LM120A-05
LM120-05
LM7905A
LM7905
Document Number 2643
Issue: 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
Semelab Plc reserves the right to change test conditions, parameter limits and package dimensions without notice. Information furnished by Semelab is believed
to be both accurate and reliable at the time of going to press. However Semelab assumes no responsibility for any errors or omissions discovered in its use.
Semelab encourages customers to verify that datasheets are current before placing orders.
Pin 1 Ground
Pin 2 V
OUT
Case V
IN
K Package TO3
Pin 1 Ground
Pin 2 V
OUT
Case V
IN
R Package TO66
1
2
3
3
1
2
Pin 1 Ground
Pin 2 V
IN
Pin 3 V
OUT
SMD Package SMD1
Ceramic Surface Mount
!
1.5 AMP
NEGATIVE
VOLTAGE REGULATOR
FEATURES
OUTPUT VOLTAGE OF -5V
0.7% / V LINE REGULATION AVAILABLE
0.5% / A LOAD REGULATION AVAILABLE
THERMAL OVERLOAD PROTECTION
SHORT CIRCUIT PROTECTION
OUTPUT TRANSISTOR SOA PROTECTION
1% VOLTAGE TOLERANCE OPTION
(A VERSIONS)
V
I
DC Input Voltage
P
D
Power Dissipation
T
j
Operating Junction Temperature Range
T
stg
Storage Temperature
35V
Internally limited
55 to 150C
65 to 150C
DESCRIPTION
The A suffix devices provide 0.7% / V line regulation,
0.5% / A load regulation and 1% output voltage tolerance at
room temperature.
Protection features include Safe Operating Area current
limiting and thermal shutdown.
Pin 1 Ground
Pin 2 V
IN
Pin 3 V
OUT
Case V
IN
G Package TO257
IG Package TO257
*
* isolated Case on IG package
1 2 3
ABSOLUTE MAXIMUM RATINGS
(T
case
= 25C unless otherwise stated)
LM120A-05
LM120-05
LM7905A
LM7905
Document Number 2643
Issue: 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
Semelab Plc reserves the right to change test conditions, parameter limits and package dimensions without notice. Information furnished by Semelab is believed
to be both accurate and reliable at the time of going to press. However Semelab assumes no responsibility for any errors or omissions discovered in its use.
Semelab encourages customers to verify that datasheets are current before placing orders.
LM7905A
LM7905 , LM12005
LM120A05
LM12005
Parameter
Test Conditions
Min.
Typ.
Max.
Min.
Typ.
Max.
Units
-4.9
-5
-5.1
-4.8
-5.2
3
25
3
50
1
25
2
50
25
100
25
100
1
1.9
1
2
0.2
0.4
0.2
0.5
100
54
54
1.4
5
0.6
1.2
2.4
3.3
0.2
-7.3
-4.95
-5
-5.05
-4.85
-5.15
3
10
3
10
1
4
1
12
25
35
25
35
1
1.9
1
2
0.2
0.4
0.2
0.5
100
58
58
1.4
5
0.6
1.2
2.4
3.3
0.2
-7.3
V
mV
mV
mA
mA
mV
dB
V
m
W
A
mV
C
V
Output Voltage
Line Regulation
Load Regulation
Quiescent Current
Quiescent Current
Change
Output Noise
Voltage
Ripple Rejection
Dropout Voltage
Output Resistance
Short Circuit
Current
Peak Output
Current Average
Temperature
Coefficient of V
O
Input Voltage required to
maintain line regulation
I
O
= 500mA
V
IN
= -10V
I
O
= 5mA to I
MAX
V
IN
= -7.5V to -20V
P
D
P
MAX
T
J
= -55 to 150C
V
IN
= -7V to -25V
I
O
= 0.5 I
MAX
V
IN
= -7.5V to -20V
T
J
= -55 to 150C
V
IN
= -8V to -12V
I
O
I
MAX
T
J
= -55 to 150C
I
O
= 5mA to 1.5A
V
IN
= -10V
I
O
= 5mA to I
MAX
T
J
= -55 to 150C
I
O
0.5 I
MAX
V
IN
= -10V
T
J
= -55 to 150C
I
O
= 5mA to I
MAX
V
IN
= -10V
T
J
= -55 to 150C
f = 10Hz to 100kHz
V
IN
= -10V
f = 120Hz
I
O
I
MAX
V
IN
= -8V to -18V
I
O
0.5 I
MAX
T
J
= -55 to 150C
I
O
= I
MAX
f = 1 kHz
V
IN
= -35V
V
IN
= -10V
I
O
= 5mA
I
O
I
MAX
1) All characteristics are measured with a capacitor across the input of 0.22
mF and a capacitor across the output of 0.1mF.
All characteristics except noise voltage and ripple rejection ratio are measured using pulse techniques (t
p
10ms, d 5%). Output
voltage changes due to changes in internal temperature must be taken into account separately.
2) Test Conditions unless otherwise stated:P
MAX
= 10W for SMD , P
MAX
= 20W for all other package devices
I
MAX
= 1.0A , T
J
= 25C
V
O
DV
O
DV
O
I
Q
DI
Q
V
N
DV
IN
DV
O
R
O
I
sc
I
pk
LM120A-05
LM120-05
LM7905A
LM7905
Document Number 2643
Issue: 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
Semelab Plc reserves the right to change test conditions, parameter limits and package dimensions without notice. Information furnished by Semelab is believed
to be both accurate and reliable at the time of going to press. However Semelab assumes no responsibility for any errors or omissions discovered in its use.
Semelab encourages customers to verify that datasheets are current before placing orders.
G N D
V
IN
V
OU T
C1 *
2. 2
F
T A N T .
C2 * *
1
F
T A N T .
I N PU T
O U T P U T
G N D
V
IN
V
OU T
C 1
2. 2
F
T A N T .
I N PU T
O U T P U T
R 1
R 2
C 2
1
F
T A N T .
R 1
G N D
V
IN
V
OU T
C 1
2. 2
F
T A N T .
I N PU T
O U T P U T
I
O U T
C 2
1
F
T A N T .
Fixed Output Regulator
*
Required if the regulator is located far from
the power supply.
** Required for stability. 25
mF electrolytic may
be substituted.
Current Regulator
Adjustable Output Regulator
APPLICATIONS INFORMATION
(R1+R2)
V
OUT
V
REG
R1
V
REG
I
OUT
=
+ I
Q
R1
Part KPack
RPack
G/IGPack SMDPack
Temp.
Number
(TO3)
(TO66)
(TO257)
SMD1
Range
LM7905A
-55 to +150C
LM7905
"
LM120A-05
"
LM120-05
"
Note:
To order, add the
package identifier to the
part number.
eg.
LM7905AK
LM120SMD-05
Order Information
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