LX8383-00IV Microsemi Analog Mixed Signal Group, LX8383-00IV Datasheet

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LX8383-00IV

Manufacturer Part Number
LX8383-00IV
Description
IC REG LDO POS 7.5A ADJ TO247
Manufacturer
Microsemi Analog Mixed Signal Group
Datasheet

Specifications of LX8383-00IV

Regulator Topology
Positive Adjustable
Voltage - Output
Adjustable
Voltage - Input
Up to 10V
Voltage - Dropout (typical)
1.2V @ 7.5A
Number Of Regulators
1
Current - Output
7.5A (Min)
Operating Temperature
-25°C ~ 125°C
Mounting Type
Through Hole
Package / Case
TO-247
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Current - Limit (min)
-
T
Copyright © 1996
Rev. 1.0
H E
V
Application of the LX8383A for the standard voltage (non VRE) Pentium Processor motherboard
The LX8383/8383A/8383B series ICs are
positive regulators designed to provide
7.5A output current. All internal circuitry
is designed to operate down to a 1V in-
put-to-output differential, so the LX8383/
83A/83B can operate with greater effi-
ciency than previously available devices.
The dropout voltage for each product is
fully specified as a function of load cur-
rent. Dropout is guaranteed at a maxi-
mum of 1.3V for the LX8383A/83B and
1.5V for the LX8383, at maximum output
current, decreasing at lower load currents.
Fixed versions are also available and speci-
fied in the Available Options table below.
The LX8383B offers a tighter voltage ref-
erence tolerance: 0.8% initial accuracy and
1% over line, load and temperature. The
LX8383/83A have 1% initial accuracy and
IN
12/96
I
6MV1500GX
4.75V
N F I N I T E
from Sanyo
1500µF
6.3V
with less than 130mV dynamic response to a 7.5A load transient.
P
IN
O W E R
P R O D U C T H I G H L I G H T
-25 to 125
3.3V, 7.5A R
LX8383A
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
T
D E S C R I P T I O N
A
O F
(°C)
ADJ
11861 W
I
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
"xx" refers to output voltage, please see table above.
E G U L AT O R
Dropout
Voltage
2% over line, load and temperature.
pin-compatible with earlier 3-terminal
regulators, such as the 117 series prod-
ucts. While a 10µF output capacitor is
required on both input and output of these
new devices, this capacitor is generally
included in most regulator designs.
current flows into the load, thereby
increasing efficiency.
contrasts with PNP regulators, where up
to 10% of the output current is wasted as
quiescent current. The LX8383I/8383AI is
specified over the industrial temperature
range of -25°C to +125°C and the
LX8383C/8383AC/8383BC is specified
over the commercial range of 0°C to
+125°C.
OUT
ESTERN
1.5V
1.3V
1.3V
1.5V
1.3V
The LX8383/83A/83B series devices are
The LX8383/83A/83B series quiescent
121
1%
205
1%
A
VENUE
P
LX8383A-xxCP
LX8383B-xxCP
LX8383A-xxIP
Plastic TO-220
3-pin
LX8383-xxCP
LX8383-xxIP
, G
LX8383-xx/8383A-xx/8383B-xx
ARDEN
2x 330µF, 6.3V
Oscon SA type
from Sanyo
-or-
3x 1500µF, 6.3V
6MV1500GX
from Sanyo
7 . 5 A L
3.38V at 7.5A
This feature
G
ROVE
P
R O D U C T I O N
O W
, CA. 92841
V
LX8383A-xxCV
LX8383B-xxCV
LX8383A-xxIV
LX8383-xxCV
Plastic TO-247
3-terminal
D
LX8383-xxIV
R O P O U T
A
Part #
LX8383/83A/83B-00
LX8383/83A/83B-33
p 0.015% LINE REGULATION
p 0.15% LOAD REGULATION
VA I L A B L E
Other voltage options may be available —
THREE-TERMINAL ADJUSTABLE OR FIXED
OUTPUT VOLTAGE
GUARANTEED < 1.3V HEADROOM AT
7.5A (LX8383A/8383B)
GUARANTEED < 1.5V HEADROOM AT
7.5A (LX8383)
OUTPUT CURRENT OF 7.5A MINIMUM
EVALUATION BOARD AVAILABLE:
REQUEST LXE9001 EVALUATION KIT
PENTIUM
HIGH EFFICIENCY LINEAR REGULATORS
POST REGULATORS FOR SWITCHING
POWER SUPPLIES
BATTERY CHARGERS
CONSTANT CURRENT REGULATORS
CYRIX
AMD-K5
Please contact factory for details.
P
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
D
®
6x86
TM
A T A
®
PROCESSOR APPLICATIONS
O
TM
P T I O N S P E R
LIN D
S
R
E G U L A T O R S
H E E T
O C
Adjustable
Voltage
Output
#: 8383
3.3V
P
A R T
1
#

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LX8383-00IV Summary of contents

Page 1

... IN LX8383A V 4.75V IN 1500µF ADJ 6.3V 6MV1500GX from Sanyo Application of the LX8383A for the standard voltage (non VRE) Pentium Processor motherboard with less than 130mV dynamic response to a 7.5A load transient. T (° 125 -25 to 125 Copyright © 1996 11861 W Rev. 1.0 ...

Page 2

... LX8383-xx/8383A-xx/8383B- Power Dissipation .................................................................................. Internally Limited Input Voltage ................................................................................................................ 10V Input to Output Voltage Differential ........................................................................... 10V Operating Junction Temperature Plastic (P & V Packages) ....................................................................................... 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 ...

Page 3

... (Unless otherwise specified, these specifications apply over the operating ambient temperatures for the LX8383-xxC/8383A-xxC/8383B-xxC with 0°C T 125°C, the LX8383-xxI/8383A-xxI with -25°C A maintains junction and case temperatures equal to the ambient temperature.) LX8383-00/83A-00/83B-00 (Adjustable) Parameter Symbol Reference Voltage LX8383/83A-00 (Note 4) LX8383B-00 Line Regulation (Note 2) ...

Page 4

... LX8383-xx/8383A-xx/8383B- The LX8383/83A/83B 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°C. ...

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 LX8383/83A/83B 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 LX8383/83A/83B 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

... TTL 2N3904 1k FIGURE 6 — 5V REGULATOR WITH SHUTDOWN LX8383/83A/83B-33 OUT IN IN GND FIGURE 7 — FIXED 3.3V OUTPUT REGULATOR ) DROPOUT (MAX) Pentium is a registered trademark of Intel Corporation LX8383/83A/83B OUT IN ADJ R1 121 C1* 10µ 1.25V 1 + OUT R1 5V 100µF 365 1% 3.3V Min. 15µ ...

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