Microsemi Corporation LX8582A-33CP, LX8582A-00CV, LX8582A-00CP, LX8582A-33CV Datasheet
LIN DOC #:
A
8582
LX8582A-xx
THE INFINITE POWER OF INNOVATION
DESCRIPTION KEY FEATURES
The LX8582A series ICs are low
dropout three-terminal positive regulators with 8.5A rated output current.
Processor applications such as the
®
Cyrix
6x86TM & 6x86LTM, Pentium
®
Processor and Power PCTM applications
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.
Current limit is trimmed above 8.6A
to ensure adequate output current and
controlled short-circuit current. Onchip thermal limiting provides protection against any combination of
overload that would create excessive
junction temperatures.
The LX8582A series ICs are available
in both the through-hole versions of the
industry standard 3-pin TO-220 and TO247 power packages.
For use in VRE applications, the
LX1431 Programmable Reference in
conjunction with this family of regulators offers precision output voltage.
See the LX1431 data sheet for information on this product.
PRODUCT HIGHLIGHT
CYRIX 6X86 VOLTAGE SUPPLY
3.38V, 8.5A REGULATOR
8.5A LOW D
ROPOUT POSITIVE REGULATORS
P RODUCTION DATA SHEET
■■
■ THREE-TERMINAL AJUSTABLE OR FIXED
■■
OUTPUT
■■
■
GUARANTEED
■■
■■
■ OUTPUT CURRENT OF 8.5A
■■
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
APPLICATIONS
■ 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.
≤≤
≤ 1.3V HEADROOM AT 8.5A
≤≤
V
4.75V
IN
1500µF
6.3V
6MV1500GX
from Sanyo
V
This circuit is designed to have less than 130mV dynamic response to a 8.5A load transient.
IN
LX8582A
ADJ
= V
OUT
REF
Application of the LX8582A for the Cyrix 6x86 processor family.
R2
1 + + I
R1
ADJ
I
ADJ
= 50µA
R2
OUT
V
REF
R1
121
1%
R2
205
1%
3.38V at 8.5
2x 330µF, 6.3V
Oscon SA type
from Sanyo
-or4x 1500µF, 6.3V
6MV1500GX
from Sanyo
PACKAGE ORDER INFORMATION
T
(°C)
A
Dropout
Voltage
Plastic TO-220
P
3-pin
0 to 125 1.3V LX8582A-xxCP LX8582A-xxCV
"xx" refers to output voltage, please see table above.
Plastic TO-247
V
3-terminal
AVAILABLE OPTIONS PER PART #
Part #
LX8582A-00 Adjustable
LX8582A-33 3.3V
Other voltage options may be available —
Please contact factory for details.
Output
Voltage
Copyright © 1997
Rev. 1.1 1/97
FOR FURTHER INFORMATION CALL (714) 898-8121
11861 WESTERN AVENUE, GARDEN GROVE, CA. 92841
1
LX8582A-xx
PRODUCT DATABOOK 1996/1997
8.5A LOW D
RODUCTION DATA SHEET
P
ROPOUT POSITIVE REGULATORS
ABSOLUTE MAXIMUM RATINGS (Note 1)
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°C to 150°C
Lead Temperature (Soldering, 10 seconds) ............................................................. 300°C
Note 1. Exceeding these ratings could cause damage to the device. All voltages are with respect
to Ground. Currents are positive into, negative out of the specified terminal.
THERMAL DATA
P PACKAGE:
THERMAL RESISTANCE-JUNCTION TO TAB,
THERMAL RESISTANCE-JUNCTION TO AMBIENT,
θθ
θ
θθ
JT
θθ
θ
θθ
JA
V PACKAGE:
THERMAL RESISTANCE-JUNCTION TO TAB,
THERMAL RESISTANCE-JUNCTION TO AMBIENT,
Junction Temperature Calculation: TJ = TA + (P
numbers are guidelines for the thermal performance of the device/pc-board system.
The θ
JA
All of the above assume no ambient airflow.
θθ
θ
θθ
JT
θθ
θ
θθ
JA
x θ
).
D
JA
2.7°C/W
60°C/W
1.6°C/W
35°C/W
PACKAGE PIN OUTS
TAB IS V
OUT
3
2
1
P PACKAGE
* Pin 1 is GND for fixed voltage versions.
* Pin 1 is GND for fixed voltage versions.
(Top View)
TAB ON REVERSE SIDE IS V
3
2
1
V PACKAGE
(Top View)
OUT
V
IN
V
OUT
ADJ /
GND*
V
IN
V
OUT
ADJ /
GND*
2
Copyright © 1997
Rev. 1.1 1/97
PRODUCT DATABOOK 1996/1997
LX8582A-xx
8.5A LOW D
ROPOUT POSITIVE REGULATORS
P RODUCTION DATA SHEET
ELECTRICAL CHARACTERISTICS
(Unless otherwise specified, these specifications apply over the operating ambient temperatures for the LX8582A-xxC with 0°C ≤ TA ≤ 125°C; V
= 8.5A. Low duty cycle pulse testing techniques are used which maintains junction and case temperatures equal to the ambient temperature.)
3V; I
OUT
LX8582A-00 (Adjustable)
Parameter
Reference Voltage V
Symbol
REFIOUT
10mA ≤ I
Line Regulation (Note 2)
Load Regulation (Note 2)
Thermal Regulation
∆V
∆V
∆V
)
I
REF(VIN
)
(VIN - V
REF(IOUT
(Pwr)
TA = 25°C, 20ms pulse
OUT
Ripple Rejection (Note 3) V
C
Adjust Pin Current I
Adjust Pin Current Change ∆I
ADJ
ADJ
10mA ≤ I
Dropout Voltage ∆V ∆V
Minimum Load Current I
Maximum Output Current I
Temperature Stability ∆V
Long Term Stability ∆V
RMS Output Noise (% of V
)V
OUT
OUT(MIN)VIN
1.4V ≤ (V
OUT(MAX)
(T)
OUT
(t) TA = 125°C, 1000 hrs
OUT
OUT (RMS)TA
Test Conditions Units
= 10mA, TA = 25°C
≤ 8.5A, 1.5V ≤ (V
OUT
= 10mA, 1.5V ≤ (V
OUT
) = 3V, 10mA ≤ I
OUT
= 3.3V, f =120Hz, C
OUT
= 10µF, TA = 25°C, I
ADJ
≤ 8.5A, 1.5V ≤ (V
OUT
= 1%, I
REF
OUT
≤ 7V
- V
IN
OUT
= 25°C, 10Hz ≤ f ≤ 10kHz
= 8.5A
), V
IN
IN
≤ 7V
- V
- V
), V
IN
OUT
≤ 7V
OUT
), V
IN
IN
≤ 7V, P ≤ P
≤ 7V
IN
), V
OUT
≤ 8.5A
OUT
= 100µf Tantalum, VIN = 5V
OUT
= 8.5A
OUT
- V
IN
MAX
LX8582A-00
Min. Typ. Max.
1.238 1.250 1.262 V
1.225 1.250 1.275 V
0.035 0.2 %
0.1 0.5 %
0.01 0.02 %/W
65 83 dB
55 100 µA
0.2 5 µA
1.1 1.3 V
210mA
8.6 9.2 A
0.25 %
0.3 1 %
0.003 %
- V
=
IN
OUT
LX8582A-33 (3.3V Fixed)
Parameter
Output Voltage (Note 4) V
Line Regulation (Note 2) ∆V
Load Regulation (Note 2)
Thermal Regulation (Note 3)
Ripple Rejection (Note 3) C
Quiescent Current I
Dropout Voltage ∆V ∆V
Maximum Output Current I
Temperature Stability (Note 3) ∆V
Long Term Stability (Note 3) ∆V
RMS Output Noise (% of V
) (Note 3) V
OUT
Symbol
OUTVIN
(V
∆V
OUT(IOUT
∆V
OUT
OUT (MAX)VIN
OUT
OUT
OUT (RMS)TA
= 5V, I
4.75V ≤ VIN ≤ 10V, 0mA ≤ I
4.75V ≤ VIN ≤ 7V
OUT
)
4.75V ≤ V
IN
)
V
= 5V, 0mA ≤ I
IN
(Pwr)
TA = 25°C, 20ms pulse
= 100µF (Tantalum), I
OUT
0mA ≤ I
Q
= 1%, I
OUT
OUT
≤ 7V
(T)
(t) TA = 125°C, 1000 hours
= 25°C, 10Hz ≤ f ≤ 10kHz
Test Conditions Units
= 0mA, TA = 25°C
OUT
≤ 10V
IN
≤ I
≤ I
OUT
OUT (MAX)
, 4.75V ≤ VIN ≤ 10V
OUT (MAX)
= I
OUT
OUT (MAX)
≤ 8.5A, P ≤ P
OUT
= 8.5A, TA = 25°C
OUT
MAX
Note 2. Regulation is measured at constant junction temperature, using pulse testing with a low duty cycle. Changes in output voltage due to
heating effects are covered under the specification for thermal regulation.
Note 3. These parameters, although guaranteed, are not tested in production.
LX8582A-33
Min. Typ. Max.
3.267 3.3 3.333 V
3.235 3.3 3.365 V
16mV
210mV
515mV
0.01 0.02 % / W
60 83 dB
410mA
1.1 1.3 V
8.6 9.2 A
0.25 %
0.3 1 %
0.003 %
Copyright © 1997
Rev. 1.1 1/97
3
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