LX8819

Microsemi

Integrated Products Division

11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570

Page 1

Dual Channel 1A Low Dropout Regulator

Copyright

© 2003

Revision 1.0a, 4/29/2005

TM

®

DESCRI PTI O N

The LX8819 is a dual channel

positive-voltage linear regulator. This

dual regulator has one fixed output

coupled with an adjustable output.

Each channel features a low dropout

and a high accuracy.

The LX8819 provides designers

with a flexible power management

solution, minimal printed circuit board

area, and shorter design cycles.

Each channel can supply up to one

amp independently with a regulator

design optimized for system efficiency

by consuming minimal ground current

while directing quiescent current to

the load.

The

LX8819

features

on-chip

trimming

of

the

internal

voltage

reference

enabling

precise

output

Voltages (typically ±1% of its specified

value)

while

the

Bipolar

output

transistor has a low dropout voltage

typical @ 1A).

Thermal and Short Circuit Current

Protection are integrated on-chip and

operate independently for each of the

regulator output.

The LX8819 regulator is stable with

a low-value output capacitor (typically

2.2µF on the outputs) allowing the

designers

flexibility

in

external

component selection.

Microsemi’s S-PAK and D-PAK

power

packages

enable

maximum

power dissipation and ease of assembly

using surface mount technology.

KEY FEATUR ES

Two Independent Regulated

Outputs

Accurate Output Voltages

Typical Dropout of 1.25V at 1A

and 1.1V at 500mA

Independent Thermal and

Current Limit Protection

Low Profile 5 Lead SMT Power

Package

Low Tolerance Load

Regulation

Wide DC Supply Voltage of

3.5V to 10V

Loop Stability Independent of

Output Capacitor Type

APPLICA T ION S

5V to 3.3V / ADJ Regulators

Hard Disk Drives, CD-ROMs

ADSL and Cable Modems

Battery Charging Circuits

Instrumentation

PC Peripherals

PRODUCT H I GHLIGHT

V

IN

= 5V

V

OUT2

= 3.3V/2.5V @ 1A

V

22 F

10 F

10 F

221

499

8819

GND

VOUT1

VIN

VOUT2

ADJ

PACKAGE ORDER I N FO

DF

Plastic S-PAK

5 pin

DT

Plastic D-PAK

5-Pin

°C)

(Pin 4)

(Pin 5)

RoHS Compliant

Transition DC: 0515

Adj.

3.3

LX8819-33CDF

LX8819-33CDT

0 to 125

Adj.

2.5

LX8819-25CDF

LX8819-25CDT

Note: Available in Tape & Reel. Append the letters “TR” to the part number. (i.e. LX8819-33CDT-TR)