LX8821 Microsemi Corporation, LX8821 Datasheet

LX8821

Manufacturer Part Number

LX8821

Description

Dual Channel 2.5a Low Dropout Regulator

Manufacturer

Microsemi Corporation

Datasheet

1.LX8821.pdf (6 pages)

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Rev. 1.1, 2005-03-09

linear regulator with one fixed and

one adjustable output featuring low-

dropout and high accuracy.

LX8821 accepts two supply voltage

inputs for the V

sections. This configuration reduces

power dissipation by operating the

regulator near dropout (V

VDO = 0.4V @ 2A) while providing

sufficient operating headroom for the

control logic.

2.5A independently with a regulator

design

efficiency by consuming minimal

ground

quiescent current to the load

trimmed at wafer level, enabling

precise output voltages, typically

r1% of its specified value.

IMPORTANT: For the most current data, consult Microsemi’s website: http://www.microsemi.com

The LX8821 is a positive-voltage

Each channel can supply up to

The internal voltage reference is

CONTROL

POWER

maximize

optimized

current

10µF

CONTROL

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

and

efficiency,

for

Note: Available in Tape & Reel. Append the letters “TR” to the part number. (i.e. LX8821CDF-TR)

0 to 100

and V

PWR

1µF

D E S C R I P T I O N

directing

(qC)

system

-V

POWER

OUT

LX8821

the

PWR

CONTROL

Output V1

proper startup regardless of the

level of V

LX8821 outputs remain off while

Current Protection are integrated

on-chip and operate independently

for each regulator output.

with a wide range of output

capacitance and ESR; typically

10PF tantalum or ceramic on the

outputs is sufficient.

power package with low thermal

resistance and ease of assembly

using surface mount technology.

1.5V

PWR

Power sequencing logic ensures

Thermal

The LX8821 regulator is stable

Microsemi uses a low profile

Microsemi Microelectronics Division

GND

P A C K A G E O R D E R I N F O

Part

P R O D U C T H I G H L I G H T

< 2.2V.

Microsemi

CTRL

ADJ

and

OUT1

OUT2

Adjustable

Output V2

or V

Short

PWR

UAL

33µF

Circuit

The

HANNEL

33µF

RODUCTION DATA

RoHS Compliant

LX8821CDF

2.5A L

7-Pin

Plastic S-Pak

S Two Independent Regulated

S Wide DC Supply Voltage of 3.0V to

S Accurate Output Voltages

S Low Tolerance Line (0.5%) and

S Max. Dropout of 0.6V at Rated

S Independent Thermal and Current

S Loop Stability Independent of

S Type SMT Power Package

GROUND

A P P L I C A T I O N S / B E N E F I T S

S ASIC, Memory, I/O

S Low Voltage Logic Supplies

S Active SCSI Terminators

S Battery Charging Circuits

S PC Peripherals

S Instrumentation

Outputs

10.0V

Load (0.5%) Regulation

Current

Limit Protection

Output Capacitor

OUT2

OUT1

OUT2

K E Y F E A T U R E S

1.25

ROPOUT

HEET

LX8821

EGULATOR

ADJ

Page 1

Related parts for LX8821

LX8821 Summary of contents

Page 1

... V CONTROL 1µF LX8821 T (qC 100 Note: Available in Tape & Reel. Append the letters “TR” to the part number. (i.e. LX8821CDF-TR) Copyright ¤ 2005 Rev. 1.1, 2005-03-09 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 ® UAL HANNEL Power sequencing logic ensures ...

Page 2

... can vary from 10qC/W to > 50qC ESCRIPTION Microsemi Microsemi Microelectronics Division LX8821 2. ROPOUT EGULATOR P S RODUCTION DATA HEET ...

Page 3

... T JSD Microsemi Microsemi Microelectronics Division LX8821 2. ROPOUT EGULATOR S RODUCTION DATA HEET 100qC except where A = 10PF (Tantalum), and LX8821 Min Typ Max 1.455 1.500 1.545 = 5mA 2.55 3 1.225 1.25 1.275 1.225 1.25 1.288 = 5mA 0.5 ...

Page 4

... IL1&IL2=5mA IL1&IL2=2. CH1 CH3 Step Load Response With Tantalum Cap (10µF) CH1 = V (50mA to 0.55A Step) O1 Microsemi Microsemi Microelectronics Division LX8821 2. ROPOUT EGULATOR S RODUCTION DATA HEET Dropout Voltage Iout=2.5A Iout=1A Iout=0.5A Tem perature (°C) Power On Ramp: Supply Ramp 2 ...

Page 5

... TM The LX8821 is part of a family of Dual LDO (Low Drop-Out) linear regulators in Microsemi’s S-PAK power package which offer maximum power dissipation in a low profile surface mount technology. The family includes combination fixed and adjustable versions. Each channel can supply up to 2.5A independently with a regulator design optimized for system efficiency by consuming minimal ground current and directing quiescent current to the load ...

Page 6

... MIN A 9.27 9.52 .365 B 8.89 9.14 .350 C 1.77 2.03 .070 D 7.49 7.74 .295 E 0.12 0.38 .005 F 0.58 0.84 .023 G 1.27 BSC 0.050 BSC H 0.79 1.04 .031 I 4.31 6.86 .170 J 0.03 0.13 .001 K 10.41 10.67 .410 Microsemi Microsemi Microelectronics Division LX8821 2. ROPOUT EGULATOR P S RODUCTION DATA HEET MAX .375 .360 .080 .305 .015 .033 .041 .270 .005 .420 Page 6 ...

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