DESCRIPTION

KEY FEA TURES

s Three-Terminal Adjustable Or Fixed

Output

s Guaranteed

≤≤≤≤≤ 1.2V Headroom At 3A

(LX8587A)

s Guaranteed

≤≤≤≤≤ 1.3V Headroom At 3A

(LX8587)

s Output Current Of 3A

p Fast Transient Response

p 1% Voltage Reference Initial Accuracy

p Output Short Circuit Protection

p Built-In Thermal Shutdown

The LX8587/8587A series ICs are low

dropout three-terminal positive regulators

with a nominal 3A output current. Pen-

cations requiring fast transient response

are ideally suited for this product family.

The LX8587A is guaranteed to have

< 1.2V dropout at 3A and the LX8587

< 1.3V at the same current, making

them ideal to provide well-regulated out-

puts of 2.5V to 3.6V using a 5V input

supply. Fixed versions are also available

and specified in the Available Options

table below.

Current limit is trimmed above 3.1A to

ensure adequate output current and con-

trolled short-circuit current.

On-chip

thermal limiting provides protection

against any combination of overload con-

ditions that would create excessive junc-

tion temperatures.

The LX8587/87A family of products are

available in both TO-220 through-hole

as well as TO-263 surface-mount pack-

ages.

For higher current applications,

see the LX8585 and LX8584 data sheets.

APPLICA TIONS

s Pentium Processor Supplies

s Power PC Supplies

s Microprocessor Supplies

s Low Voltage Logic Supplies

s Post Regulator For Switching Supply

s ASIC & Low Voltage Chipset Supplies

s Graphics & Sound Cards

s Processor I/O Supply

PRODUCT HIGHLIGHT

Note: All surface-mount packages are available in Tape & Reel.

Append the letter "T" to part number. (i.e. LX8587A-00CDDT)

"xx" refers to output voltage, please see table above.

LX8587A

200

W

1500µF

6MV1500GX

2x 1500µF

Sanyo

6MV1500GX

V

4.75

3.3V/3A

121

W

The output capacitors must be low ESR and low ESL type for good transient response.

OF

LX8587-xx/8587A-xx

P ACKAGE ORDER INFORMA TION

T

Plastic TO-220

3-pin

P

Plastic TO-263

3-pin

DD

0 to 125

1.3V

LX8587-xxCP

LX8587-xxCDD

1.2V

LX8587A-xxCP

LX8587A-xxCDD

Dropout

Voltage

LX8587/87A-00

Adjustable

LX8587/87A-15

1.5V

LX8587/87A-33

3.3V

Part #

Output

Voltage

Other voltage options may be available —

Please contact factory for details.

Copyright © 1998

Rev. 1.2

3/98

1

IMPORTANT: For the most current data, consult LinFinity's web site: http://www.linfinity.com.