KD1083
7.5A LOW DROP POSITIVE VOLTAGE REGULATOR
ADJUSTABLE AND FIXED
PRELIMINARY DATA
s
s
s
s
s
s
s
s
s
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
TO-220
D
2
PAK
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
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
V
IN
I
O
P
D
T
stg
T
op
DC Input to Output Voltage
Output Current
Power Dissipation
Storage Temperature Range
Operating Junction Temperature Range
Parameter
Value
from -0.3 to 10
Internally Limited
Internally Limited
-55 to +150
-40 to +125
Unit
V
A
W
°C
°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
R
thj-case
R
thj-amb
Parameter
Thermal Resistance Junction-case
Thermal Resistance Junction-ambient
TO-220
3
50
D
2
PAK
3
62.5
Unit
°C/W
°C/W
CONNECTION DIAGRAM
(top view)
TO-220
D
2
PAK
ORDERING CODES
TO-220
KD1083V15
KD1083V18
KD1083V25
KD1083V30
KD1083V33
KD1083V
D
2
PAK(*)
KD1083D2T15
KD1083D2T18
KD1083D2T25
KD1083D2T30
KD1083D2T33
KD1083D2T
OUTPUT VOLTAGE
1.5V
1.8V
2.5V
3.0V
3.3V
Adjustable
(*) Available in Tape & Reel with the suffix "R" for fixed version and "-R" for adjustable version.
TYPICAL APPLICATION CIRCUITS
R
2
V
O
= V
REF
(1 +
)
R
1
2/11
KD1083
ELECTRICAL CHARACTERISTICS OF KD1083
(V
IN
=3V, C
I
= C
O
=10µF, T
j
= -40 to 125°C, unless
otherwise specified.)
Symbol
V
REF
Parameter
Reference Voltage
Test Conditions
I
O
=10mA , (V
IN
-V
O
) = 3V, T
j
= 25°C
I
O
= 0.01 to 7.5A, (V
IN
-V
O
)
= 1.5 to 5.75V
(note1)
I
O
=10mA, (V
IN
-V
O
)
= 1.5 to 5.75V
(V
IN
-V
O
)=3V, I
O
= 10mA to 7.5A
∆V
O
=2%, I
O
=7.5A
(V
IN
-V
O
)
= 1.5 to 5.75V
(V
IN
-V
O
)
= 1.5 to 5.75V
I
O
= 10mA to 7.5A
I
O
= 10mA to 7.5A, (V
IN
-V
O
)
= 1.5 to 5.75V
f = 120 Hz, C
O
= 25
µF,
I
O
= 7.5A,
(V
IN
-V
O
)=3V, V
PP
=1V
T
A
= 25°C, f =10Hz to 10kHz, I
O
=10mA,
(V
IN
-V
O
) = 3V
60
Min.
1.237
1.225
Typ.
1.25
1.25
0.015
0.3
1.05
8.5
5
40
0.2
75
0.003
175
5
10
80
5
Max.
1.262
1.275
0.2
0.5
1.4
Unit
V
V
%
%
V
A
mA
µA
µA
dB
%
°C
°C
∆V
REF
∆V
REF
V
d
I
sc
I
O(min)
I
ADJ
∆I
ADJ
SVR
eN
T
SHDN
T
HYST
Line Regulation
Load Regulation
Dropout Voltage
Short Circuit Current
Minimum Load Current
Adjust Pin Current
Adjust Pin Current Change
Supply Voltage Rejection
RMS Output Noise Voltage
(% of V
O
)
Thermal Shutdown
Threshold
Thermal Shutdown
Hysteresis
NOTE 1: See short-circuit current curve for available output current at fixed dropout.
ELECTRICAL CHARACTERISTICS OF KD1083#15
(V
IN
=3.25V, C
I
= C
O
=10µF, T
j
= -40 to 125°C,
unless otherwise specified.)
Symbol
V
O
Parameter
Output Voltage
Test Conditions
I
O
=10mA , (V
IN
-V
O
)=3V, T
j
= 25°C
I
O
= 0 to 7.5A, (V
IN
-V
O
)
= 1.5 to 5.5V
(note1)
I
O
=10mA, (V
IN
-V
O
)
= 1.5 to 5.5V
(V
IN
-V
O
)=3V, I
O
= 0 to 7.5A
∆V
O
=2%, I
O
=7.5A
(V
IN
-V
O
)
= 1.5 to 5.5V
(V
IN
-V
O
)
= 1.5 to 5.5V, I
O
=0A
f = 120 Hz, C
O
= 25
µF,
I
O
= 7.5A,
(V
IN
-V
O
) = 3V, V
PP
=1V
T
A
= 25°C, f =10Hz to 10kHz, I
O
=10mA,
(V
IN
-V
O
)=3V
58.6
Min.
1.485
1.47
Typ.
1.5
1.5
0.015
0.3
1.05
8.5
5
73.4
0.003
175
5
10
Max.
1.515
1.53
0.2
0.5
1.4
Unit
V
V
%
%
V
A
mA
dB
%
°C
°C
∆V
O
∆V
O
V
d
I
sc
I
d
SVR
eN
T
SHDN
T
HYST
Line Regulation
Load Regulation
Dropout Voltage
Short Circuit Current
Quiescent Current
Supply Voltage Rejection
RMS Output Noise Voltage
(% of V
O
)
Thermal Shutdown
Threshold
Thermal Shutdown
Hysteresis
NOTE 1: See short-circuit current curve for available output current at fixed dropout.
3/11
KD1083
ELECTRICAL CHARACTERISTICS OF KD1083#18(V
IN
=3.5V, C
I
= C
O
=10µF, T
j
= -40 to 125°C, unless
otherwise specified.)
Symbol
V
O
Parameter
Output Voltage
Test Conditions
I
O
=10mA , (V
IN
-V
O
)=3V, T
j
= 25°C
I
O
= 0 to 7.5A, (V
IN
-V
O
)
= 1.5 to 5.2V
(note1)
I
O
=10mA, (V
IN
-V
O
)
= 1.5 to 5.2V
(V
IN
-V
O
)=3V, I
O
= 0 to 7.5A
∆V
O
=2%, I
O
=7.5A
(V
IN
-V
O
)
= 1.5 to 5.2V
(V
IN
-V
O
)
= 1.5 to 5.2V, I
O
=0A
f = 120 Hz, C
O
= 25
µF,
I
O
= 7.5A,
(V
IN
-V
O
) = 3V, V
PP
=1V
T
A
= 25°C, f =10Hz to 10kHz, I
O
=10mA,
(V
IN
-V
O
)=3V
57
Min.
1.782
1.764
Typ.
1.8
1.8
0.015
0.3
1.05
8.5
5
71.8
0.003
175
5
10
Max.
1.818
1.836
0.2
0.5
1.4
Unit
V
V
%
%
V
A
mA
dB
%
°C
°C
∆V
O
∆V
O
V
d
I
sc
I
d
SVR
eN
T
SHDN
T
HYST
Line Regulation
Load Regulation
Dropout Voltage
Short Circuit Current
Quiescent Current
Supply Voltage Rejection
RMS Output Noise Voltage
(% of V
O
)
Thermal Shutdown
Threshold
Thermal Shutdown
Hysteresis
NOTE 1: See short-circuit current curve for available output current at fixed dropout.
ELECTRICAL CHARACTERISTICS OF KD1083#25
(V
IN
=4.25V, C
I
= C
O
=10µF, T
j
= -40 to 125°C,
unless otherwise specified.)
Symbol
V
O
Parameter
Output Voltage
Test Conditions
I
O
=10mA , (V
IN
-V
O
)=3V, T
j
= 25°C
I
O
= 0 to 7.5A, (V
IN
-V
O
)
= 1.5 to 4.5V
(note 1)
I
O
=10mA, (V
IN
-V
O
)
= 1.5 to 4.5V
(V
IN
-V
O
)=3V, I
O
= 0 to 7.5A
∆V
O
=2%, I
O
=7.5A
(V
IN
-V
O
)
= 1.5 to 4.5V
(V
IN
-V
O
)
= 1.5 to 4.5V, I
O
=0A
f = 120 Hz, C
O
= 25
µF,
I
O
= 7.5A,
(V
IN
-V
O
) = 3V, V
PP
=1V
T
A
= 25°C, f =10Hz to 10kHz, I
O
=10mA,
(V
IN
-V
O
)=3V
54.1
Min.
2.475
2.45
Typ.
2.5
2.5
0.015
0.3
1.05
8.5
5
68.9
0.003
175
5
10
Max.
2.525
2.55
0.2
0.5
1.4
Unit
V
V
%
%
V
A
mA
dB
%
°C
°C
∆V
O
∆V
O
V
d
I
sc
I
d
SVR
eN
T
SHDN
T
HYST
Line Regulation
Load Regulation
Dropout Voltage
Short Circuit Current
Quiescent Current
Supply Voltage Rejection
RMS Output Noise Voltage
(% of V
O
)
Thermal Shutdown
Threshold
Thermal Shutdown
Hysteresis
NOTE 1: See short-circuit current curve for available output current at fixed dropout.
4/11
KD1083
ELECTRICAL CHARACTERISTICS OF KD1083#30
(V
IN
=4.75V, C
I
= C
O
=10µF, T
j
= -40 to 125°C,
unless otherwise specified.)
Symbol
V
O
Parameter
Output Voltage
Test Conditions
I
O
=10mA , (V
IN
-V
O
)=3V, T
j
= 25°C
I
O
= 0 to 7.5A, (V
IN
-V
O
)
= 1.5 to 4V
(note 1)
I
O
=10mA, (V
IN
-V
O
)
= 1.5 to 4V
(V
IN
-V
O
)=3V, I
O
= 0 to 7.5A
∆V
O
=2%, I
O
=7.5A
(V
IN
-V
O
)
= 1.5 to 4V
(V
IN
-V
O
)
= 1.5 to 4V, I
O
=0A
f = 120 Hz, C
O
= 25
µF,
I
O
= 7.5A,
(V
IN
-V
O
) = 3V, V
PP
=1V
T
A
= 25°C, f =10Hz to 10kHz, I
O
=10mA,
(V
IN
-V
O
)=3V
52.5
Min.
2.97
2.94
Typ.
3.0
3
0.015
0.3
1.05
8.5
5
67.3
0.003
175
5
10
Max.
3.03
3.06
0.2
0.5
1.4
Unit
V
V
%
%
V
A
mA
dB
%
°C
°C
∆V
O
∆V
O
V
d
I
sc
I
d
SVR
eN
T
SHDN
T
HYST
Line Regulation
Load Regulation
Dropout Voltage
Short Circuit Current
Quiescent Current
Supply Voltage Rejection
RMS Output Noise Voltage
(% of V
O
)
Thermal Shutdown
Threshold
Thermal Shutdown
Hysteresis
NOTE 1: See short-circuit current curve for available output current at fixed dropout.
ELECTRICAL CHARACTERISTICS OF KD1083#33
(V
IN
=5.0V, C
I
= C
O
=10µF, T
j
= -40 to 125°C, unless
otherwise specified.)
Symbol
V
O
Parameter
Output Voltage
Test Conditions
I
O
=10mA , (V
IN
-V
O
)=3V, T
j
= 25°C
I
O
= 0 to 7.5A, (V
IN
-V
O
)
= 1.5 to 3.7V
(note 1)
I
O
=10mA, (V
IN
-V
O
)
= 1.5 to 3.7V
(V
IN
-V
O
)=3V, I
O
= 0 to 7.5A
∆V
O
=2%, I
O
=7.5A
(V
IN
-V
O
)
= 1.5 to 3.7V
(V
IN
-V
O
)
= 1.5 to 3.7V, I
O
=0A
f = 120 Hz, C
O
= 25
µF,
I
O
= 7.5A,
(V
IN
-V
O
) = 3V, V
PP
=1V
T
A
= 25°C, f =10Hz to 10kHz, I
O
=10mA,
(V
IN
-V
O
)=3V
51.7
Min.
3.267
3.234
Typ.
3.3
3.3
0.015
0.3
1.05
8.5
5
66.5
0.003
175
5
10
Max.
3.333
3.366
0.2
0.5
1.4
Unit
V
V
%
%
V
A
mA
dB
%
°C
°C
∆V
O
∆V
O
V
d
I
sc
I
d
SVR
eN
T
SHDN
T
HYST
Line Regulation
Load Regulation
Dropout Voltage
Short Circuit Current
Quiescent Current
Supply Voltage Rejection
RMS Output Noise Voltage
(% of V
O
)
Thermal Shutdown
Threshold
Thermal Shutdown
Hysteresis
NOTE 1: See short-circuit current curve for available output current at fixed dropout.
5/11
