L79
Datasheet
Negative voltage regulators
Features
1
3
D PAK
1
2
2
3
TO-220FP
•
•
•
•
•
•
Output current up to 1.5 A
Output voltages: -5, -8, -12, and -5 V
Thermal overload protection
Short-circuit protection
Output SOA protection
Output tolerance 2% (AC version) or 4% (C version) at 25 °C
1
TO-220
2
3
Description
The
L79
series of three-terminal negative regulators is available in TO-220,
TO-220FP and D²PAK packages and several fixed output voltages, making it useful
in a wide range of applications.
These regulators can provide local on-card regulation, eliminating the distribution
problems associated with single point regulation; furthermore, having the same
voltage option as the L78 positive standard series, they are particularly suited for split
power supplies. If adequate heat sinking is provided, they can deliver over 1.5 A
output current.
Although designed primarily as fixed voltage regulators, these devices can be used
with external components to obtain adjustable voltages and currents.
Maturity status link
L79
DS0428
-
Rev 24
-
January 2019
For further information contact your local STMicroelectronics sales office.
www.st.com
L79
Maximum ratings
3
Maximum ratings
Table 1.
Absolute maximum ratings
Symbol
V
I
I
O
P
D
T
STG
T
OP
DC input voltage
Output current
Power dissipation
Storage temperature range
Operating junction temperature range
for L79xxC
for L79xxAC
Parameter
Value
-35
Internally limited
Internally limited
-65 to 150
0 to 150
0 to 125
°C
°C
Unit
V
Note:
Note: Absolute maximum ratings are those values beyond which damage to the device may occur. Functional
operation under these condition is not implied.
Table 2.
Thermal data
Symbol
R
thJC
R
thJA
Parameter
Thermal resistance junction-case
Thermal resistance junction-ambient
D²PAK
3
62.5
TO-220
5
50
TO-220FP
5
60
Unit
°C/W
°C/W
DS0428
-
Rev 24
page 4/29