IP138A SERIES
IP138ASERIES
IP338A SERIES
IP338A SERIES
LM138 SERIES
Document 10282
iss 1
Semelab plc. Telephone +44(0)1455 556565. Fax +44(0)1455 552612.
E-mail: sales@semelab.co.uk Website: http://www.semelab.co.uk
Pin 1 – ADJ.
Pin 2 – VIN
Case – VOUT
K Package – TO–3
Pin 1 – ADJ.
Pin 2 – VOUT
Case – VIN
Q Package – TO–254
Pin 1 – ADJ.
Pin 2 – VOUT
Pin 3 – VIN
Case – VOUT
V Package – TO–218
5 AMP
POSITIVE ADJUSTABLE
VOLTAGE REGULATOR
VI–O Input - Output Differential Voltage
PDPower Dissipation
TJOperating Junction Temperature Range
TSTG Storage Temperature
TLLead Temperature (Soldering, 10 sec.)
35V
Internally limited
See Table Above
–65 to 150°C
300°C
ABSOLUTE MAXIMUM RATINGS (Tcase = 25°C unless otherwise stated)
FEATURES
• OUTPUT VOLTAGE RANGE OF 1.25 TO 35V
• 1% OUTPUT VOLTAGE TOLERANCE
(–A VERSIONS)
• 0.3% LOAD REGULATION
• 0.01% / V LINE REGULATION
• COMPLETE SERIES OF PROTECTIONS:
• CURRENT LIMITING
• THERMAL SHUTDOWN
• SOA CONTROL
12
3
!
123
Part K–Pack V–Pack Q-Pack Temp.
Number (TO–3) (TO–218) (TO-254) Range
IP138A 44-55 to +150°C
IP138 44”
LM138 44”
IP338A 44 0 to 125°C
IP338 44 ”
LM338 44 ”
Note:
To order, add the package identifier
to the part number.
eg. IP138AQ
Order Information
VREF Reference Voltage
∆VOUT Line Regulation 1
∆VIN
∆VOUT Load Regulation 1
∆IOUT
Thermal Regulation
Ripple Rejection
IADJ Adjust Pin Current
∆IADJ Adjust Pin Current
Change
IMIN Minimum Load
Current
ISC Current Limit
∆VOUT Temperature
∆TEMP Stability
∆VOUT Long Term Stability
∆TIME
enRMS Output Noise
(% of VOUT)
RθJC Thermal Resistance
Junction to Case
IOUT = 10mA
IOUT = 10mA to 5A
VIN – VOUT = 3V to 35V
P≤50W TJ= –55 to +150°C
VIN – VOUT = 3V to 35V
TJ= –55 to +150°C
IOUT = 10mA to 5A VOUT ≤5V
VOUT ≥5V
IOUT = 10mA to 5A VOUT ≤5V
TJ= –55 to +150°C VOUT ≥5V
tp= 20ms
CADJ = 0
VOUT = 10V TJ= –55 to +150°C
f = 120Hz CADJ = 10µF
TJ= –55 to +150°C
TJ= –55 to +150°C
IOUT = 10mA to 5A
VIN – VOUT = 3V to 35V
TJ= –55 to +150°C
VIN – VOUT = 35V
TJ= –55 to +150°C
VIN – VOUT ≤10V DC
TJ= –55 to +150°C 0.5ms Peak
VIN – VOUT = 30V
TJ= –55 to +150°C
TA= 125°C t = 1000 Hrs
f = 10 Hz to 10 kHz
K Package (TO–3)
1.238 1.25 1.262
1.225 1.250 1.270
0.005 0.010
0.020 0.040
515
0.1 0.3
20 30
0.3 0.6
0.002 0.010
60
60 75
45 100
0.2 5
3.5 5
58
712
0.25 1
12
0.3 1
0.001
1
1.190 1.240 1.290
0.005 0.010
0.020 0.040
515
0.1 0.3
20 30
0.3 0.6
0.002 0.010
60
60 75
45 100
0.2 5
3.5 5
58
712
1
1
0.3 1
0.001
1
V
V
% / V
mV
%
mV
%
%/W
dB
dB
µA
µA
mA
A
A
%
%
%
°C/W
IP138A SERIES
IP138ASERIES
IP338A SERIES
IP338A SERIES
LM138 SERIES
Document 10282
iss 1
Semelab plc. Telephone +44(0)1455 556565. Fax +44(0)1455 552612.
E-mail: sales@semelab.co.uk Website: http://www.semelab.co.uk
1) Regulation is measured at constant junction temperature, using pulse testing at a low duty cycle. Changes in output voltage due to
heating effects are covered under thermal regulation specifications. Load regulation is measured from the bottom of the package
for the TO–3 package.
2) Test Conditions unless othewise stated: VIN – VOUT = 5V , TJ= 25°C , IOUT = 2.5A.
Although power dissipation is internally limited, these specifications apply for dissipations of 50W and IMAX = 5A.
LM138
IP138A IP138
Parameter Test Conditions Min. Typ. Max. Min. Typ. Max. Units
IP138A SERIES
IP138ASERIES
IP338A SERIES
IP338A SERIES
LM138 SERIES
Document 10282
iss 1
Semelab plc. Telephone +44(0)1455 556565. Fax +44(0)1455 552612.
E-mail: sales@semelab.co.uk Website: http://www.semelab.co.uk
1) Regulation is measured at constant junction temperature, using pulse testing at a low duty cycle. Changes in output voltage due to
heating effects are covered under thermal regulation specifications. Load regulation is measured from the bottom of the package
for the TO–3 package and at the junction of the wide and narrow portion of the output lead for the TO–218 package.
2) Test Conditions unless othewise stated: VIN – VOUT = 5V , TJ= 25°C , IOUT = 2.5A.
Although power dissipation is internally limited, these specifications apply for dissipations of 50W and IMAX = 5A.
VREF Reference Voltage
∆VOUT Line Regulation 1
∆VIN
∆VOUT Load Regulation 1
∆IOUT
Thermal Regulation
Ripple Rejection
IADJ Adjust Pin Current
∆IADJ Adjust Pin Current
Change
IMIN Minimum Load
Current
ISC Current Limit
∆VOUT Temperature
∆TEMP Stability
∆VOUT Long Term Stability
∆TIME
enRMS Output Noise
(% of VOUT)
RθJC Thermal Resistance
Junction to Case
IOUT = 10mA
IOUT = 10mA to 5A
VIN – VOUT = 3V to 35V
P≤50W TJ= 0 to +125°C
VIN – VOUT = 3V to 35V
TJ= 0 to +125°C
IOUT = 10mA to 5A VOUT ≤5V
VOUT ≥5V
IOUT = 10mA to 5A VOUT ≤5V
TJ= 0 to +125°C VOUT ≥5V
tp= 20ms
CADJ = 0
VOUT = 10V TJ= 0 to +125°C
f = 120Hz CADJ = 10µF
TJ= 0 to +125°C
TJ= 0 to +125°C
IOUT = 10mA to 5A
VIN – VOUT = 3V to 35V
TJ= 0 to +125°C
VIN – VOUT = 35V
TJ= 0 to +125°C
VIN – VOUT ≤10V DC
TJ= 0 to +125°C 0.5ms Peak
VIN – VOUT = 30V
TJ= 0 to +125°C
TA= 125°C t = 1000 Hrs
f = 10 Hz to 10 kHz
K Package (TO–3)
V Package (TO–218)
1.238 1.25 1.262
1.225 1.250 1.270
0.005 0.010
0.020 0.040
515
0.1 0.3
20 30
0.3 0.6
0.002 0.020
60
60 75
45 100
0.2 5
3.5 10
58
612
0.25 1
12
0.3 1
0.001
1
1
1.190 1.240 1.290
0.005 0.030
0.020 0.060
525
0.1 0.5
20 50
0.3 1
0.002 0.020
60
60 75
45 100
0.2 5
3.5 10
58
612
1
1
0.3 1
0.003
1
1
V
V
% / V
mV
%
mV
%
%/W
dB
dB
µA
µA
mA
A
A
%
%
%
°C/W
LM338
IP338A IP338
Parameter Test Conditions Min. Typ. Max. Min. Typ. Max. Units
IP138A SERIES
IP138ASERIES
IP338A SERIES
IP338A SERIES
LM138 SERIES
Document 10282
iss 1
Semelab plc. Telephone +44(0)1455 556565. Fax +44(0)1455 552612.
E-mail: sales@semelab.co.uk Website: http://www.semelab.co.uk
0.5
0.4
0.3
0.2
0.1
0
0.1
-75 -50 -25 0 25 50 75 100 125 150
Temperature (˚C)
V = 10V
OUT
V = 15V
IN
= 5A
OUT
I
PRELOAD = 50mA
= 3A
OUT
I
Voltage Change (%)
0.0001
0.001
0.01
0.1
1
10
10 100 1k 10k 100k 1M
Frequency (Hz)
Output Impedance (
Ω
)
= 15V
IN
V
OUT
=10V
OUT
= 500mAI
V
ADJ
C= 0
OUT
C= 0
µ
F
ADJ
C
OUT
C= 10
= 10
µ
F
30
35
40
45
50
55
60
65
-75 -50 -25 0 25 50 75 100 125 150
Temperature (˚C)
Adjustment Current (
µ
A)
= 5A
OUT
I
1
2
4
3
-75 -50 -25 0 25 50 75 100 125 150
Temperature (˚C)
Input – Output Differential (V)
∆
V
∆
V = 100mV
OUT
= 3A
OUT
I
= 1A
OUT
I
-50 -25 0 25 50 75 100 125 150
1.23
1.24
1.25
1.26
1.27
Temperature (˚C)
Reference Voltage (V)
T
J
= 25˚C
0 5 10 15 20 25 30 35 40
0
1
2
3
4
5
Input – Output Differential (V)
Quiescent Current (m A )
T
J
= 150˚C
T
J
= -55˚C
0.1 1 10
40
50
60
70
80
Output Current (A)
Ripple Rejection (dB)
= 15V
IN
V
V
OUT
=10V
f = 120Hz
ADJ
C= 0
ADJ
C= 10
µ
F
T
CASE
= 25˚C
Output Voltage (V)
0 5 10 15 20 25 30 35
0
20
40
60
80
100
Ripple Rejection (dB)
-V
OUT
= 5V
IN
V
OUT
= 500mAI
f = 120Hz
ADJ
C = 10
µ
F
ADJ
C= 0
T
J
= 25˚C
ADJ
C= 0
Frequency (Hz)
10 100 1k 10k 100k 1M
0
20
40
60
80
100
Ripple Rejection (dB)
ADJ
C= 10
µ
F
V
OUT
= 10V
= 15V
IN
V
OUT
= 500mAI
Load Regulation Output Impedance Adjustment Current
Droput Voltage Temperature Stability Minimum Operating Current
Ripple Rejection Ripple Rejection Ripple Rejection
TYPICAL PERFORMANCE CHARACTERISTICS
IP138A SERIES
IP138ASERIES
IP338A SERIES
IP338A SERIES
LM138 SERIES
Document 10282
iss 1
Semelab plc. Telephone +44(0)1455 556565. Fax +44(0)1455 552612.
E-mail: sales@semelab.co.uk Website: http://www.semelab.co.uk
PRELOAD = 1A
0
8
14
16
6
12
4
2
10
Output Current (A)
Input – Output Differential (V)
0 5 10 15 20 25 30 35 40
PRELOAD = 0
PRELOAD = 5A
PEAK CURRENT LIMIT
DC CURRENT LIMIT
T = 25˚C
CASE
V = 5V
OUT
V = 10V
IN
0.1 1 10 100
0
Output Current (A)
T = 25˚C
CASE
PRELOAD = 0
PRELOAD = 5A
Time (ms)
2
4
6
8
10
12
14
2
4
6
8
10
12
14
-V
OUT
= 10V
IN
V
T = 25˚C
CASE
0.1 1 10 100
Output Current (A)
PRELOAD CURRENT= 0
-V
OUT
= 15V
IN
V
-V
OUT
= 20V
IN
V
-V
OUT
= 30V
IN
V
Time (ms)
0
Current Limit Current Limit Current Limit
ADJ
C= 0
= 0
OUT
C
V
OUT
=10V
0.5
Output Voltage Deviation (V)
0 10203040
Input Voltage
Change (V)
-1.5
0
1
= 50mA
OUT
I
= 25˚C
J
T
Time ( s)
µ
-0.5
0
0.5
1
-1
OUT
C= 1
µ
F
ADJ
C= 10
µ
F
ADJ
C = 10
µ
F
L
C= 1
µ
F
ADJ
C= 0
L
C= 0
0 10203040
Time ( s)
µ
Output Voltage Deviation (V)Load Current
(A)
2
-1
0
1
2
-2
4
V
OUT
=10V
VV = 15V
IN
PRELOAD = 100mA
3
-3
0
6
= 25˚C
CASE
T
Line Transient Response Load Transient Response
TYPICAL PERFORMANCE CHARACTERISTICS
IP138A SERIES
IP138ASERIES
IP338A SERIES
IP338A SERIES
LM138 SERIES
Document 10282
iss 1
Semelab plc. Telephone +44(0)1455 556565. Fax +44(0)1455 552612.
E-mail: sales@semelab.co.uk Website: http://www.semelab.co.uk
Ω
µ
Ω
Ω
Ω
Ω
OUT P
L
IN IN
IN
8
6
4
3
2
7
1
25
F
1k
5
121
25
383
5V
VV V R
R
(Max Drop 300mV) OUTPUT
RETURN
RETURN
V
LM301A
ADJ
IP138A
IN
OUT
IN OUT
1F
1k
121
1k
383
V
V
5V
ADJ
VV
2N3904
TTL
IP138A
Ω
Ω
Ω
µ
Ω
IN OUT
PP
1F 1%
249
39k
18k
100k
750
1%
3.24k
1%
ADJ
VV To
To OE
READ
WRITE
BYTE ERASE
CHIP ERASE
+24V V
IP138A
All gates 7406.
Ω
µ
Ω
Ω
Ω
Ω
Ω
THERMALLY
COUPLE
IN OUTIN
20k
50
10k
50k
12V
243
2N3906
1N4001
VVV
ADJ
IP138A
Ω
Ω
Ω
Ω
Ω
Remote Sensing 5V Regulator with Shut Down
Improving Ripple Rejection
Temperature Compensated Lead–Acid Battery Charger
OE VPP
READ 0V 5V
WRITE
BYTE 5V 21V
CHIP ERASE 12V 21V
2816 EEPROM Supply Programmer for
Read/Write Control
APPLICATIONS INFORMATION
C1 improves ripple rejection.
XCshould be small compared to R2.