LD49150XX10 datasheet, PDF - EEWORLD Datasheet

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LD49150XX10: Description1.5 A very low drop for low output voltage regulator; File Size677KB，22 Pages; ManufacturerSTMicroelectronics; Websitehttp://www.st.com/

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LD49150XX10 Overview

1.5 A very low drop for low output voltage regulator

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LD49150XX08

LD49150XX10, LD49150XX12

1.5 A very low drop for low output voltage regulator

Features

■

Input voltage range:

– V

= 1.4 V to 5.5 V

– V

BIAS

= 3 V to 6 V

Stable with ceramic capacitor

±1.5 % initial tolerance

Maximum dropout voltage (V

- V

) of 200 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

PPAK

DFN6 (3x3 mm)

■

Description

The LD49150xx is a high-bandwidth, low-dropout,

1.5 A voltage regulator, ideal for powering core

voltages of low-power microprocessors. The

LD49150xx implements a dual supply

configuration allowing for very low output

impedance and very fast transient response. The

LD49150xx 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 LD49150xx offers fixed output

voltages from 0.8 V to 1.8 V and adjustable output

voltages down to 0.8 V. The LD49150xx 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

Table 1.

Device summary

Order codes

Output voltages

0.8 V

(2)

LD49150PU10R

LD49150PU12R

1.0 V

1.2 V

PPAK (tape and reel)

LD49150PT08R

LD49150PT10R

LD49150PT12R

1. Available on request.

2. Adjustable version.

DFN6 (tape and reel)

(1)

June 2010

Doc ID 13446 Rev 3

1/22

www.st.com

Contents

LD49150XX08, LD49150XX10, LD49150XX12

Contents

Typical application circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Alternative application circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Typical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Application hints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

8.1

8.2

8.3

8.4

8.5

8.6

8.7

8.8

8.9

8.10

Input supply voltage (V

) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Bias supply voltage (V

BIAS

) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

External capacitors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Output capacitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Minimum load current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Power sequencing recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Power dissipation/heatsinking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Heatsinking PPAK package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Adjustable regulator design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Enable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

2/22

Doc ID 13446 Rev 3

LD49150XX10 Related Products

	LD49150XX10	LD49150PU10R	LD49150XX08	LD49150XX12
Description	1.5 A very low drop for low output voltage regulator	1.5 A very low drop for low output voltage regulator	1.5 A very low drop for low output voltage regulator	1.5 A very low drop for low output voltage regulator

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