Document
LIN D O C #: 8382
LX8382-xx/8382A-xx
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DESCRIPTION The LX8382/8382A series ICs are positive regulators designed to provide 10A output current. All internal circuitry is designed to operate down to a 1V input-to-output differential, so the LX8382/82A can operate with greater efficiency than previously available devices. The dropout voltage for each product is fully specified as a function of load current. Dropout is guaranteed at a maximum of 1.4V for the LX8382 and 1.2V for the LX8382A at maximum output current, decreasing at lower load currents. Fixed versions are also available and specified in the Available Options table below. The LX8382/82A have 1% initial voltage reference accuracy and 2% over line, load and temperature. The LX8382/82A series devices are pin-compatible with earlier 3-terminal regulators, such as the 117 series products. 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. The LX8382/82A series quiescent current flows into the load, thereby increasing efficiency. This feature contrasts with PNP regulators, where up to 10% of the output current is wasted as quiescent current. The LX8382/82A-xxC is specified over the commercial range of 0°C to +125°C.
K E Y F E AT U R E S
s THREE-TERMINAL ADJUSTABLE OR FIXED OUTPUT VOLTAGE s GUARANTEED < 1.4V HEADROOM AT 10A (LX8382) s GUARANTEED < 1.2V HEADROOM AT 10A (LX8382A) s OUTPUT CURRENT OF 10A MINIMUM p 0.015% LINE REGULATION p 0.15% LOAD REGULATION s EVALUATION BOARD AVAILABLE: REQUEST LXE9001 EVALUATION KIT
A P P L I C AT I O N S
s PENTIUM® PROCESSOR APPLICATIONS s POST REGULATORS FOR SWITCHING POWER SUPPLIES s BATTERY CHARGERS s CONSTANT CURRENT REGULATORS s CYRIX® 6x86TM s AMD-K6 TM s HIGH-CURRENT MICROPROCESSORS
PRODUCT HIGHLIGHT
3.3V, 10A R E G U L AT O R
A VA I L A B L E O P T I O N S
VIN ≥ 4.75V
1500µF 6.3V 6MV1500GX from Sanyo
PER
PAR T #
IN
LX8382-xx
ADJ
OUT 121Ω 1%
3.1V at 10A
2x 330µF, 6.3V Oscon SA type from Sanyo -or3x 1500µF, 6.3V 6MV1500GX from Sanyo
Part #
LX8382/8382A-00 LX8382/8382A-33
Output Voltage
Adjustable 3.3V
Other voltage options may be available — Please contact factory for details.
178Ω 1%
Application of the LX8382 for a high-current microprocessor (e.g. AMD-K6) with less than 130mV dynamic response to a 7.5A load transient.
PA C K A G E O R D E R I N F O R M AT I O N TA (°C) 0 to 125 Dropout Voltage 1.4V 1.2V
TO-220 P Plastic 3-pin
LX8382-xxCP LX8382A-xxCP
TO-247 V Plastic 3-terminal
LX8382-xxCV LX8382A-xxCV
"xx" refers to output voltage, please see table above.
F O R F U R T H E R I N F O R M AT I O N C A L L ( 7 1 4 ) 8 9 8 - 8 1 2 1
Copyright © 1997 Rev. 1.0 8/97
11861 WESTERN A VENUE , G ARDEN G ROVE , CA. 92841
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PRODUCT DATABOOK 1996/1997
LX8382-xx
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A B S O L U T E M A X I M U M R AT I N G S
(Note 1)
PACKAGE PIN OUTS
TAB IS V OUT
3 2 1
Power Dissipation .................................................................................. Internally Limited Input Voltage ................................................................................................................ 10V Input to Output Voltage Differential ........................................................................... 10V Maximum Output Current ........................................................................................... 10A 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. Currents are positive into, negative out of the specified terminal.
VIN VOUT ADJ / GND*
P PACKAGE (Top View)
* Pin 1 is GND for fixed voltage versions.
TAB ON REVERSE SIDE IS VOUT
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T H E R MAL DATA
P PACKAGE: THERMAL RESISTANCE-JUNCTION TO TAB, θJT THERMAL RESISTANCE-JUNCTION TO AMBIENT, θ JA V PACKAGE: THERMAL RESISTANCE-JUNCTION TO TAB, θJT THERMAL RESISTANCE-JUNCTION TO AMBIENT, θ JA 1.6°C/W 35°C/W 2.7°C/W 60°C/W
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VIN VOUT ADJ / GND*
V PACKAGE (Top View)
* Pin 1 is GND for fixed voltage versions.
Junction Temperature Calculation: TJ = TA + (PD x θJA). The θ JA numbers are guidelines for the thermal performance of the device/pc-board system. All of the above assume no ambient airflow.
BLOCK D IA GR A M
VIN
Bias Circuit Thermal Limit Circuit Bandgap Circuit Control Circuit Output Circuit
VOUT
SOA Protection Circuit
ADJ or GND.