Document
Features
Output current up to 100 mA Output voltages of -5; -8;-12; -15 V Thermal overload protection Short-circuit protection No external components are required Output tolerance + 4%
L79L
Negative voltage regulators
Datasheet - production data
Description
The L79L series of three-terminal negative regulators employ internal current limiting and thermal shutdown, making them essentially indestructible. If adequate heat-sink is provided, they can deliver up to 100 mA output current. They are intended as fixed voltage regulators in a wide range of applications including local or oncard regulation for elimination of noise and distribution problems associated with single-point regulation. In addition, they can be used with power pass elements to make high-current voltage regulators. The L79L series used as Zener diode/resistor combination replacement, offers an effective output impedance improvement of typically two orders of magnitude, along with lower quiescent current and lower noise.
December 2017
DocID2511 Rev 19
This is information on a product in full production.
1/23
www.st.com
Contents
L79L
Contents
1 Diagram ............................................................................................ 3
2 Pin configuration ............................................................................. 4
3 Maximum ratings ............................................................................. 5
4 Electrical characteristics ................................................................ 6
5 Package information ....................................................................... 9
5.1 TO-92 package information............................................................... 9
5.2 TO-92 packing information .............................................................. 10
5.3 TO-92 Ammopak packing information ............................................. 12 5.4 SO-8 package information .............................................................. 14 5.5 SO-8 packing information................................................................ 16
5.6 SOT-89 package information .......................................................... 17 5.7 SOT-89 packing information............................................................ 20
6 Ordering information..................................................................... 21
7 Revision history ............................................................................ 22
2/23
DocID2511 Rev 19
L79L
1
Diagram
Figure 1: Schematic diagram
Diagram
DocID2511 Rev 19
3/23
Pin configuration
2
Pin configuration
Figure 2: Pin connection (top view, bottom view for TO-92)
L79L
Figure 3: Test circuit
4/23
DocID2511 Rev 19
L79L
3
Maximum ratings
Maximum ratings
Table 1: Absolute maximum ratings
Symbol
Parameter
Value
Unit
VI
IO PD TSTG
TOP
DC input voltage
Output current Power dissipation Storage temperature range
Operating junction temperature range
.