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May 2002
s
TYPICAL DROPOUT 1.3V (AT 5A)
s
THREE TERMINAL ADJUSTABLE OR FIXED
OUTPUT VOLTAGE 1.5V, 1.8V, 2.5V, 2.85V,
3.3V, 3.6V, 5V.
s
GUARANTEED OUTPUT CURRENT UP TO
5A
s
OUPUT TOLERANCE
1% AT 25C AND
2% IN FULL TEMPERATURE RANGE FOR
THE "A" VERSION
s
OUPUT TOLERANCE
2% AT 25C AND
3% IN FULL TEMPERATURE RANGE
INTERNAL POWER AND THERMAL LIMIT
s
WIDE OPERATING TEMPERATURE RANGE
-40C TO 125C
s
PACKAGE AVAILABLE : TO-220, D
2
PAK,
D
2
PAK/A, DPAK
s
PINOUT COMPATIBILITY WITH STANDARD
ADJUSTABLE VREG
DESCRIPTION
The KD1084 is a LOW DROP Voltage Regulator
able to provide up to 5A of Output Current.
Dropout is guaranteed at a maximum of 1.5V at
the maximum output current, decreasing at lower
loads. The KD1084 is pin to pin compatible with
the older 3-terminal adjustable regulators, but has
better performances in term of drop and output
tolerance .
A 2.85V output version is suitable for SCSI-2
active termination. Unlike PNP regulators, where
a part of the output current is wasted as quiescent
current, the KD1084 quiescent current flows into
the load, so increase efficiency. Only a 10F
minimum capacitor is need for stability.
The devices are supplied in TO-220, D
2
PAK,
D
2
PAK/A and DPAK. On chip trimming allows the
regulator to reach a very tight output voltage
tolerance, within 1% at 25C for "A" version and
2% at 25C for standard version.
KD1084
SERIES
5A LOW DROP POSITIVE VOLTAGE
REGULATOR ADJUSTABLE AND FIXED
SCHEMATIC DIAGRAM
TO-220
D
2
PAK
D
2
PAK/A
DPAK
KD1084 SERIES
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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
APPLICATION CIRCUITS
Symbol
Parameter
Value
Unit
V
I
DC Input Voltage
12
V
I
O
Output Current
Internally Limited
mA
P
D
Power Dissipation
Internally Limited
mW
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
D
2
PAK/A
DPAK
Unit
R
thj-case
Thermal Resistance Junction-case
3
3
3
C/W
R
thj-amb
Thermal Resistance Junction-ambient
50
62.5
50
C/W
R
2
V
O
= V
REF
(1 +
)
R
1
KD1084 SERIES
3/18
CONNECTION DIAGRAM (top view)
ORDERING CODES
(*) Available on request
(**) Available in Tape & Reel with the suffix "R" for fixed versions and "-R" for adjustable version
TO-220
D
2
PAK
D
2
PAK/A
DPAK
TO-220
D
2
PAK (**)
D
2
PAK/A
DPAK
OUTPUT
VOLTAGE
TOLERANCE
KD1084V15 (*)
KD1084D2T15
KD1084D2M15
KD1084DT15
1.5 V
2%
KD1084AV15 (*)
KD1084AD2T15
KD1084AD2M15
KD1084ADT15
1.5 V
1%
KD1084V18
KD1084D2T18
KD1084D2M18
KD1084DT18
1.8 V
2%
KD1084AV18
KD1084AD2T18
KD1084AD2M18
KD1084ADT18
1.8 V
1%
KD1084V25
KD1084D2T25
KD1084D2M25
KD1084DT25 (*)
2.5 V
2%
KD1084AV25
KD1084AD2T25
KD1084AD2M25
KD1084ADT25 (*)
2.5 V
1%
KD1084V28 (*)
KD1084D2T28 (*)
KD1084D2M28 (*)
KD1084DT28 (*)
2.85 V
2%
KD1084AV28 (*)
KD1084AD2T28 (*) KD1084AD2M28 (*)
KD1084ADT28 (*)
2.85 V
1%
KD1084V33
KD1084D2T33
KD1084D2M33
KD1084DT33
3.3 V
2%
KD1084AV33
KD1084AD2T33
KD1084AD2M33
KD1084ADT33
3.3 V
1%
KD1084V36
KD1084D2T36
KD1084D2M36
KD1084DT36
3.6 V
2%
KD1084AV36
KD1084AD2T36
KD1084AD2M36
KD1084ADT36
3.6 V
1%
KD1084V50
KD1084D2T50
KD1084D2M50
KD1084DT50 (*)
5.0 V
2%
KD1084AV50
KD1084AD2T50
KD1084AD2M50
KD1084ADT50 (*)
5.0 V
1%
KD1084V
KD1084D2T
KD1084D2M
KD1084DT
ADJ
2%
KD1084AV
KD1084AD2T
KD1084AD2M
KD1084ADT
ADJ
1%
KD1084 SERIES
4/18
ELECTRICAL CHARACTERISTICS OF KD1084A#15 (V
I
=4.5V, C
I
= C
O
=10
F (Tant.), T
A
= -40 to
125C, unless otherwise specified.)
ELECTRICAL CHARACTERISTICS OF KD1084A#18 (V
I
=4.8V, C
I
= C
O
=10
F (Tant.), T
A
= -40 to
125C, unless otherwise specified.)
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
V
O
Output Voltage
I
O
= 0 mA
T
J
= 25C
1.485
1.5
1.515
V
I
O
= 0 to 5A V
I
= 3.1 to 10V
1.47
1.5
1.53
V
V
O
Line Regulation
I
O
= 0 mA
V
I
= 3.1 to 10V T
J
= 25C
0.5
6
mV
I
O
= 0 mA
V
I
= 3.1 to 10V
1
6
mV
V
O
Load Regulation
I
O
= 0 to 5A T
J
= 25C
3
15
mV
I
O
= 0 to 5A
7
20
V
V
d
Dropout Voltage
I
O
=5 A
1.3
1.5
V
I
q
Quiescent Current
V
I
10V
5
10
mA
I
sc
Short Circuit Current
V
I
- V
O
= 5V
5.5
7
A
Termal Regulation
T
A
= 25C, 30ms pulse
0.003
0.015
%/W
SVR
Supply Voltage Rejection
f = 120 Hz,
C
O
= 25
F, I
O
= 5A
V
I
= 5
1.5V
60
75
dB
eN
RMS Output Noise Voltage
(% of V
O
)
T
A
= 25C
f =10Hz to 10KHz
0.003
%
S
Temperature Stability
0.5
%
S
Long Term Stability
T
A
= 125C
1000Hrs
0.5
%
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
V
O
Output Voltage
I
O
= 0 mA
T
J
= 25C
1.782
1.8
1.818
V
I
O
= 0 to 5A V
I
= 3.4 to 10V
1.764
1.8
1.836
V
V
O
Line Regulation
I
O
= 0 mA
V
I
= 3.4 to 10V T
J
= 25C
0.5
6
mV
I
O
= 0 mA
V
I
= 3.4 to 10V
1
6
mV
V
O
Load Regulation
I
O
= 0 to 5A T
J
= 25C
3
15
mV
I
O
= 0 to 5A
7
20
V
V
d
Dropout Voltage
I
O
=5 A
1.3
1.5
V
I
q
Quiescent Current
V
I
10V
5
10
mA
I
sc
Short Circuit Current
V
I
- V
O
= 5V
5.5
7
A
Termal Regulation
T
A
= 25C, 30ms pulse
0.003
0.015
%/W
SVR
Supply Voltage Rejection
f = 120 Hz,
C
O
= 25
F, I
O
= 5A
V
I
= 5.3
1.5V
60
75
dB
eN
RMS Output Noise Voltage
(% of V
O
)
T
A
= 25C
f =10Hz to 10KHz
0.003
%
S
Temperature Stability
0.5
%
S
Long Term Stability
T
A
= 125C
1000Hrs
0.5
%
KD1084 SERIES
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ELECTRICAL CHARACTERISTICS OF KD1084A#25 (V
I
=5.5V, C
I
= C
O
=10
F (Tant.), T
A
= -40 to
125C, unless otherwise specified.)
ELECTRICAL CHARACTERISTICS OF KD1084A#285 (V
I
=5.85V, C
I
= C
O
=10
F (Tant.), T
A
= -40 to
125C, unless otherwise specified.)
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
V
O
Output Voltage
I
O
= 0 mA
T
J
= 25C
2.475
2.5
2.525
V
I
O
= 0 to 5A V
I
= 4.1 to 10V
2.45
2.5
2.55
V
V
O
Line Regulation
I
O
= 0 mA
V
I
= 4.1 to 10V T
J
= 25C
0.5
6
mV
I
O
= 0 mA
V
I
= 4.1 to 10V
1
6
mV
V
O
Load Regulation
I
O
= 0 to 5A T
J
= 25C
3
15
mV
I
O
= 0 to 5A
7
20
V
V
d
Dropout Voltage
I
O
=5 A
1.3
1.5
V
I
q
Quiescent Current
V
I
10V
5
10
mA
I
sc
Short Circuit Current
V
I
- V
O
= 5V
5.5
7
A
Termal Regulation
T
A
= 25C, 30ms pulse
0.003
0.015
%/W
SVR
Supply Voltage Rejection
f = 120 Hz,
C
O
= 25
F, I
O
= 5A
V
I
= 6
1.5V
60
72
dB
eN
RMS Output Noise Voltage
(% of V
O
)
T
A
= 25C
f =10Hz to 10KHz
0.003
%
S
Temperature Stability
0.5
%
S
Long Term Stability
T
A
= 125C
1000Hrs
0.5
%
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
V
O
Output Voltage
I
O
= 0 mA
T
J
= 25C
2.821
2.85
2.879
V
I
O
= 0 to 5A V
I
= 4.5 to 10V
2.793
2.85
2.907
V
V
O
Line Regulation
I
O
= 0 mA
V
I
= 4.5 to 10V T
J
= 25C
0.5
6
mV
I
O
= 0 mA
V
I
= 4.5 to 10V
1
6
mV
V
O
Load Regulation
I
O
= 0 to 5A T
J
= 25C
3
15
mV
I
O
= 0 to 5A
7
20
V
V
d
Dropout Voltage
I
O
=5 A
1.3
1.5
V
I
q
Quiescent Current
V
I
10V
5
10
mA
I
sc
Short Circuit Current
V
I
- V
O
= 5V
5.5
7
A
Termal Regulation
T
A
= 25C, 30ms pulse
0.003
0.015
%/W
SVR
Supply Voltage Rejection
f = 120 Hz,
C
O
= 25
F, I
O
= 5A
V
I
= 6.35
1.5V
60
72
dB
eN
RMS Output Noise Voltage
(% of V
O
)
T
A
= 25C
f =10Hz to 10KHz
0.003
%
S
Temperature Stability
0.5
%
S
Long Term Stability
T
A
= 125C
1000Hrs
0.5
%
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