Pin 1 V
IN
Pin 2 Ground
Pin 3 V
OUT
Case Ground
G Package TO257
1 2 3
IP123A SERIES
IP123
A
SERIES
IP323A SERIES
LM123 SERIES
Semelab plc.
Telephone (01455) 556565. Telex: 341927. Fax (01455) 552612.
Prelim. 8/95
3 AMP
POSITIVE
VOLTAGE REGULATORS
V
I
DC Input Voltage
P
D
Power Dissipation
T
J
Operating Junction Temperature Range
T
STG
Storage Temperature Range
T
L
Lead Temperature (Soldering, 10 sec)
35V
Internally limited
See Ordering Information
65C to +150C
300C
ABSOLUTE MAXIMUM RATINGS
(T
C
= 25C unless otherwise stated)
FEATURES
0.04%/V LINE REGULATION
0.3%/A LOAD REGULATION
THERMAL OVERLOAD PROTECTION
SHORT CIRCUIT PROTECTION
SAFE OPERATING AREA PROTECTION
1% TOLERANCE
STARTUP WITH NEGATIVE VOLTAGE
( SUPPLIES) ON OUTPUT
AVAILABLE IN 5V, 12V AND 15V OPTIONS
Pin 1 V
IN
Pin 2 V
OUT
Case Ground
K Package TO3
Pin 1 V
IN
Pin 2 Ground
Pin 3 V
OUT
Case Ground
V Package TO218
1
2
3
1
2
3
Pin 1 V
IN
Pin 2 Ground
Pin 3 V
OUT
SG Package TO220SM
CERAMIC SURFACE MOUNT
1
3
2
Pin 1 V
IN
Pin 2 Ground
Pin 3 V
OUT
Case Ground
T Package TO220
1
2
3
4.8
5
5.2
4.75
5.25
25
100
14
3.0
3.0
40
60
80
56
3
4
35
2
4
TBA
4.95
5
5.05
4.85
5.15
15
50
10
1.5
1.5
40
66
80
60
3
4
35
1.5
2.5
3
4
TBA
V
O
Output Voltage
V
O
Line Regulation
V
O
Load Regulation
I
Q
Quiescent Current
I
Q
Quiescent Current
Change
V
N
Output Noise
Voltage
V
IN
Ripple Rejection
V
O
I
SC
Short Circuit Current
Long Term Stability
R
JC
Thermal Resistance
Junction to Case
I
O
= 1A
V
IN
= 7.5V
P
OUT
P
MAX
2
V
IN
= 8V to 15V
I
O
= 5mA to 3A
T
J
= Over Temp. Range
1
I
O
= 1A
V
IN
= 7.5V to 15V
T
J
= Over Temp. Range
1
V
IN
= 8V
I
O
= 5mA to 3A
T
J
= Over Temp. Range
1
V
IN
= 8V
I
O
= 5mA to 3A
T
J
= Over Temp. Range
1
V
IN
= 8V
I
O
= 5mA to 3A
T
J
= Over Temp. Range
1
I
O
= 1A
V
IN
= 7.5V to 15V
T
J
= Over Temp. Range
1
f = 10Hz to 100kHz
f = 120Hz
V
IN
= 8V to 18V
I
O
= 1A
T
J
= Over Temp. Range
1
V
IN
= 15V
V
IN
= 7.5V
K Package , V Package
G Package , T Package
SG Package
Notes
1) Applies over full temperature range:
T
J
= 55 to +150C for IP123A / IP123 / LM123
T
J
=
0 to +125C for IP323A
All other specifications apply at T
J
= 25C unless otherwise stated.
2) P
MAX
= 30W for KPack (TO3) , VPack (TO218) and GPack (TO257) Packages.
P
MAX
= 25W for TPack (TO220) Package.
P
MAX
= 15W for SGPack (TO220SM) Package.
3) All characteristics are measured with a capacitor across the input of 0.22
F and a capacitor across the output of 0.1
F.
4) All characteristics except noise voltage and ripple rejection ratios are measured using pulse techniques (t
p
10ms ,
5%).
5) Output voltage changes due to changes into internal temperature must be taken into account separately.
IP123A SERIES
IP123
A
SERIES
IP323A SERIES
LM123 SERIES
Semelab plc.
Telephone (01455) 556565. Telex: 341927. Fax (01455) 552612.
Prelim. 8/95
IP123A05
IP12305
IP323A05
LM12305
Parameter
Test Conditions
Min.
Typ.
Max.
Min.
Typ.
Max. Units
V
V
mV
mV
mA
mA
mA
Vrms
dB
A
mV
C/W
ELECTRICAL CHARACTERISTICS
(T
J
= 25C unless otherwise stated)
11.5
12
12.5
11.4
12.6
60
150
14
3.0
3.0
75
52
72
48
3
4
84
2
4
TBA
11.88
12
12.12
11.64
12.36
36
75
10
1.5
1.5
75
58
72
52
3
4
84
1.5
2.5
3
4
TBA
IP123A SERIES
IP123
A
SERIES
IP323A SERIES
LM123 SERIES
Semelab plc.
Telephone (01455) 556565. Telex: 341927. Fax (01455) 552612.
Prelim. 8/95
V
O
Output Voltage
V
O
Line Regulation
V
O
Load Regulation
I
Q
Quiescent Current
I
Q
Quiescent Current
Change
V
N
Output Noise
Voltage
V
IN
Ripple Rejection
V
O
I
SC
Short Circuit Current
I
pk
Peak Output Current
Long Term Stability
R
JC
Thermal Resistance
Junction to Case
IP123A12
IP12312
IP323A12
LM12312
Parameter
Test Conditions
Min.
Typ.
Max.
Min.
Typ.
Max.
Units
V
V
mV
mV
mA
mA
mA
Vrm
dB
A
A
mV
C/W
I
O
= 1A
V
IN
= 14.8V
P
OUT
P
MAX
2
V
IN
= 15.4V to 22V
I
O
= 5mA to 3A
T
J
= Over Temp. Range
1
I
O
= 1A
V
IN
= 14.8V to 22V
T
J
= Over Temp. Range
1
V
IN
= 15.4V
I
O
= 5mA to 3A
T
J
= Over Temp. Range
1
V
IN
= 15.4V
I
O
= 5mA to 3A
T
J
= Over Temp. Range
1
V
IN
= 15.4V
I
O
= 5mA to 3A
T
J
= Over Temp. Range
1
I
O
= 1A
V
IN
= 14.8V to 22V
T
J
= Over Temp. Range
1
f = 10Hz to 100kHz
f = 120Hz
V
IN
= 15.4V to 25.4V
I
O
= 1A
T
J
= Over Temp. Range
1
V
IN
= 15.4V
V
IN
= 15.4V
K Package , V Package
G Package , T Package
SG Package
Notes
1) Applies over full temperature range:
T
J
= 55 to +150C for IP123A / IP123 / LM123
T
J
=
0 to +125C for IP323A
All other specifications apply at T
J
= 25C unless otherwise stated.
2) P
MAX
= 30W for KPack (TO3) , VPack (TO218) and GPack (TO257) Packages.
P
MAX
= 25W for TPack (TO220) Package.
P
MAX
= 15W for SGPack (TO220SM) Package.
3) All characteristics are measured with a capacitor across the input of 0.22
F and a capacitor across the output of 0.1
F.
4) All characteristics except noise voltage and ripple rejection ratios are measured using pulse techniques (t
p
10ms ,
5%).
5) Output voltage changes due to changes into internal temperature must be taken into account separately.
ELECTRICAL CHARACTERISTICS
(T
J
= 25C unless otherwise stated)
IP123A SERIES
IP123
A
SERIES
IP323A SERIES
LM123 SERIES
Semelab plc.
Telephone (01455) 556565. Telex: 341927. Fax (01455) 552612.
Prelim. 8/95
14.85
15
15.15
14.55
15.45
45
75
10
1.5
1.5
90
56
70
50
2.5
4
105
1.5
2.5
3
4
TBA
14.4
15
15.6
14.25
15.75
75
150
14
3.0
3.0
90
50
70
46
2.5
4
105
2
4
TBA
V
O
Output Voltage
V
O
Line Regulation
V
O
Load Regulation
I
Q
Quiescent Current
I
Q
Quiescent Current
Change
V
N
Output Noise
Voltage
V
IN
Ripple Rejection
V
O
I
SC
Short Circuit Current
I
pk
Peak Output Current
Long Term Stability
R
JC
Thermal Resistance
Junction to Case
IP123A15
IP12315
IP323A15
LM12315
Parameter
Test Conditions
Min.
Typ.
Max.
Min.
Typ.
Max. Units
V
V
mV
mV
mA
mA
mA
Vrm
dB
A
A
mV
C/W
Notes
1) Applies over full temperature range:
T
J
= 55 to +150C for IP123A / IP123 / LM123
T
J
=
0 to +125C for IP323A
All other specifications apply at T
J
= 25C unless otherwise stated.
2) P
MAX
= 30W for KPack (TO3) , VPack (TO218) and GPack (TO257) Packages.
P
MAX
= 25W for TPack (TO220) Package.
P
MAX
= 15W for SGPack (TO220SM) Package.
3) All characteristics are measured with a capacitor across the input of 0.22
F and a capacitor across the output of 0.1
F.
4) All characteristics except noise voltage and ripple rejection ratios are measured using pulse techniques (t
p
10ms ,
5%).
5) Output voltage changes due to changes into internal temperature must be taken into account separately.
ELECTRICAL CHARACTERISTICS
(T
J
= 25C unless otherwise stated)
I
O
= 1A
V
IN
= 17.9V
P
OUT
P
MAX
2
V
IN
= 18.5V to 25V
I
O
= 5mA to 3A
T
J
= Over Temp. Range
1
I
O
= 1A
V
IN
= 17.9V to 25V
T
J
= Over Temp. Range
1
V
IN
= 18.5V
I
O
= 5mA to 3A
T
J
= Over Temp. Range
1
V
IN
= 18.5V
I
O
= 5mA to 3A
T
J
= Over Temp. Range
1
V
IN
= 18.5V
I
O
= 5mA to 3A
T
J
= Over Temp. Range
1
I
O
= 1A
V
IN
= 17.9V to 25V
T
J
= Over Temp. Range
1
f = 10Hz to 100kHz
f = 120Hz
V
IN
= 18.5V to 28.5V
I
O
= 1A
T
J
= Over Temp. Range
1
V
IN
= 18.5V
V
IN
= 18.5V
K Package , V Package
G Package , T Package
SG Package
IP123A SERIES
IP123
A
SERIES
IP323A SERIES
LM123 SERIES
Semelab plc.
Telephone (01455) 556565. Telex: 341927. Fax (01455) 552612.
Prelim. 8/95
0
25
50
75
100
125
-50
-25
150
0.98
1.02
0.99
1.01
Tem perature (C )
N
o
r
m
a
l
i
s
e
d
O
u
t
p
u
t
V
o
l
t
a
g
e
(
V
)
1.00
Frequency (H z)
O
u
t
p
u
t
I
m
p
e
d
a
n
c
e
(
)
10
100
1k
10k
100k
1M
0.0001
0.001
0.01
0.1
1
10
C = 0
O U T
C = 10
F
O U T
V = 10V
IN
V = 5V
O U T
I = 1A
O U T
25
50
75
100
125
0
10
20
30
40
Am bient Temperature ( C)
T
AM B
M
a
x
i
m
u
m
A
v
e
r
a
g
e
P
o
w
e
r
D
i
s
s
i
p
a
t
i
o
n
(
W
)
P
D
(
A
V
)
SA OF HEATSINKS
INFINITE
HEAT SINK
1.3 C/W
2.4 C/W
3.3 C/W
6.3 C/W
10.5 C/W
25
50
75
100
125
0
Am bient Temperature (C )
T
AM B
10
20
30
40
M
a
x
i
m
u
m
A
v
e
r
a
g
e
P
o
w
e
r
D
i
s
s
i
p
a
t
i
o
n
(
W
)
P
D
(
A
V
)
SA OF HEATSINKS
INFINITE
HEAT SINK
1.3 C/W
2.4 C/W
3.3 C/W
6.3 C/W
10.5 C/W
TYPICAL PERFORMANCE CHARACTERISTICS
OUTPUT IMPEDANCE
OUTPUT VOLTAGE
(Normalised to 1V at T
J
= 25C)
MAXIMUM AVERAGE POWER DISSIPATION
( For IP323AK, IP323K, IP323AV, IP323V)
MAXIMUM AVERAGE POWER DISSIPATION
( For IP123AK, IP123K, IP123AG, IP123G)
IP123A SERIES
IP123
A
SERIES
IP323A SERIES
LM123 SERIES
Semelab plc.
Telephone (01455) 556565. Telex: 341927. Fax (01455) 552612.
Prelim. 8/95
Frequency (H z)
R
i
p
p
l
e
R
e
j
e
c
t
i
o
n
(
d
B
)
1
10
100
1k
10k
100k
1M
20
40
60
80
100
V = 5V
O U T
C = 0
O U T
T = 25C
J
V = 13V D C + 3.5V rms
IN
I = 50mA
OU T
I = 3A
O U T
Output Voltage (V)
R
i
p
p
l
e
R
e
j
e
c
t
i
o
n
(
d
B
)
0
5
10
15
20
25
50
60
70
80
90
T = 25C
J
V V = 8V DC + 3.5V rms
IN
O U T
I = 1A
O U T
F = 120Hz
Input Output Differential (V)
O
u
t
p
u
t
C
u
r
r
e
n
t
(
A
)
0
5
10
15
20
25
30
35
0
1
2
3
4
5
6
I = 3A
OUT
I = 1A
OUT
I = 0.5A
OUT
V = 100mV
OUT
I
n
p
u
t
O
u
t
p
u
t
D
i
f
f
e
r
e
n
t
i
a
l
(
V
)
0.50
1.00
1.50
2.00
2.50
Junction Temperature (C)
0
25
50
75
100 125
-50
-25
150
-75
T = 55C
J
T = 25C
J
T = 150C
J
TYPICAL PERFORMANCE CHARACTERISTICS
DROPOUT VOLTAGE
RIPPLE REJECTION
RIPPLE REJECTION
Input Voltage (V)
O
u
t
p
u
t
C
u
r
r
e
n
t
(
m
A
)
5
10
15
20
25
30
35
3.50
4.00
4.50
5.00
5.50
6.00
6.50
V = 5V
O UT
T = 25C
J
I = 1A
O UT
Q
u
i
e
s
c
e
n
t
C
u
r
r
e
n
t
(
m
A
)
3.50
4.00
4.50
5.00
5.50
Junction Temperature (C )
0
25
50
75
100 125
-50
-25
150
-75
I = 1A
O U T
V = 5V
O U T
V = 10V
IN
QUIESCENT CURRENT
QUIESCENT CURRENT
CURRENT LIMIT
IP123A SERIES
IP123
A
SERIES
IP323A SERIES
LM123 SERIES
Semelab plc.
Telephone (01455) 556565. Telex: 341927. Fax (01455) 552612.
Prelim. 8/95
APPLICATIONS INFORMATION
R EG U LAT O R
IN P U T
O UT P UT
1
3 G N D
2
C 1*
0.22
F
C 2**
R E G ULA TO R
INP U T
O UT P UT
1
3 G N D
2
C1
0.22
F
R 1
R2
RE G U LA TO R
IN PU T
O U T PU T
1
3
2
C1
0.22
F
R 1
OU T
I
* Required if the regulator is located far from the power supply filter.
** Although no output capacitor is needed for stability, it does help
transient response. If needed, use a 0.1
F ceramic disk.
V
OUT
= V
REG
+ (V
REG
/ R1 + I
Q
) R2
V
REG
/ R1 > 3 I
Q
( R1 + R2 )
Load Regulation (L
r
)
(L
R
of regulator)
R1
[ ]
V
REG
I
OUT
=
+ I
Q
R1
I
Q
= 3.0mA over line and load changes.
FIXED OUTPUT REGULATOR
ADJUSTABLE OUTPUT REGULATOR
CURRENT REGULATOR
Part
KPack
GPack
TPack
VPack
SGPack
Temp.
Number
(TO3)
(TO257) (TO220) (TO218)
TO220SM
Range
IP123Axxzz
-55 to +150C
IP123xxzz
"
LM123xxzz
"
IP323Axxzz
0 to +125C
Order Information
Note:
xx = Package Code
(K, G, T, V, SM)
eg.
IP123AK15
zz = Voltage Code
(05, 12, 15)
IP123ASG05
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