Microsemi Corporation LX8382A-33CV, LX8382A-33CP, LX8382A-00CV, LX8382A-00CP, LX8382-33CV Datasheet
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LIN D O C #: 8382 |
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LX8382-xx/8382A-xx |
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1 0 A L O W D R O P O U T P O S I T I V E R E G U L A T O R S |
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T H E I N F I N I T E P O W E R O F I N N O V A T I O N |
P R O D U C T I O N D A T A S H E E T |
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D E S C R I P T I O N
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.
P R O D U C T H I G H L I G H T
K E Y F E AT U R E S
■THREE-TERMINAL ADJUSTABLE OR FIXED OUTPUT VOLTAGE
■GUARANTEED < 1.4V HEADROOM AT 10A (LX8382)
■GUARANTEED < 1.2V HEADROOM AT 10A (LX8382A)
■OUTPUT CURRENT OF 10A MINIMUM
p0.015% LINE REGULATION
p0.15% LOAD REGULATION
■EVALUATION BOARD AVAILABLE: REQUEST LXE9001 EVALUATION KIT
A P P L I C AT I O N S
■PENTIUM® PROCESSOR APPLICATIONS
■POST REGULATORS FOR SWITCHING POWER SUPPLIES
■BATTERY CHARGERS
■CONSTANT CURRENT REGULATORS
■CYRIX® 6x86TM
■AMD-K6TM
■HIGH-CURRENT MICROPROCESSORS
3.3V, 10A RE G U L AT O R
VIN ³ 4.75V |
IN |
LX8382-xx |
OUT |
3.1V at 10A |
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1500µF |
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ADJ |
121W |
2x 330µF, 6.3V |
6.3V |
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1% |
Oscon SA type |
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6MV1500GX |
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from Sanyo |
from Sanyo |
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-or- |
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3x 1500µF, 6.3V |
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178Ω |
6MV1500GX |
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1% |
from Sanyo |
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AVA I L A B L E O P T I O N S P E R PA R T #
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Part # |
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Output |
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Voltage |
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LX8382/8382A-00 |
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Adjustable |
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LX8382/8382A-33 |
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3.3V |
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Other voltage options may be available — Please contact factory for details.
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.
Copyright © 1997
Rev. 1.0 8/97
PA C K A G E O R D E R I N F O R M AT I O N
TA (°C) |
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Dropout |
P |
Plastic TO-220 |
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V |
Plastic TO-247 |
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Voltage |
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3-pin |
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3-terminal |
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0 to 125 |
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1.4V |
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LX8382-xxCP |
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LX8382-xxCV |
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1.2V |
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LX8382A-xxCP |
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LX8382A-xxCV |
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"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
11861 WESTERN AVENUE, GARDEN GROVE, CA. 92841 |
1 |
P R O D U C T D A T A B O O K 1 9 9 6 / 1 9 9 7
LX8382-xx
1 0 A L O W D R O P O U T P O S I T I V E R E G U L A T O R S
P R O D U C T I O N D A T A S H E E T
ABSOLUTE MAXIMUM RATINGS |
(Note 1) |
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Power Dissipation .................................................................................. |
Internally Limited |
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Input Voltage ................................................................................................................ |
10V |
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Input to Output Voltage Differential ........................................................................... |
10V |
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Maximum Output Current ........................................................................................... |
10A |
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Operating Junction Temperature |
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Plastic (P & V Packages) ....................................................................................... |
150°C |
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Storage Temperature Range ...................................................................... |
-65°C to 150°C |
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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, θJT |
2.7°C/W |
THERMAL RESISTANCE-JUNCTION TO AMBIENT, θJA |
60°C/W |
V PACKAGE: |
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THERMAL RESISTANCE-JUNCTION TO TAB, θJT |
1.6°C/W |
THERMAL RESISTANCE-JUNCTION TO AMBIENT, θJA |
35°C/W |
Junction Temperature Calculation: TJ = TA + (PD x θJA).
The θJA numbers are guidelines for the thermal performance of the device/pc-board system. All of the above assume no ambient airflow.
PACKAGE PIN OUTS
TAB IS VOUT
3 
VIN
2 
VOUT
1 
ADJ / GND*
P PACKAGE
(Top View)
* Pin 1 is GND for fixed voltage versions.
TAB ON REVERSE SIDE IS VOUT |
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3 |
VIN |
2 |
VOUT |
1 |
ADJ / GND* |
V PACKAGE
(Top View)
* Pin 1 is GND for fixed voltage versions.
BLOCK DIAGRAM
VIN
Bias |
Circuit |
Thermal |
Bandgap |
Control |
Output |
Limit Circuit |
Circuit |
Circuit |
Circuit |
VOUT
SOA Protection
Circuit
ADJ or |
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Current |
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GND* |
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Limit Circuit |
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* This pin GND for fixed voltage versions.
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Copyright © 1997 |
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Rev. 1.0 8/97 |
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P R O D U C T D A T A B O O K 1 9 9 6 / 1 9 9 7
LX8382-xx
1 0 A L O W D R O P O U T P O S I T I V E R E G U L A T O R S
P R O D U C T I O N D A T A S H E E T
E L E C T R I C A L C H A R A C T E R I S T I C S
(Unless otherwise specified, these specifications apply over the operating ambient temperatures for the LX8382/8382A-xxC with 0°C ≤ TA ≤ 125°C; VIN - VOUT = 3V; IOUT = 10A. Low duty cycle pulse testing techniques are used which maintains junction and case temperatures equal to the ambient temperature.)
LX8382-00 (Adjustable)
Parameter |
Symbol |
Test Conditions |
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LX8382-00 |
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Units |
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Min. |
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Typ. |
Max. |
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Reference Voltage (Note 4) |
VREF |
IOUT = 10mA, TA = 25°C |
1.238 |
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1.250 |
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1.262 |
V |
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10mA ≤ IOUT ≤ IOUT (MAX), 1.5V ≤ (VIN - VOUT), VIN ≤ 10V, P ≤ PMAX |
1.225 |
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1.250 |
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1.270 |
V |
Line Regulation (Note 2) |
VREF (VIN) |
1.5V ≤ (VIN - VOUT), VIN ≤ 7V |
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0.015 |
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0.2 |
% |
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Load Regulation (Note 2) |
VREF |
VOUT ≥ VREF, VIN - VOUT = 3V, 10mA ≤ IOUT ≤ 10A, TA = 25°C |
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0.15 |
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0.4 |
% |
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(IOUT) |
VIN - VOUT = 3V, 10mA ≤ IOUT ≤ 10A |
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0.3 |
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0.5 |
% |
Thermal Regulation |
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VOUT(Pwr) |
TA = 25°C, 20ms pulse |
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0.01 |
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0.02 |
%/W |
Ripple Rejection (Note 3) |
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VOUT = 5V, f =120Hz, COUT = 100µf Tantalum, VIN = 6.5V |
65 |
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83 |
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dB |
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CADJ = 10µF, TA = 25°C, IOUT = 10A |
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Adjust Pin Current |
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IADJ |
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55 |
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100 |
µA |
Adjust Pin Current Change (Note 4) |
IADJ |
10mA ≤ IOUT ≤ IOUT (MAX) , 1.5V ≤ (VIN - VOUT), VIN ≤ 10V |
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0.2 |
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5 |
µA |
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Dropout Voltage |
LX8382-00 |
V |
VREF = 1%, IOUT = 10A |
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1.2 |
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1.4 |
V |
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LX8382A-00 |
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VREF = 1%, IOUT = 10A |
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1.1 |
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1.2 |
V |
Minimum Load Current |
IOUT (MIN) |
VIN ≤ 10V |
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2 |
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10 |
mA |
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Maximum Output Current |
IOUT (MAX) |
(VIN - VOUT) ≤ 7V |
10 |
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12 |
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A |
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Temperature Stability (Note 3) |
VOUT (T) |
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0.25 |
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% |
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Long Term Stability |
(Note 3) |
VOUT (t) |
TA = 125°C, 1000 hours |
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0.3 |
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1 |
% |
RMS Output Noise (% of VOUT) (Note 3) |
VOUT (RMS) |
TA = 25°C, 10Hz ≤ f ≤ 10kHz |
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0.003 |
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% |
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LX8382-33 (3.3V Fixed)
Parameter |
Symbol |
Test Conditions |
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LX8382-33 |
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Units |
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Min. |
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Typ. |
Max. |
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Output Voltage (Note 4) |
VOUT |
VIN = 5V, IOUT = 0mA, TA = 25°C |
3.267 |
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3.3 |
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3.333 |
V |
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4.75V ≤ VIN ≤ 10V, 0mA ≤ IOUT ≤ 10A, P ≤ PMAX |
3.235 |
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3.3 |
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3.365 |
V |
Line Regulation (Note 2) |
VOUT (VIN) |
4.75V ≤ VIN ≤ 7V |
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1 |
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6 |
mV |
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Load Regulation (Note 2) |
VOUT (IOUT) |
VIN = 5V, 0mA ≤ IOUT ≤ IOUT (MAX) |
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5 |
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15 |
mV |
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Thermal Regulation |
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VOUT(Pwr) |
TA = 25°C, 20ms pulse |
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0.01 |
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0.02 |
% / W |
Ripple Rejection (Note 3) |
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COUT = 100µF (Tantalum), IOUT = 10A |
60 |
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83 |
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dB |
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Quiescent Current |
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IQ |
0mA ≤ IOUT ≤ IOUT (MAX) , 4.75V ≤ VIN ≤ 10V |
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4 |
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10 |
mA |
Dropout Voltage |
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LX8382-33 |
V |
VOUT = 1%, IOUT ≤ IOUT (MAX) , VIN ≤ 7V |
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1.4 |
V |
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LX8382A-33 |
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VOUT = 1%, IOUT ≤ IOUT (MAX) , VIN ≤ 7V |
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1.2 |
V |
Maximum Output Current |
IOUT (MAX) |
VIN ≤ 7V |
10 |
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12 |
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A |
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Temperature Stability (Note 3) |
VOUT (T) |
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0.25 |
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1 |
% |
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Long Term Stability |
(Note 3) |
VOUT (t) |
TA = 125°C, 1000 hours |
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0.3 |
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% |
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RMS Output Noise (% of VOUT) (Note 3) |
VOUT (RMS) |
TA = 25°C, 10Hz ≤ f ≤ 10kHz |
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0.003 |
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% |
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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. Note 4. See Maximum Output Current Section above.
Copyright © 1997 |
3 |
Rev. 1.0 8/97 |
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