LX8586-33

Manufacturer Part NumberLX8586-33
Description6A LOW DROPOUT POSITIVE REGULATORS
ManufacturerMICROSEMI [Microsemi Corporation]
LX8586-33 datasheet
 
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T
I
P
H E
N F I N I T E
O W E R
O F
D E S C R I P T I O N
The LX8586/86A series ICs are low
dropout three-terminal regulators with
a minimum of 6A output current.
Pentium
®
Processor, Power PC
TM
,
®
TM
TM
Cyrix
6x86
and AMD-K5
applica-
tions requiring fast transient response
are ideally suited for this product
family. The LX8586A is guaranteed to
have
< 1.1V at 6A and the LX8586 < 1.3V at
6A dropout voltage, 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.
P R O D U C T H I G H L I G H T
1.5V, 6A R
3.3V
From Silverbox
IN
Power Supply
1500µF
Sanyo
6MV1500GX
A
L X 8 5 8 6
P P L I C AT I O N O F
Note A: See application note, page 3.
T
(°C)
A
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
11861 W
Copyright © 1996
Rev. 1.0
12/96
6 A L
O W
I
P
N N O V A T I O N
R O D U C T I O N
Current limit is trimmed above 6.1A
to ensure adequate output current and
controlled short-circuit current.
On-chip thermal limiting provides
protection against any combination of
overload that would create excessive
junction temperatures.
The LX8586/86A series devices are
available in both through-hole versions
of the industry-standard, 3-pin TO-220
and TO-247 power packages.
Along with the standard µP supply
applications, the LX8586 series of
products are ideal for Pentium
®
Pro
Processor applications such as GTL+
Bus terminators (see application below).
E G U L AT O R
H.S. (Note A)
LX8586
1.5V/6A
To GTL+
OUT
Terminator
121
ADJ
4x 1500µF
±1%
Sanyo
6MV1500GX
24.3
±1%
1 . 5 V G T L + B
T
A S
U S
E R M I N AT O R
P A C K A G E O R D E R I N F O R M A T I O N
Plastic TO-220
Dropout
P
3-pin
Voltage
1.3V
LX8586-xxCP
1.1V
LX8586A-xxCP
"xx" refers to output voltage, please see table above.
A
, G
G
ESTERN
VENUE
ARDEN
ROVE
LIN D
O C
LX8586-xx/8586A-xx
D
P
R
R O P O U T
O S I T I V E
E G U L A T O R S
D
S
A T A
H E E T
K E Y F E A T U R E S
THREE-TERMINAL ADJUSTABLE OR FIXED
OUTPUT
GUARANTEED < 1.1V HEADROOM AT 6A
(LX8586A)
GUARANTEED < 1.3V HEADROOM AT 6A
(LX8586)
OUTPUT CURRENT OF 6A MINIMUM
p FAST TRANSIENT RESPONSE
p 1% VOLTAGE REFERENCE INITIAL
ACCURACY
p OUTPUT SHORT CIRCUIT PROTECTION
p BUILT-IN THERMAL SHUTDOWN
EVALUATION BOARD AVAILABLE:
REQUEST LXE9001 EVALUATION KIT
A P P L I C A T I O N S
GTL+ BUS TERMINATORS
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
CYRIX 6x86
TM
TM
TM
AMD-K5
AND AMD-K6
A
O
VA I L A B L E
P T I O N S P E R
Output
Part #
Voltage
LX8586/86A-00
Adjustable
LX8586/86A-33
3.3V
Other voltage options may be available —
Please contact factory for details.
Plastic TO-247
V
3-terminal
LX8586-xxCV
LX8586A-xxCV
, CA. 92841
#: 8586
P
#
A R T
1

LX8586-33 Summary of contents

  • Page 1

    ... The LX8586A is guaranteed to have < 1. and the LX8586 < 1. dropout voltage, 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 ...

  • Page 2

    ... LX8586-xx/8586A- 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

    ... LX8586-00 LX8586A-00 Minimum Load Current Maximum Output Current Temperature Stability Long Term Stability RMS Output Noise (% OUT LX8586-33/86A-33 (3.3V Fixed) Parameter Symbol Output Voltage Line Regulation (Note 2) Load Regulation (Note 2) Thermal Regulation (Note 3) Ripple Rejection (Note 3) Quiescent Current Dropout Voltage ...

  • Page 4

    ... Power Supply OVERLOAD RECOVERY Like almost all IC power regulators, the LX8586/86A regulators are equipped with Safe Operating Area (SOA) protection. The SOA circuit limits the regulator's maximum output current to progres- sively lower values as the input-to-output voltage difference increases ...

  • Page 5

    ... Output ripple will be twice as bad as it would be if the ADJ pin were to be bypassed to ground with a properly selected capacitor. OUTPUT VOLTAGE The LX8586/86A ICs develop a 1.25V reference voltage between the output and the adjust terminal (See Figure 2). By placing a resistor, R1, between these two terminals, a constant current is caused to flow through R1 and down through R2 to set the overall output voltage ...

  • Page 6

    ... DROPOUT (MAX) for the installed regulator. THERMAL CONSIDERATIONS The LX8586/86A regulators have internal power and thermal limiting circuitry designed to protect each device under overload conditions. For continuous normal load conditions, however, maximum junction temperature ratings must not be exceeded important to give careful consideration to all sources of thermal resistance from junction to ambient ...

  • Page 7

    ... OUT IN (Note A) ADJ 10µF 1k TTL 2N3904 Output 1k FIGURE 6 — 5V REGULATOR WITH SHUTDOWN LX8586-33/86A-33 OUT IN IN GND FIGURE 7 — FIXED 3.3V OUTPUT REGULATOR ) DROPOUT (MAX) Pentium is a registered trademark of Intel Corporation. Power trademark of International Business Machines Corporation. LX8586-xx/8586A- ...