LD49300PT08R datasheet(1/20 Pages) STMICROELECTRONICS

Part #	LD49300PT08R

Description	3 A very low drop-out voltage regulator

PDF	20 Pages

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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1 / 20 page

June 2010

Doc ID 12861 Rev 3

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20

LD49300XX08

LD49300XX10, LD49300XX12

3 A very low drop-out voltage regulator

Features

■ Input voltage range:

–VI = 1.4 V to 5.5 V

–VBIAS = 3 V to 6 V

■ Stable with ceramic capacitor

■ ±1.5 % initial tolerance

■ Maximum dropout voltage (VI - VO) of 400 mV

over temperature

■ Adjustable output voltage down to 0.8 V

■ Ultra fast transient response (up to 10 MHz

bandwidth)

■ Excellent line and load regulation

specifications

■ Logic controlled shutdown option

■ Thermal shutdown and current limit protection

■ Junction temperature range: - 25 °C to 125 °C

Applications

■ Graphics processors

■ PC add-in cards

■ Microprocessor core voltage supply

■ Low voltage digital ICs

■ High efficiency linear power supplies

■ SMPS post regulators

Description

The LD49300xx is a high-bandwidth, low drop-

out, 3.0 A voltage regulator, ideal for powering

core voltages of low-power microprocessors. The

LD49300xx implements a dual supply

configuration allowing for very low output

impedance and very fast transient response. The

LD49300xx requires a bias input supply and a

main input supply, allowing for ultra-low input

voltages on the main supply rail. The input supply

operates from 1.4 V to 5.5 V and the bias supply

requires between 3 V and 6 V for proper

operation. The LD49300xx offers fixed output

voltages from 0.8 V to 1.8 V and adjustable output

voltages down to 0.8 V. The LD49300xx requires a

minimum output capacitance for stability, and

works optimally with small ceramic capacitors.

PPAK

Table 1.

Device summary

Order codes

Package

Packaging

LD49300PT08R (1)

PPAK (Tape and reel)

2500 parts per reel

LD49300PT10R

PPAK (Tape and reel)

2500 parts per reel

LD49300PT12R

PPAK (Tape and reel)

2500 parts per reel

1.

Adjustable version.

www.st.com

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