1/11
October 2002
s
THREE TERMINAL ADJUSTABLE OR FIXED
OUTPUT VOLTAGE 1.5V,1.8V, 2.5V, 3.0, 3.3V
s
OUTPUT CURRENT UP TO 7.5A
s
1.4V MAX DROPOUT VOLTAGE AT FULL
LOAD
s
LINE REGULATION: MAX 0.2% OVER FULL
TEMPERATURE RANGE
s
LOAD REGULATION: MAX 0.5% OVER FULL
TEMPERATURE RANGE
s
OUTPUT CURRENT LIMIT
s
THERMAL SHUTDOWN PROTECTION
WITH HYSTERESIS
s
WIDE OPERATING TEMPERATURE RANGE
-40C TO 125C
s
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
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
25C 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 10F minimum capacitor is required for
output stability.
KD1083
7.5A LOW DROP POSITIVE VOLTAGE REGULATOR
ADJUSTABLE AND FIXED
This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to change without notice.
SCHEMATIC DIAGRAM
TO-220
D
2
PAK
PRELIMINARY DATA
KD1083
2/11
ABSOLUTE MAXIMUM RATINGS
Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these condition is
not implied.
THERMAL DATA
CONNECTION DIAGRAM (top view)
ORDERING CODES
(*) Available in Tape & Reel with the suffix "R" for fixed version and "-R" for adjustable version.
TYPICAL APPLICATION CIRCUITS
Symbol
Parameter
Value
Unit
V
IN
DC Input to Output Voltage
from -0.3 to 10
V
I
O
Output Current
Internally Limited
A
P
D
Power Dissipation
Internally Limited
W
T
stg
Storage Temperature Range
-55 to +150
C
T
op
Operating Junction Temperature Range
-40 to +125
C
Symbol
Parameter
TO-220
D
2
PAK
Unit
R
thj-case
Thermal Resistance Junction-case
3
3
C/W
R
thj-amb
Thermal Resistance Junction-ambient
50
62.5
C/W
TO-220
D
2
PAK
TO-220
D
2
PAK(*)
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
R
2
V
O
= V
REF
(1 +
)
R
1
KD1083
3/11
ELECTRICAL CHARACTERISTICS OF KD1083 (V
IN
=3V, C
I
= C
O
=10
F, T
j
= -40 to 125C, unless
otherwise specified.)
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
=10
F, T
j
= -40 to 125C,
unless otherwise specified.)
NOTE 1: See short-circuit current curve for available output current at fixed dropout.
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
V
REF
Reference Voltage
I
O
=10mA , (V
IN
-V
O
) = 3V, T
j
= 25C
1.237
1.25
1.262
V
I
O
= 0.01 to 7.5A, (V
IN
-V
O
)
= 1.5 to 5.75V
(note1)
1.225
1.25
1.275
V
V
REF
Line Regulation
I
O
=10mA, (V
IN
-V
O
)
= 1.5 to 5.75V
0.015
0.2
%
V
REF
Load Regulation
(V
IN
-V
O
)=3V, I
O
= 10mA to 7.5A
0.3
0.5
%
V
d
Dropout Voltage
V
O
=2%, I
O
=7.5A
1.05
1.4
V
I
sc
Short Circuit Current
(V
IN
-V
O
)
= 1.5 to 5.75V
8.5
A
I
O(min)
Minimum Load Current
(V
IN
-V
O
)
= 1.5 to 5.75V
5
10
mA
I
ADJ
Adjust Pin Current
I
O
= 10mA to 7.5A
40
80
A
I
ADJ
Adjust Pin Current Change
I
O
= 10mA to 7.5A, (V
IN
-V
O
)
= 1.5 to 5.75V
0.2
5
A
SVR
Supply Voltage Rejection
f = 120 Hz, C
O
= 25
F, I
O
= 7.5A,
(V
IN
-V
O
)=3V, V
PP
=1V
60
75
dB
eN
RMS Output Noise Voltage
(% of V
O
)
T
A
= 25C, f =10Hz to 10kHz, I
O
=10mA,
(V
IN
-V
O
) = 3V
0.003
%
T
SHDN
Thermal Shutdown
Threshold
175
C
T
HYST
Thermal Shutdown
Hysteresis
5
C
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
V
O
Output Voltage
I
O
=10mA , (V
IN
-V
O
)=3V, T
j
= 25C
1.485
1.5
1.515
V
I
O
= 0 to 7.5A, (V
IN
-V
O
)
= 1.5 to 5.5V
(note1)
1.47
1.5
1.53
V
V
O
Line Regulation
I
O
=10mA, (V
IN
-V
O
)
= 1.5 to 5.5V
0.015
0.2
%
V
O
Load Regulation
(V
IN
-V
O
)=3V, I
O
= 0 to 7.5A
0.3
0.5
%
V
d
Dropout Voltage
V
O
=2%, I
O
=7.5A
1.05
1.4
V
I
sc
Short Circuit Current
(V
IN
-V
O
)
= 1.5 to 5.5V
8.5
A
I
d
Quiescent Current
(V
IN
-V
O
)
= 1.5 to 5.5V, I
O
=0A
5
10
mA
SVR
Supply Voltage Rejection
f = 120 Hz, C
O
= 25
F, I
O
= 7.5A,
(V
IN
-V
O
) = 3V, V
PP
=1V
58.6
73.4
dB
eN
RMS Output Noise Voltage
(% of V
O
)
T
A
= 25C, f =10Hz to 10kHz, I
O
=10mA,
(V
IN
-V
O
)=3V
0.003
%
T
SHDN
Thermal Shutdown
Threshold
175
C
T
HYST
Thermal Shutdown
Hysteresis
5
C
KD1083
4/11
ELECTRICAL CHARACTERISTICS OF KD1083#18(V
IN
=3.5V, C
I
= C
O
=10
F, T
j
= -40 to 125C, unless
otherwise specified.)
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
=10
F, T
j
= -40 to 125C,
unless otherwise specified.)
NOTE 1: See short-circuit current curve for available output current at fixed dropout.
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
V
O
Output Voltage
I
O
=10mA , (V
IN
-V
O
)=3V, T
j
= 25C
1.782
1.8
1.818
V
I
O
= 0 to 7.5A, (V
IN
-V
O
)
= 1.5 to 5.2V
(note1)
1.764
1.8
1.836
V
V
O
Line Regulation
I
O
=10mA, (V
IN
-V
O
)
= 1.5 to 5.2V
0.015
0.2
%
V
O
Load Regulation
(V
IN
-V
O
)=3V, I
O
= 0 to 7.5A
0.3
0.5
%
V
d
Dropout Voltage
V
O
=2%, I
O
=7.5A
1.05
1.4
V
I
sc
Short Circuit Current
(V
IN
-V
O
)
= 1.5 to 5.2V
8.5
A
I
d
Quiescent Current
(V
IN
-V
O
)
= 1.5 to 5.2V, I
O
=0A
5
10
mA
SVR
Supply Voltage Rejection
f = 120 Hz, C
O
= 25
F, I
O
= 7.5A,
(V
IN
-V
O
) = 3V, V
PP
=1V
57
71.8
dB
eN
RMS Output Noise Voltage
(% of V
O
)
T
A
= 25C, f =10Hz to 10kHz, I
O
=10mA,
(V
IN
-V
O
)=3V
0.003
%
T
SHDN
Thermal Shutdown
Threshold
175
C
T
HYST
Thermal Shutdown
Hysteresis
5
C
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
V
O
Output Voltage
I
O
=10mA , (V
IN
-V
O
)=3V, T
j
= 25C
2.475
2.5
2.525
V
I
O
= 0 to 7.5A, (V
IN
-V
O
)
= 1.5 to 4.5V
(note 1)
2.45
2.5
2.55
V
V
O
Line Regulation
I
O
=10mA, (V
IN
-V
O
)
= 1.5 to 4.5V
0.015
0.2
%
V
O
Load Regulation
(V
IN
-V
O
)=3V, I
O
= 0 to 7.5A
0.3
0.5
%
V
d
Dropout Voltage
V
O
=2%, I
O
=7.5A
1.05
1.4
V
I
sc
Short Circuit Current
(V
IN
-V
O
)
= 1.5 to 4.5V
8.5
A
I
d
Quiescent Current
(V
IN
-V
O
)
= 1.5 to 4.5V, I
O
=0A
5
10
mA
SVR
Supply Voltage Rejection
f = 120 Hz, C
O
= 25
F, I
O
= 7.5A,
(V
IN
-V
O
) = 3V, V
PP
=1V
54.1
68.9
dB
eN
RMS Output Noise Voltage
(% of V
O
)
T
A
= 25C, f =10Hz to 10kHz, I
O
=10mA,
(V
IN
-V
O
)=3V
0.003
%
T
SHDN
Thermal Shutdown
Threshold
175
C
T
HYST
Thermal Shutdown
Hysteresis
5
C
KD1083
5/11
ELECTRICAL CHARACTERISTICS OF KD1083#30 (V
IN
=4.75V, C
I
= C
O
=10
F, T
j
= -40 to 125C,
unless otherwise specified.)
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
=10
F, T
j
= -40 to 125C, unless
otherwise specified.)
NOTE 1: See short-circuit current curve for available output current at fixed dropout.
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
V
O
Output Voltage
I
O
=10mA , (V
IN
-V
O
)=3V, T
j
= 25C
2.97
3.0
3.03
V
I
O
= 0 to 7.5A, (V
IN
-V
O
)
= 1.5 to 4V
(note 1)
2.94
3
3.06
V
V
O
Line Regulation
I
O
=10mA, (V
IN
-V
O
)
= 1.5 to 4V
0.015
0.2
%
V
O
Load Regulation
(V
IN
-V
O
)=3V, I
O
= 0 to 7.5A
0.3
0.5
%
V
d
Dropout Voltage
V
O
=2%, I
O
=7.5A
1.05
1.4
V
I
sc
Short Circuit Current
(V
IN
-V
O
)
= 1.5 to 4V
8.5
A
I
d
Quiescent Current
(V
IN
-V
O
)
= 1.5 to 4V, I
O
=0A
5
10
mA
SVR
Supply Voltage Rejection
f = 120 Hz, C
O
= 25
F, I
O
= 7.5A,
(V
IN
-V
O
) = 3V, V
PP
=1V
52.5
67.3
dB
eN
RMS Output Noise Voltage
(% of V
O
)
T
A
= 25C, f =10Hz to 10kHz, I
O
=10mA,
(V
IN
-V
O
)=3V
0.003
%
T
SHDN
Thermal Shutdown
Threshold
175
C
T
HYST
Thermal Shutdown
Hysteresis
5
C
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
V
O
Output Voltage
I
O
=10mA , (V
IN
-V
O
)=3V, T
j
= 25C
3.267
3.3
3.333
V
I
O
= 0 to 7.5A, (V
IN
-V
O
)
= 1.5 to 3.7V
(note 1)
3.234
3.3
3.366
V
V
O
Line Regulation
I
O
=10mA, (V
IN
-V
O
)
= 1.5 to 3.7V
0.015
0.2
%
V
O
Load Regulation
(V
IN
-V
O
)=3V, I
O
= 0 to 7.5A
0.3
0.5
%
V
d
Dropout Voltage
V
O
=2%, I
O
=7.5A
1.05
1.4
V
I
sc
Short Circuit Current
(V
IN
-V
O
)
= 1.5 to 3.7V
8.5
A
I
d
Quiescent Current
(V
IN
-V
O
)
= 1.5 to 3.7V, I
O
=0A
5
10
mA
SVR
Supply Voltage Rejection
f = 120 Hz, C
O
= 25
F, I
O
= 7.5A,
(V
IN
-V
O
) = 3V, V
PP
=1V
51.7
66.5
dB
eN
RMS Output Noise Voltage
(% of V
O
)
T
A
= 25C, f =10Hz to 10kHz, I
O
=10mA,
(V
IN
-V
O
)=3V
0.003
%
T
SHDN
Thermal Shutdown
Threshold
175
C
T
HYST
Thermal Shutdown
Hysteresis
5
C
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