KD1083
7.5A LOW DROP POSITIVE VOLTAGE REGULATOR ADJUSTABLE AND FIXED
■THREE TERMINAL ADJUSTABLE OR FIXED OUTPUT VOLTAGE 1.5V,1.8V, 2.5V, 3.0, 3.3V
■OUTPUT CURRENT UP TO 7.5A
■1.4V MAX DROPOUT VOLTAGE AT FULL LOAD
■LINE REGULATION: MAX 0.2% OVER FULL TEMPERATURE RANGE
■LOAD REGULATION: MAX 0.5% OVER FULL TEMPERATURE RANGE
■OUTPUT CURRENT LIMIT
■THERMAL SHUTDOWN PROTECTION WITH HYSTERESIS
■WIDE OPERATING TEMPERATURE RANGE -40°C TO 125°C
■PINOUT COMPATIBILITY WITH STANDARD ADJUSTABLE VREG
DESCRIPTION
The KD1083 is a low drop linear voltage regulator, proposed both in adjustable and fixed version and designed for use in applications requiring output currents up to 7.5A. Dropout voltage is guaranteed not to exceed 1.4V at maximum output current while it decreases at lighter loads. The KD1083 also features an on-chip output current limit function and a thermal shutdown protection with hysteresis, preventing from excessive power dissipation in case of
SCHEMATIC DIAGRAM
PRELIMINARY DATA
TO-220 |
D2PAK |
insufficient heatsinking. The KD1083 is fully pin to pin compatible with the older 3-terminal adjustable regulators, but it has better performances in terms of drop and output voltage precision.
On chip trimming allows the regulator to reach a very tight output voltage tolerance, within ±2% at 25°C and 2% over the full temperature range. Unlike voltage regulators using a PNP transistor as series pass element in which a considerable fraction of the output current is wasted as quiescent current, the LD1083 quiescent current flows almost entirely into the load, improving the efficiency.
Only a 10µF minimum capacitor is required for output stability.
October 2002 |
1/11 |
This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to change without notice.
KD1083
ABSOLUTE MAXIMUM RATINGS
Symbol |
Parameter |
Value |
Unit |
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VIN |
DC Input to Output Voltage |
from -0.3 to 10 |
V |
IO |
Output Current |
Internally Limited |
A |
PD |
Power Dissipation |
Internally Limited |
W |
Tstg |
Storage Temperature Range |
-55 to +150 |
°C |
Top |
Operating Junction Temperature Range |
-40 to +125 |
°C |
Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these condition is not implied.
THERMAL DATA
Symbol |
Parameter |
TO-220 |
D2PAK |
Unit |
Rthj-case |
Thermal Resistance Junction-case |
3 |
3 |
°C/W |
Rthj-amb |
Thermal Resistance Junction-ambient |
50 |
62.5 |
°C/W |
CONNECTION DIAGRAM (top view)
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TO-220 |
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D2PAK |
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ORDERING CODES |
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TO-220 |
D2PAK(*) |
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OUTPUT VOLTAGE |
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KD1083V15 |
KD1083D2T15 |
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1.5V |
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KD1083V18 |
KD1083D2T18 |
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1.8V |
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KD1083V25 |
KD1083D2T25 |
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2.5V |
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KD1083V30 |
KD1083D2T30 |
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3.0V |
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KD1083V33 |
KD1083D2T33 |
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3.3V |
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KD1083V |
KD1083D2T |
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Adjustable |
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(*) Available in Tape & Reel with the suffix "R" for fixed version and "-R" for adjustable version.
TYPICAL APPLICATION CIRCUITS
R2 |
VO = VREF (1 + ¾¾) |
R1 |
2/11 |
KD1083
ELECTRICAL CHARACTERISTICS OF KD1083 (VIN=3V, CI = CO =10μF, Tj = -40 to 125°C, unless otherwise specified.)
Symbol |
Parameter |
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Test Conditions |
Min. |
Typ. |
Max. |
Unit |
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VREF |
Reference Voltage |
IO=10mA , (VIN-VO) = 3V, Tj = 25°C |
1.237 |
1.25 |
1.262 |
V |
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IO = 0.01 to 7.5A, (VIN-VO) = 1.5 to 5.75V |
1.225 |
1.25 |
1.275 |
V |
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(note1) |
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VREF |
Line Regulation |
IO=10mA, (VIN-VO) = 1.5 to 5.75V |
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0.015 |
0.2 |
% |
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VREF |
Load Regulation |
(VIN-VO)=3V, IO = 10mA to 7.5A |
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0.3 |
0.5 |
% |
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Vd |
Dropout Voltage |
VO=2%, IO=7.5A |
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1.05 |
1.4 |
V |
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Isc |
Short Circuit Current |
(VIN-VO) = 1.5 to 5.75V |
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8.5 |
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A |
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IO(min) |
Minimum Load Current |
(VIN-VO) = 1.5 to 5.75V |
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5 |
10 |
mA |
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IADJ |
Adjust Pin Current |
IO = 10mA to 7.5A |
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40 |
80 |
µA |
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IADJ |
Adjust Pin Current Change |
IO = 10mA to 7.5A, (VIN-VO) = 1.5 to 5.75V |
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0.2 |
5 |
µA |
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SVR |
Supply Voltage Rejection |
f = 120 Hz, CO = 25 μF, IO = 7.5A, |
60 |
75 |
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dB |
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(VIN-VO)=3V, VPP=1V |
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eN |
RMS Output Noise Voltage |
TA = 25°C, f =10Hz to 10kHz, I O=10mA, |
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0.003 |
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% |
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(% of VO) |
(V |
IN |
-V ) = 3V |
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O |
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TSHDN |
Thermal Shutdown |
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175 |
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°C |
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Threshold |
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THYST |
Thermal Shutdown |
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5 |
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°C |
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Hysteresis |
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NOTE 1: See short-circuit current curve for available output current at fixed dropout.
ELECTRICAL CHARACTERISTICS OF KD1083#15 (VIN=3.25V, CI = CO =10μF, Tj = -40 to 125°C, unless otherwise specified.)
Symbol |
Parameter |
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Test Conditions |
Min. |
Typ. |
Max. |
Unit |
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VO |
Output Voltage |
IO=10mA , (VIN-VO)=3V, Tj = 25°C |
1.485 |
1.5 |
1.515 |
V |
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IO = 0 to 7.5A, (VIN-VO) = 1.5 to 5.5V |
1.47 |
1.5 |
1.53 |
V |
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(note1) |
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VO |
Line Regulation |
IO=10mA, (VIN-VO) = 1.5 to 5.5V |
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0.015 |
0.2 |
% |
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VO |
Load Regulation |
(VIN-VO)=3V, IO = 0 to 7.5A |
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0.3 |
0.5 |
% |
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Vd |
Dropout Voltage |
VO=2%, IO=7.5A |
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1.05 |
1.4 |
V |
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Isc |
Short Circuit Current |
(VIN-VO) = 1.5 to 5.5V |
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8.5 |
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A |
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Id |
Quiescent Current |
(VIN-VO) = 1.5 to 5.5V, IO=0A |
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5 |
10 |
mA |
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SVR |
Supply Voltage Rejection |
f = 120 Hz, CO = 25 μF, IO = 7.5A, |
58.6 |
73.4 |
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dB |
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(VIN-VO) = 3V, VPP=1V |
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eN |
RMS Output Noise Voltage |
TA = 25°C, f =10Hz to 10kHz, I O=10mA, |
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0.003 |
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% |
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(% of VO) |
(V |
IN |
-V )=3V |
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O |
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TSHDN |
Thermal Shutdown |
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175 |
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°C |
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Threshold |
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THYST |
Thermal Shutdown |
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5 |
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°C |
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Hysteresis |
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NOTE 1: See short-circuit current curve for available output current at fixed dropout.
3/11
KD1083
ELECTRICAL CHARACTERISTICS OF KD1083#18(VIN=3.5V, CI = CO =10μF, Tj = -40 to 125°C, unless otherwise specified.)
Symbol |
Parameter |
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Test Conditions |
Min. |
Typ. |
Max. |
Unit |
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VO |
Output Voltage |
IO=10mA , (VIN-VO)=3V, Tj = 25°C |
1.782 |
1.8 |
1.818 |
V |
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IO = 0 to 7.5A, (VIN-VO) = 1.5 to 5.2V |
1.764 |
1.8 |
1.836 |
V |
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(note1) |
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VO |
Line Regulation |
IO=10mA, (VIN-VO) = 1.5 to 5.2V |
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0.015 |
0.2 |
% |
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VO |
Load Regulation |
(VIN-VO)=3V, IO = 0 to 7.5A |
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0.3 |
0.5 |
% |
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Vd |
Dropout Voltage |
VO=2%, IO=7.5A |
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1.05 |
1.4 |
V |
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Isc |
Short Circuit Current |
(VIN-VO) = 1.5 to 5.2V |
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8.5 |
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A |
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Id |
Quiescent Current |
(VIN-VO) = 1.5 to 5.2V, IO=0A |
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5 |
10 |
mA |
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SVR |
Supply Voltage Rejection |
f = 120 Hz, CO = 25 μF, IO = 7.5A, |
57 |
71.8 |
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dB |
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(VIN-VO) = 3V, VPP=1V |
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eN |
RMS Output Noise Voltage |
TA = 25°C, f =10Hz to 10kHz, I O=10mA, |
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0.003 |
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% |
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(% of VO) |
(V |
IN |
-V )=3V |
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O |
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TSHDN |
Thermal Shutdown |
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175 |
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°C |
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Threshold |
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THYST |
Thermal Shutdown |
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5 |
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°C |
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Hysteresis |
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NOTE 1: See short-circuit current curve for available output current at fixed dropout.
ELECTRICAL CHARACTERISTICS OF KD1083#25 (VIN=4.25V, CI = CO =10μF, Tj = -40 to 125°C, unless otherwise specified.)
Symbol |
Parameter |
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Test Conditions |
Min. |
Typ. |
Max. |
Unit |
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VO |
Output Voltage |
IO=10mA , (VIN-VO)=3V, Tj = 25°C |
2.475 |
2.5 |
2.525 |
V |
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IO = 0 to 7.5A, (VIN-VO) = 1.5 to 4.5V |
2.45 |
2.5 |
2.55 |
V |
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(note 1) |
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VO |
Line Regulation |
IO=10mA, (VIN-VO) = 1.5 to 4.5V |
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0.015 |
0.2 |
% |
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VO |
Load Regulation |
(VIN-VO)=3V, IO = 0 to 7.5A |
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0.3 |
0.5 |
% |
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Vd |
Dropout Voltage |
VO=2%, IO=7.5A |
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1.05 |
1.4 |
V |
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Isc |
Short Circuit Current |
(VIN-VO) = 1.5 to 4.5V |
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8.5 |
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A |
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Id |
Quiescent Current |
(VIN-VO) = 1.5 to 4.5V, IO=0A |
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5 |
10 |
mA |
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SVR |
Supply Voltage Rejection |
f = 120 Hz, CO = 25 μF, IO = 7.5A, |
54.1 |
68.9 |
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dB |
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(VIN-VO) = 3V, VPP=1V |
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eN |
RMS Output Noise Voltage |
TA = 25°C, f =10Hz to 10kHz, I O=10mA, |
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0.003 |
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% |
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(% of VO) |
(V |
IN |
-V )=3V |
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O |
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TSHDN |
Thermal Shutdown |
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175 |
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°C |
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Threshold |
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THYST |
Thermal Shutdown |
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5 |
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°C |
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Hysteresis |
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NOTE 1: See short-circuit current curve for available output current at fixed dropout.
4/11