LAB
MECHANICAL DATA
Dimensions in mm
1 0.6
0.8
4.6
SEME
LM7808
8 VOLT POSITIVE
VOLTAGE REGULATOR
3.6
Dia.
16.5
FEATURES
•
HERMETIC TO220 METAL OR CERAMIC
SURFACE MOUNT PACKAGES
•
SCREENING OPTIONS AVAILABLE
•
ALL LEADS ISOLATED FROM CASE
(METAL PACKAGE)
1.0
1 3 .5
1 0 .6
1 23
1 3 .7 0
2 .5 4
BSC
2. 70
BSC
•
8 VOLT REGULATOR
11.5
2.0
3.5
3.5
3.0
0.25
• OUTPUT CURRENT UP TO 1.5A
• THERMAL OVERLOAD PROTECTION
4.6
15.8
1.5
1
3
• SHORT CIRCUIT PROTECTION
• OUTPUT TRANSISTOR SOA PROTECTION
9.0
2
8.5
PIN 1 - Input
PIN 2 -Ground
PIN 3 - Output
TO220M
TO220SM
-TO220 Metal Package - Isolated
-TO220 Ceramic Surface Mount Package
Also available in TO39 Package.
ABSOLUTE MAXIMUM RATINGS
(Tcase = 25°C unless otherwise stated)
V
i
I
O
P
D
T
j
T
stg
DC Input Voltage
Output Current
Power Dissipation
Junction Temperature
Storage Temperature
35V
Internally limited
Internally limited
150°C
–65 to 150°C
Semelab plc.
Telephone (0455) 556565. Telex: 341927. Fax (0455) 552612.
Prelim. 2/94
LAB
ELECTRICAL CHARACTERISTICS
(Tcase = 25°C unless stated)
OUTPUT VOLTAGE
INPUT VOLTAGE
(unless otherwise specified)
SEME
LM7808
8
14
Test Conditions
T
j
= 25°C
I
O
= 5mA to 1A
T
j
= 25°C
I
O
= 5mA to 1.5A
I
O
= 250 to 750 mA
T
j
= 25°C
I
O
= 5mA to 1A
(V
i
= 11.5 to 25V)
Parameter
V
O
Output Voltage
Min.
7.7
P
O
£
15W
7.6
Typ.
8
8
(V
i
= 11.6 to 23V)
Max.
8.3
8.4
80
Unit
V
D
V
O
Line Regulation
(V
i
= 10.5 to 25V)
40
(V
i
= 11 to 17V)
mV
D
V
O
Load Regulation
Quiescent Current
T
j
= 25°C
T
j
= 25°C
100
mV
50
8
0.5
mA
I
d
I
d
D
Quiescent Current Change
1
mA
mV
/
°C
D
V
O
Output Voltage Drift
D
T
e
N
Output Noise Voltage
I
O
= 5mA
B = 10Hz to 100kHz
T
j
= 25°C
62
–1
40
m
V
SVR Supply Voltage Rejection
f = 100Hz
I
O
= 1A
D
(V
i
= 11.5 to 21.5V)
dB
V
d
I
sc
Dropout Voltage
T
j
= 25°C
2
V
V
O
= 100mV
T
j
= 25°C
750
mA
Short Circuit Current
V
I
= 35V
T
j
= 25°C
I
scp
Short Circuit Peak Current
2.2
A
THERMAL DATA
R
THj-case
R
THj-amb
Thermal Resistance Junction – Case
Thermal Resistance Junction – Ambient
Max. 3°C / W
Max. 50°C / W
Semelab plc.
Telephone (0455) 556565. Telex: 341927. Fax (0455) 552612.
Prelim. 2/94
Microcontroller MCU
京公网安备 11010802033920号
EEWORLD
