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

LX8585-XX

Manufacturer Part Number

LX8585-XX

Description

4.6A Low Dropout Positive Regulators

Manufacturer

MICROSEMI [Microsemi Corporation]

Datasheet

1.LX8585-XX.pdf (10 pages)

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Rev. 2.2a, 2005-11-10

low dropout three-terminal regulators

with a minimum of 4.6A output

current.

Power PCTM applications requiring

fast transient response are ideally

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. Current limit is trimmed

above 4.6A to ensure adequate output

current and controlled

IMPORTANT: For the most current data, consult MICROSEMI’s website:

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

traces in order to achieve good transient response.

The LX8585/85A Series ICs are

220 µF

10V

Low ESR

from Sanyo

Pentium

3.50

3.38

OUT

LX8585A

75 & 166 MH

Part

ADJ

0.1 µF

50V

OUT

0 to 125

250pF

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

PPLICATION OF THE

Open

Note: Available in Tape & Reel. Append the letters “TR” to the part number. (i.e. LX8585-15CDD-TR)

Short

Processor

JP1

SGND FGND

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

LX1431

(°C)

Part

1k Ω

COL

1k Ω

D E S C R I P T I O N

P54C P

REF

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

0.01 µF

Dropout

Voltage

120 / 166MHz, VRE, 5V Cache

2.84k Ω

and

1.4V

1.2V

0.1%

LX8585A & LX1431

ROCESSORS

Typical Application

short-circuit current. On-chip thermal

limiting provides protection against any

possible overload that would create

excessive junction temperatures. The

LX8585/85A family is available in both

through-hole

versions of the industry standard 3-pin

TO-220 / TO-263 power packages.

Reference

products offer precision output voltage

and are ideal for use in VRE

applications (see application below).

For higher current applications, see the

LX8584 data sheet.

0.1%

330 µ F, 6.3V

Oscon Type

from Sanyo

The

Low ESR

JP1

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

21k

(See Table Below)

V O 4.6A

Integrated Products Division

SING

Transition DC: 0543

LX8585A-xxCP

LX8585-xxCP

RoHS Compliant

5V C

LX1431

Microsemi

http://www.microsemi.com

Plastic TO-220

3-Pin

and

PLACE IN µP SOCKET CAVITY

IN A

ACHE

and

1 µ F x 10

SMD

100 µ F x 6

AVX TYPE

LX8585A

10V

TPS

4.6A Low Dropout Positive Regulators

Programmable

surface-mount

Load

µP

Series

RODUCTION

LX8585A-xxCDD

Transition DC: 0535

LX8585-xxCDD

RoHS Compliant

Other voltage options may be available.

Please contact factory for details.

Plastic TO-263

3-Pin

LX8585-xx / LX858A-xx

Available Options Per Part Number

LX8585/85A-00

LX8585/85A-15

LX8585/85A-33

Part #

Three Terminal Adjustable or

Fixed Output

Guaranteed < 1.2V headroom

@ 4.6A (LX8585A)

Guaranteed < 1.4V headroom

@ 4.6A (LX8585)

Guaranteed < 1.3V Headroom

@ 3A

Output Current of 4.6A

Minimum

Fast Transient Response

1% Voltage Reference Initial

Accuracy

Output Short Circuit Protection

Built-In Thermal Shutdown

Pentium Processor Supplies

Power PC Supplies

Microprocessor Supplies

Low Voltage Logic Supplies

Battery Powered Circuit

Post Regulator for Switching

Supply

CYRIX® 6x86™ Supplies

AMD-K5™ Supplies

ATA

K E Y F E A T U R E S

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

HEET

Output Voltage

Adjustable

1.5V

3.3V

Page 1

Related parts for LX8585-XX

LX8585-XX Summary of contents

Page 1

... Plastic TO-220 P 3-Pin RoHS Compliant Transition DC: 0543 1.4V LX8585-xxCP 1.2V LX8585A-xxCP Microsemi Integrated Products Division LX8585-xx / LX858A- RODUCTION ATA HEET Three Terminal Adjustable or Fixed Output Guaranteed < 1.2V headroom @ 4.6A (LX8585A) Guaranteed < 1.4V headroom @ 4.6A (LX8585) Guaranteed < ...

Page 2

... A 60°C/W MBIENT JA , θ T 3.0°C θ A 60°C/W MBIENT JA x θ Microsemi Integrated Products Division LX8585-xx / LX858A- RODUCTION ATA HEET TAB is GND ADJ/GND ACKAGE (Top View) TAB is GND ...

Page 3

... T = 125°C, 1000hrs OUT 25°C, 10Hz < f < 10kHz OUT(RMS forced below its nominal value by 100mV. OUT Microsemi Integrated Products Division LX8585-xx / LX858A- RODUCTION ATA HEET ≤ ≤ T 70°C except where A LX8585/85A Min Typ Max 1 ...

Page 4

... Figure 3 – 5V Regulator With Shutdown LX8585-33/85A-33 IN OUT GND Figure 4 – Fixed 3.3V Output Regulator ) Microsemi Integrated Products Division LX8585-xx / LX858A- ATA HEET LX8585/85A OUT IN V ADJ R1 121Ω C2 100µ 1.25V 1 + ...

Page 5

... SOA circuit, based on the large input-to-output voltage across the regulator at the time the short circuit is removed from the output. Microsemi Integrated Products Division LX8585-xx / LX858A- ATA HEET Minumum Load ...

Page 6

... When the circuit is connected as shown in Figure 7, the parasitic resistance appears as its actual value, rather than the higher R LX8585/85A very small and ADJ Figure 7 – Connections For Best Load Regulation Microsemi Integrated Products Division LX8585-xx / LX858A- ATA HEET LX8585/85A OUT V OUT ADJ V ...

Page 7

... T 11W(2.7 C/W 1.0 J **Although the device can operate up to 150°C junction recommended for long term reliability to keep the junction temperature below 125°C whenever possible. Microsemi Integrated Products Division LX8585-xx / LX858A- ATA HEET = 5.0A OUT = 50° ΘCS ΘSA ...

Page 8

... K T 5.84 U 0.508 Note: 1. Dimensions do not include mold flash or protrusions; J these shall not exceed 0.155mm(.006”) on any side. Lead dimension shall not include solder coverage. Microsemi Integrated Products Division LX8585-xx / LX858A- ATA HEET I ILLIMETERS NCHES MAX MIN MAX 15.88 0.560 0.625 10 ...

Page 9

... 14. Note: 1. Dimensions do not include mold flash or protrusions; these shall not exceed 0.155mm(.006”) on any side. dimension shall not include solder coverage. Microsemi Integrated Products Division LX8585-xx / LX858A- ATA HEET I ILLIMETERS NCHES MAX MIN MAX 10.67 0.395 0.420 9 ...

Page 10

... Microsemi reserves the right to change the configuration and performance of the product and to discontinue product at any time. Copyright © 1997 Rev. 2.2a, 2005-11-10 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 LX8585-xx / LX858A-xx ® 4.6A Low Dropout Positive Regulators P RODUCTION ...

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