LD49300 datasheet(1/20 Pages) STMICROELECTRONICS

部件名	LD49300

功能描述	3A Very low drop for low output voltage regulator

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制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

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1 / 20 page

December 2006

Rev. 2

1/20

20

LD49300

3A Very low drop for low output voltage regulator

Feature summary

■ Input voltage range:

VI = 1.4V to 5.5V

VBIAS = 3V to 6V

■ Stable with ceramic capacitor

■ ±1.5% initial tolerance

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

over temperature

■ Adjustable output voltage down to 0.8V

■ Ultra fast transient response (up to 10MHz

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

Description

The LD49300 is a high-bandwidth, low-dropout,

3.0A voltage regulator, ideal for powering core

voltages of low-power microprocessors. The

LD49300 implements a dual supply configuration

allowing for very low output impedance and very

fast transient response. The LD49300 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 1.4V to

5.5V and the bias supply requires between 3V

and 6V for proper operation. The LD49300 offers

fixed output voltages from 0.8V to 1.8V and

adjustable output voltages down to 0.8V.

The LD49300 requires a minimum output

capacitance for stability, and work optimally with

small ceramic capacitors.

Applications

■ Graphics processors

■ PC Add-In Cards

■ Microprocessor core voltage supply

■ Low voltage digital ICs

■ High Efficiency Linear power supplies

■ SMPS post regulators

www.st.com

PPAK

Order code

Part number

Package

Packaging

LD49300PT08R (1)

1.

Adjustable Version.

PPAK (Tape&Reel)

2500 parts per reel

LD49300PT10R

PPAK (Tape&Reel)

2500 parts per reel

LD49300PT12R

PPAK (Tape&Reel)

2500 parts per reel

类似零件编号 - LD49300

制造商	部件名	数据表	功能描述
STMicroelectronics	LD49300PT08R	678Kb / 20P	3 A very low drop-out voltage regulator 30-Jun-2010
	LD49300PT10R	678Kb / 20P	3 A very low drop-out voltage regulator 30-Jun-2010
	LD49300PT12R	678Kb / 20P	3 A very low drop-out voltage regulator 30-Jun-2010
	LD49300XX08	678Kb / 20P	3 A very low drop-out voltage regulator 30-Jun-2010
	LD49300XX10	678Kb / 20P	3 A very low drop-out voltage regulator 30-Jun-2010

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