1/12December 2004
■THREE TERMINAL ADJUSTABL E OR FIXED
OUTP UT VOLTAGE 1.5V,1.8V, 2.5V, 3.0, 3.3V
■OUTPUT CURRENT UP T O 7.5A
■1.4V MAX DROPO U T VOLTAGE AT FULL
LOAD
■LINE REGULATION: MAX 0.2% OVER FULL
TEMPERATURE RANGE
■LOAD RE GULATION: MAX 0.5% OVER FULL
TEMPERATURE RANGE
■OUTPUT CURRENT LIMIT
■THERM AL SHUTDOWN PROT ECTION
WITH HYSTE R ESIS
■WIDE O PERATING TEMPERAT URE RANGE
-40°C TO 125°C
■PINOUT COMPATIBILITY WITH STANDARD
ADJUSTABL E VREG
DESCRIPTION
The KD1083 is a l ow drop linear voltage regulat or,
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-ch ip output current limit function and a therma l
shutdown protection with hysteresis, preventing
from excessive power dissipation in case of
insufficient heatsinking. The KD1083 is fully pin to
pin compat ible with the older 3-terminal adjust able
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.
KD1083
7.5A LOW DROP PO SITIVE VOLTAGE REGUL ATOR
ADJUSTABLE AND FIXED
Fi gure 1: S chematic Di agram
TO-220 D2PAK
Rev. 2
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Table 1: Absolute Maximum Ratings
Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these condition is
not implie d.
Table 2: Therm al Data
Fi gure 2: C onn ection Diagr am (top view)
Table 3: Order Codes
(* ) A vailable in Tape & Reel wit h the suf fix "R" for f i xed vers i on and "-R" for adjustable version.
Fi gure 3: Typica l Ap pli cat i on Ci rc uit s
Symbol Parameter Value Unit
VIN DC Input to Output Voltage from -0.3 to 10 V
IOOutput Current Internally Limited A
PDPower Dissipation Internally Limited W
Tstg Storage Temperature Range -55 to +150 °C
Top Operating Junction Temperature Range -40 to +125 °C
Symbol Parameter TO-220 D2PAK Unit
Rthj-case Thermal Resistance Junction-case 33°C/W
Rthj-amb Thermal Resistance Junction-ambient 50 62.5 °C/W
TO-220 D2PAK(*) OUTPUT VOLTAGE
KD1083V15 KD1083D2T15 1.5V
KD1083V18 KD1083D2T18 1.8V
KD1083V25 KD1083D2T25 2.5V
KD1083V30 KD1083D2T30 3.0V
KD1083V33 KD1083D2T33 3.3V
KD1083V KD1083D2T Adjustable
TO-220 D2PAK
R2
VO = VREF (1 + )
R1
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Table 4: Electrical Characteristics Of KD1083 (VIN=3V, CI = CO =10µF, Tj = -40 to 125°C, unless oth-
er wise specified.)
NOT E 1: See short-ci rcuit c urrent cu rv e for avail able ou tp ut current a t fi xed dropout.
Table 5: Electrical Characteristics Of KD1083#15 (VIN=3.25V, CI = CO =10µF, T j = -40 to 125°C,
unless otherwise specified.)
NOT E 1: See short-ci rcuit c urrent cu rv e for avail able ou tp ut current a t fi xed dropout.
Symbol Parameter Test Conditions Min. Typ. Max. Unit
VREF Reference Voltage IO=10mA, (VIN-VO) = 3V, Tj = 25°C 1.237 1.25 1.262 V
IO = 0.01 to 7.5A, (VIN-VO) = 1.5 to 5.75V
(note1) 1.225 1.25 1.275 V
∆VREF Line Regulation IO=10mA, (VIN-VO) = 1.5 to 5.75V 0.015 0.2 %
∆VREF Load Regulation (VIN-VO)=3V, IO = 10mA to 7.5A 0.3 0.5 %
VdDropout Voltage ∆VO=2%, IO=7.5A 1.05 1.4 V
Isc Short Circuit Current (VIN-VO) = 1.5 to 5.75V 8.5 A
IO(min) Minimum Load Current (VIN-VO) = 1.5 to 5.75V 5 10 mA
IADJ Adjust Pin Current IO = 10mA to 7.5A 40 80 µA
∆IADJ Adjust Pin Current Change IO = 10mA to 7.5A, (VIN-VO) = 1.5 to 5.75V 0.2 5 µA
SVR Supply Voltage Rejection f = 120 Hz, CO = 25 µF, IO = 7.5A,
(VIN-VO)=3V, VPP=1V 60 75 dB
eN RMS Output Noise Voltage
(% of VO)TA = 25°C, f =10Hz to 10kHz, IO=10mA,
(VIN-VO) = 3V 0.003 %
TSHDN Thermal Shutdown
Threshold 175 °C
THYST Thermal Shutdown
Hysteresis 5°C
Symbol Parameter Test Conditions Min. Typ. Max. Unit
VOOutput Voltage IO=10mA, (VIN-VO)=3V, Tj = 25°C 1.485 1.5 1.515 V
IO = 0 to 7.5A, (VIN-VO) = 1.5 to 5.5V
(note1) 1.47 1.5 1.53 V
∆VOLine Regulation IO=10mA, (VIN-VO) = 1.5 to 5.5V 0.015 0.2 %
∆VOLoad Regulation (VIN-VO)=3V, IO = 0 to 7.5A 0.3 0.5 %
VdDropout Voltage ∆VO=2%, IO=7.5A 1.05 1.4 V
Isc Short Circuit Current (VIN-VO) = 1.5 to 5.5V 8.5 A
IdQuiescent Current (VIN-VO) = 1.5 to 5.5V, IO=0A 5 10 mA
SVR Supply Voltage Rejection f = 120 Hz, CO = 25 µF, IO = 7.5A,
(VIN-VO) = 3V, VPP=1V 58.6 73.4 dB
eN RMS Output Noise Voltage
(% of VO)TA = 25°C, f =10Hz to 10kHz, IO=10mA,
(VIN-VO)=3V 0.003 %
TSHDN Thermal Shutdown
Threshold 175 °C
THYST Thermal Shutdown
Hysteresis 5°C
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Table 6: Electrical Characteri stics Of KD1083#18(VIN=3 . 5V , CI = CO =10µF, Tj = -40 t o 125°C, unless
otherwise specified.)
NOT E 1: See short-ci rcuit c urrent cu rv e for avail able ou tp ut current a t fi xed dropout.
Table 7: Electrical Characteristics Of KD1083#25 (VIN=4.25V, CI = CO =10µF, T j = -40 to 125°C,
unless otherwise specified.)
NOT E 1: See short-ci rcuit c urrent cu rv e for avail able ou tp ut current a t fi xed dropout.
Symbol Parameter Test Conditions Min. Typ. Max. Unit
VOOutput Voltage IO=10mA, (VIN-VO)=3V, Tj = 25°C 1.782 1.8 1.818 V
IO = 0 to 7.5A, (VIN-VO) = 1.5 to 5.2V
(note1) 1.764 1.8 1.836 V
∆VOLine Regulation IO=10mA, (VIN-VO) = 1.5 to 5.2V 0.015 0.2 %
∆VOLoad Regulation (VIN-VO)=3V, IO = 0 to 7.5A 0.3 0.5 %
VdDropout Voltage ∆VO=2%, IO=7.5A 1.05 1.4 V
Isc Short Circuit Current (VIN-VO) = 1.5 to 5.2V 8.5 A
IdQuiescent Current (VIN-VO) = 1.5 to 5.2V, IO=0A 5 10 mA
SVR Supply Voltage Rejection f = 120 Hz, CO = 25 µF, IO = 7.5A,
(VIN-VO) = 3V, VPP=1V 57 71.8 dB
eN RMS Output Noise Voltage
(% of VO)TA = 25°C, f =10Hz to 10kHz, IO=10mA,
(VIN-VO)=3V 0.003 %
TSHDN Thermal Shutdown
Threshold 175 °C
THYST Thermal Shutdown
Hysteresis 5°C
Symbol Parameter Test Conditions Min. Typ. Max. Unit
VOOutput Voltage IO=10mA, (VIN-VO)=3V, Tj = 25°C 2.475 2.5 2.525 V
IO = 0 to 7.5A, (VIN-VO) = 1.5 to 4.5V
(note 1) 2.45 2.5 2.55 V
∆VOLine Regulation IO=10mA, (VIN-VO) = 1.5 to 4.5V 0.015 0.2 %
∆VOLoad Regulation (VIN-VO)=3V, IO = 0 to 7.5A 0.3 0.5 %
VdDropout Voltage ∆VO=2%, IO=7.5A 1.05 1.4 V
Isc Short Circuit Current (VIN-VO) = 1.5 to 4.5V 8.5 A
IdQuiescent Current (VIN-VO) = 1.5 to 4.5V, IO=0A 5 10 mA
SVR Supply Voltage Rejection f = 120 Hz, CO = 25 µF, IO = 7.5A,
(VIN-VO) = 3V, VPP=1V 54.1 68.9 dB
eN RMS Output Noise Voltage
(% of VO)TA = 25°C, f =10Hz to 10kHz, IO=10mA,
(VIN-VO)=3V 0.003 %
TSHDN Thermal Shutdown
Threshold 175 °C
THYST Thermal Shutdown
Hysteresis 5°C
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Table 8: Electrical Charac teris tics Of KD1083#30 (VIN=4.75V, CI = CO =10µF, Tj = -40 to 125°C,
unless otherwise speci fied.)
NOT E 1: S ee short -cir cuit cur rent curve for ava i la bl e output current at fixed dropout.
Table 9: Electrical Characteristics Of KD1083#33 (VIN=5. 0V , CI = C O =10µF, T j = -40 to 125°C, unl ess
otherwise spec ifi ed.)
NOT E 1: S ee short -cir cuit cur rent curve for ava i la bl e output current at fixed dropout.
Symbol Parameter Test Conditions Min. Typ. Max. Unit
VOOutput Voltage IO=10mA, (VIN-VO)=3V, Tj = 25°C 2.97 3.0 3.03 V
IO = 0 to 7.5A, (VIN-VO) = 1.5 to 4V
(note 1) 2.94 3 3.06 V
∆VOLine Regulation IO=10mA, (VIN-VO) = 1.5 to 4V 0.015 0.2 %
∆VOLoad Regu lation (VIN-VO)=3V, IO = 0 to 7.5A 0.3 0.5 %
VdDropout Voltage ∆VO=2%, IO=7.5A 1.05 1.4 V
Isc Short Circu it Current (VIN-VO) = 1.5 to 4V 8.5 A
IdQuiescent Current (VIN-VO) = 1.5 to 4V, IO=0A 5 10 mA
SVR Supply Voltage Rejection f = 120 Hz, CO = 25 µF, IO = 7.5A,
(VIN-VO) = 3V, VPP=1V 52.5 67.3 dB
eN RMS Output Noise Voltage
(% of VO)TA = 25°C, f =10Hz to 10kHz, IO=10mA,
(VIN-VO)=3V 0.003 %
TSHDN Thermal Shutdown
Threshold 175 °C
THYST Thermal Shutdown
Hysteresis 5°C
Symbol Parameter Test Conditions Min. Typ. Max. Unit
VOOutput Voltage IO=10mA, (VIN-VO)=3V, Tj = 25°C 3.267 3.3 3.333 V
IO = 0 to 7.5A, (VIN-VO) = 1.5 to 3.7V
(note 1) 3.234 3.3 3.366 V
∆VOLine Regulation IO=10mA, (VIN-VO) = 1.5 to 3.7V 0.015 0.2 %
∆VOLoad Regu lation (VIN-VO)=3V, IO = 0 to 7.5A 0.3 0.5 %
VdDropout Voltage ∆VO=2%, IO=7.5A 1.05 1.4 V
Isc Short Circu it Current (VIN-VO) = 1.5 to 3.7V 8.5 A
IdQuiescent Current (VIN-VO) = 1.5 to 3.7V, IO=0A 5 10 mA
SVR Supply Voltage Rejection f = 120 Hz, CO = 25 µF, IO = 7.5A,
(VIN-VO) = 3V, VPP=1V 51.7 66.5 dB
eN RMS Output Noise Voltage
(% of VO)TA = 25°C, f =10Hz to 10kHz, IO=10mA,
(VIN-VO)=3V 0.003 %
TSHDN Thermal Shutdown
Threshold 175 °C
THYST Thermal Shutdown
Hysteresis 5°C
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TYPICA L CHARACTERISTI CS
(C
I
=C
O
=10µF(tantalum), unless otherwise specified)
Fi gure 4: Reference Voltage vs Temperature
Fi gure 5: Reference Voltage vs Temperature
Fi gure 6: Reference Voltage vs Temperature
Fi gure 7: Line Regulation vs Tempe rature
Fi gure 8: Load Regulation vs Temperature
Fi gure 9: Dropout Voltage vs Temperature
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Fi gure 10: Dropout Voltage vs Temperature
Fi gure 11: Adjust Pin Current vs T emperature
Fi gure 12: Quiesc ent Current vs Temperature
Fi gure 13: Minimum Load Current vs
Temperature
Fi gure 14: Dropout Voltage vs Output Curren t
Fi gure 15: Suppl y Voltage Rejection vs Outpu t
Current
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Fi gure 16: Short Circuit Current vs Dropout
Voltage
Fi gure 17: Supply Voltage Reject ion vs
Temperature
Fi gure 18: Line Transient
Fi gure 19: Line Transient
Fi gure 20: Load Transient
Fi gure 21: Load Transient
VO=10V
VIN
VO
VIN=from 12 to 13V, IO=100mA, CI = 1µF(tant al um), CO=10µF(tan-
talum)
VIN
VO
VO=10V
VIN=from 13 to 12V, IO=100mA, CI = 1µF(tant al um ) , CO=10µF(tan-
talum)
VO=10V
VO
IO
VI=12 V, IO=from 0.1A to 7.5A, CI = 10µF(tantalum), CO=10µF(tan-
talum)
VO=10V
VO
IO
VI=12 V, IO=from 7.5A to 0.1A, CI = 10µF(tantalum), CO=10µF(tan-
talum)
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DIM. mm. inch
MIN. TYP MAX. MIN. TYP. MAX.
A 4.4 4.6 0.173 0.181
A1 2.49 2.69 0.098 0.106
A2 0.03 0.23 0.001 0.009
B 0.7 0.93 0.027 0.036
B2 1.14 1.7 0.044 0.067
C 0.45 0.6 0.017 0.023
C2 1.23 1.36 0.048 0.053
D 8.95 9.35 0.352 0.368
D1 8 0.315
E 10 10.4 0.393 0.409
E1 8.5 0.335
G 4.88 5.28 0.192 0.208
L 15 15.85 0.590 0.624
L2 1.27 1.4 0.050 0.055
L3 1.4 1.75 0.055 0.068
M 2.4 3.2 0.094 0.126
R 0.4 0.016
V2 0˚ 8˚ 0˚ 8˚
D2PAK MECHANICAL DATA
P011P6G
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DIM. mm. inch
MIN. TYP MAX. MIN. TYP. MAX.
A 4.40 4.60 0.173 0.181
C 1.23 1.32 0.048 0.051
D 2.40 2.72 0.094 0.107
D1 1.27 0.050
E 0.49 0.70 0.019 0.027
F 0.61 0.88 0.024 0.034
F1 1.14 1.70 0.044 0.067
F2 1.14 1.70 0.044 0.067
G 4.95 5.15 0.194 0.203
G1 2.4 2.7 0.094 0.106
H2 10.0 10.40 0.393 0.409
L2 16.4 0.645
L4 13.0 14.0 0.511 0.551
L5 2.65 2.95 0.104 0.116
L6 15.25 15.75 0.600 0.620
L7 6.2 6.6 0.244 0.260
L9 3.5 3.93 0.137 0.154
DIA. 3.75 3.85 0.147 0.151
TO-220 MECHANICAL DATA
P011C
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Table 10: Revision History
Date Revisio n Descrip tion of Change s
16-Dec-2004 2 Maturity Change.
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