LX8585-00 MICROSEMI [Microsemi Corporation], LX8585-00 Datasheet

LX8585-00

Manufacturer Part Number

LX8585-00

Description

4.6A LOW DROPOUT POSITIVE REGULATORS

Manufacturer

MICROSEMI [Microsemi Corporation]

Datasheet

1.LX8585-00.pdf (8 pages)

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Rev. 2.2

H E

The LX8585/85A Series ICs are low drop-

out three-terminal regulators with a mini-

mum of 4.6A output current. Pentium

Processor and Power PC

requiring fast transient response are ide-

ally suited for this product family. The

LX8585A is guaranteed to have < 1.2V

at 4.6A, while the LX8585 are specified

for 1.4V, making them ideal to provide

well regulated outputs of 2.5V to 3.6V

using a 5V input supply. Fixed versions

are also available and specified in the

Available Options table below.

ensure adequate output current and con-

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

Current limit is trimmed above 4.6A to

12/97

220µF

10V

Low ESR

from

Sanyo

N F I N I T E

Thick traces represent high current traces which must be low resistance / low

inductance traces in order to achieve good transient response.

Note: All surface-mount packages are available in Tape & Reel. Append the letter "T" to part number. (i.e. LX8585A-00CDDT)

LX8585A

75 & 166MH

3.50

3.38

0.1µF

50V

ADJ

OUT

11861 W

OUT

250pF

PPLICATION OF THE

O W E R

SGND

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

Open

Short

LX1431

JP1

COL

ESTERN

applications

FGND

0 to 125

D E S C R I P T I O N

P54C P

O F

REF

(°C)

0.01µF

75/90/100/133MHz, STND, 5V Cache

I N

VENUE

2.84k

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

0.1%

120/166MHz, VRE, 5V Cache

ROCESSORS

N N O V A T I O N

LX8585A & LX1431

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

I N I T Y

TYPICAL APPLICATION

, G

Dropout

0.1%

Voltage

trolled short-circuit current. On-chip

thermal limiting provides protection

against any possible overload that would

create excessive junction temperatures.

both through-hole and surface-mount

versions of the industry standard 3-pin

TO-220 / TO-263 power packages.

and LX8585A Series products offer pre-

cision output voltage and are ideal for

use in VRE applications (see application

below). For higher current applications,

see the LX8584 data sheet.

330µF, 6.3V

Oscon Type

from Sanyo

1.4V

1.2V

ARDEN

The LX8585/85A family is available in

The LX1431 Programmable Reference

Low ESR

JP1

21k

(See Table Below)

SING

ROVE

4.6A

I C R O E L E C T R O N I C S

5V C

LX8585A-xxCP

, CA. 92841, 714-898-8121, F

Plastic TO-220

3-pin

LX8585-xxCP

PLACE IN µP SOCKET CAVITY

IN A

ACHE

1µF x 10

SMD

4 . 6 A L

100µF x 6

AVX TYPE

10V

TPS

R O D U C T I O N

O W

LX8585-xx/8585A-xx

Load

LX8585A-xxCDD

µP

LX8585-xxCDD

Plastic T0-263

3-pin

R O P O U T

N C

p FAST TRANSIENT RESPONSE

p 1% VOLTAGE REFERENCE INITIAL

p OUTPUT SHORT CIRCUIT PROTECTION

p BUILT-IN THERMAL SHUTDOWN

VA I L A B L E

Other voltage options may be available —

Part #

LX8585/85A-00

LX8585/85A-15

LX8585/85A-33

: 714-893-2570

THREE-TERMINAL ADJUSTABLE OR FIXED

OUTPUT

GUARANTEED < 1.2V HEADROOM AT 4.6A

(LX8585A)

GUARANTEED < 1.4V HEADROOM AT 4.6A

(LX8585)

GUARANTEED < 1.3V HEADROOM AT 3A

OUTPUT CURRENT OF 4.6A MINIMUM

ACCURACY

PENTIUM PROCESSOR SUPPLIES

POWER PC SUPPLIES

MICROPROCESSOR SUPPLIES

LOW VOLTAGE LOGIC SUPPLIES

BATTERY POWERED CIRCUIT

POST REGULATOR FOR SWITCHING SUPPLY

CYRIX

AMD-K5

Please contact factory for details.

O S I T I V E

K E Y F E A T U R E S

A P P L I C A T I O N S

6x86

A T A

SUPPLIES

P T I O N S P E R

SUPPLIES

LIN D

E G U L A T O R S

H E E T

Adjustable

O C

Voltage

Output

1.5V

3.3V

#: 8585

A R T

Related parts for LX8585-00

LX8585-00 Summary of contents

Page 1

... Thick traces represent high current traces which must be low resistance / low inductance traces in order to achieve good transient response. T (° 125 Note: All surface-mount packages are available in Tape & Reel. Append the letter "T" to part number. (i.e. LX8585A-00CDDT Copyright © 1997 11861 W A Rev ...

Page 2

... LX8585-xx/8585A- Power Dissipation .................................................................................. Internally Limited Input Voltage ................................................................................................................ 10V Input to Output Voltage Differential ........................................................................... 10V Operating Junction Temperature Plastic (P, DD Package) ........................................................................................ 150°C Storage Temperature Range ...................................................................... -65° ...

Page 3

... LX8585-xxC/85A-xxC with 0° 3V 4.6A. Low duty cycle pulse testing techniques are used which maintains junction and case temperatures equal to the ambient temperature.) IN OUT OUT LX8585-00 / 8585A-00 (Adjustable) Parameter Symbol Reference Voltage LX8585/85A Line Regulation (Note 2) Load Regulation (Note 2) Thermal Regulation ...

Page 4

... LX8585-xx/8585A- LX8585-33 / 8585A-33 (3.3V Fixed) Parameter Output Voltage (Note 4) Line Regulation (Note 2) Load Regulation (Note 2) Thermal Regulation (Note 3) ...

Page 5

... The LX8585/85A Series ICs are easy to use Low-Dropout (LDO) voltage regulators. They have all of the standard self-protection features expected of a voltage regulator: short circuit protection, safe operating area protection and automatic thermal shutdown if the device temperature rises above approximately 165° ...

Page 6

... OUT ADJ V R1 REF I ADJ 50µ REF ADJ R1 regulators are three-terminal devices R2+ Actual parasitic line resistance Parasitic LX8585/85A Line Resistance OUT ADJ Connect R1 to Case of Regulator Connect R2 to Load Copyright © 1997 Rev. 2.2 . Peff 12/97 ...

Page 7

... T = 11W (2.7°C/W + 1.0°C/W + 3.0°C/W) + 50°C = 124° Although the device can operate up to 150°C junction recom- mended for long term reliability to keep the junction temperature below 125°C whenever possible. LX8585-xx/8585A- 2.8V 5.0A OUT = 50° 2.7°C/W for TO-220 ...

Page 8

... FIGURE 6 — 5V REGULATOR WITH SHUTDOWN LX8585-33/85A-33 V OUT IN IN GND FIGURE 7 — FIXED 3.3V OUTPUT REGULATOR ) DROPOUT (MAX LX8585/85A OUT IN ADJ R1 121 C1* 10µ Needed if device is far from filter capacitors 1.25V 1 + OUT R1 FIGURE 5 — ...

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