LX8582A-33 MICROSEMI [Microsemi Corporation], LX8582A-33 Datasheet

LX8582A-33

Manufacturer Part Number

LX8582A-33

Description

8.5A LOW DROPOUT POSITIVE REGULATORS

Manufacturer

MICROSEMI [Microsemi Corporation]

Datasheet

1.LX8582A-33.pdf (7 pages)

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Rev. 1.1

H E

The LX8582A series ICs are low

dropout three-terminal positive regula-

tors with 8.5A rated output current.

Processor applications such as the

Cyrix

Processor and Power PC

requiring fast transient response are

ideally suited for this product family.

The LX8582A series products are

guaranteed to have < 1.3V at 8.5A

and are ideal to provide well-regulated

outputs of 2.5V to 3.6V using a 5V

input supply in the adjustable version,

or an output of 3.3V using a 5V input

supply in the fixed version.

This circuit is designed to have less than 130mV dynamic response to a 8.5A load transient.

Current limit is trimmed above 8.6A

6MV1500GX

1/97

4.75V

from Sanyo

N F I N I T E

6x86

1500µF

6.3V

OUT

Application of the LX8582A for the Cyrix 6x86 processor family.

& 6x86L

= V

REF

O W E R

1 +

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

, Pentium

3.38V, 8.5A R

Y R I X

applications

LX8582A

0 to 125

F O R F U R T H E R I N F O R M A T I O N C A L L ( 7 1 4 ) 8 9 8 - 8 1 2 1

D E S C R I P T I O N

O F

(°C)

+ I

ADJ

8 6 V

11861 W

ADJ

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

N N O V A T I O N

= 50µA

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

O LTA G E

OUT

Dropout

Voltage

to ensure adequate output current and

controlled short-circuit current. On-

chip thermal limiting provides protec-

tion against any combination of

overload that would create excessive

junction temperatures.

in both the through-hole versions of the

industry standard 3-pin TO-220 and TO-

247 power packages.

LX1431 Programmable Reference in

conjunction with this family of regula-

tors offers precision output voltage.

See the LX1431 data sheet for informa-

tion on this product.

E G U L AT O R

ESTERN

1.3V

The LX8582A series ICs are available

For use in VRE applications, the

REF

U P P LY

121

205

VENUE

LX8582A-xxCP

Plastic TO-220

3-pin

, G

ARDEN

8 . 5 A L

2x 330µF, 6.3V

Oscon SA type

from Sanyo

-or-

4x 1500µF, 6.3V

6MV1500GX

from Sanyo

3.38V at 8.5A

ROVE

R O D U C T I O N

O W

, CA. 92841

LX8582A-xxCV

Plastic TO-247

3-terminal

R O P O U T

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 #

LX8582A-00

LX8582A-33

THREE-TERMINAL AJUSTABLE OR FIXED

OUTPUT

GUARANTEED 1.3V HEADROOM AT 8.5A

OUTPUT CURRENT OF 8.5A

ACCURACY

EVALUATION BOARD AVAILABLE:

REQUEST LXE9001 EVALUATION KIT

CYRIX 6x86 & 6x86L APPLICATIONS

PENTIUM PROCESSOR SUPPLIES

POWER PC SUPPLIES

MICROPROCESSOR SUPPLIES

LOW VOLTAGE LOGIC SUPPLIES

POST REGULATOR FOR SWITCHING SUPPLY

LXE9001 EVALUATION BOARD FOR

PENTIUM APPLICATIONS AVAILABLE.

CONSULT FACTORY.

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

LX8582A-xx

A T A

P T I O N S P E R

LIN D

E G U L AT O R S

H E E T

Adjustable

O C

Voltage

Output

3.3V

#: 8582

A R T

Related parts for LX8582A-33

LX8582A-33 Summary of contents

Page 1

... POST REGULATOR FOR SWITCHING SUPPLY LXE9001 EVALUATION BOARD FOR PENTIUM APPLICATIONS AVAILABLE. CONSULT FACTORY Part # LX8582A-00 Adjustable LX8582A-33 Other voltage options may be available — Please contact factory for details. Plastic TO-247 V 3-terminal LX8582A-xxCV , CA. 92841 #: 8582 ...

Page 2

... LX8582A- Power Dissipation .................................................................................. Internally Limited Input Voltage ................................................................................................................ 10V Input to Output Voltage Differential ........................................................................... 10V Operating Junction Temperature Plastic (P Package) ................................................................................................ 150°C Storage Temperature Range ...................................................................... -65° ...

Page 3

... Dropout Voltage Minimum Load Current Maximum Output Current Temperature Stability Long Term Stability RMS Output Noise (% OUT LX8582A-33 (3.3V Fixed) Parameter Symbol Output Voltage (Note 4) Line Regulation (Note 2) Load Regulation (Note 2) Thermal Regulation (Note 3) Ripple Rejection (Note 3) Quiescent Current Dropout Voltage ...

Page 4

... Power Supply FIGURE 1 — DYNAMIC INPUT and OUTPUT TEST OVERLOAD RECOVERY Like almost all IC power regulators, the LX8582A is equipped with Safe Operating Area (SOA) protection. The SOA circuit limits the regulator's maximum output current to progressively lower values as the input-to-output voltage difference increases. By limiting the ...

Page 5

... OUT IN V OUT ADJ V R1 REF I ADJ 50µ REF ADJ three-terminal device not possible to R2+ Actual parasitic line resistance Parasitic LX8582A Line Resistance OUT ADJ Connect R1 to Case of Regulator Connect R2 to Load . Peff 5 ...

Page 6

... DROPOUT (MAX) for the installed regulator. THERMAL CONSIDERATIONS The LX8582A regulator has internal power and thermal limiting circuitry designed to protect the device under overload conditions. For continuous normal load conditions, however, maximum junc- tion temperature ratings must not be exceeded important to give careful consideration to all sources of thermal resistance from junction to ambient ...

Page 7

... V FIGURE 5 — 1. ADJUSTABLE REGULATOR LX8582A V OUT IN IN ADJ 121 1% 10µF 1k TTL 2N3904 1k FIGURE 6 — 5V REGULATOR WITH SHUTDOWN LX8582A-33 OUT IN IN GND FIGURE 7 — FIXED 3.3V OUTPUT REGULATOR ) DROPOUT (MAX) LX8582A- LX8582A OUT IN ADJ R1 121 C1* 10µ ...

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