUTDOWN

SL01527

Figure 1. Simplified system diagram.

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SA57022-25D Datasheet(PDF) 2 Page - NXP Semiconductors

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