L79
Negative voltage regulators
Datasheet
-
production data
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.
TO-220
TO-220FP
D²PAK
Features
•
Output current up to 1.5 A
•
Output voltages of - 5; - 8; - 12; - 15 V
•
Thermal overload protection
•
Short circuit protection
•
Output transition SOA protection
•
Output tolerance 2% (AC version) or 4%
(C version) at 25°C
Table 1. Device summary
Order codes
TO-220
(single gauge)
L7905ACV
L7905CV
L7908CV
L7912ACV
L7912CV
L7915ACV
L7915CV
TO-220
(dual gauge)
L7905ACV-DG
L7905CV-DG
L7908CV-DG
L7912ACV-DG
L7912CV-DG
L7915ACV-DG
L7915CV-DG
L7915CP
L7912CD2T-TR
L7912CP
D²PAK
L7905ACD2T-TR
L7905CD2T-TR
L7905CP
TO-220FP
Output
voltages
-5V
-5V
-8V
- 12 V
- 12 V
- 15 V
- 15 V
June 2014
This is information on a product in full production.
DocID2149 Rev 22
1/28
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Contents
L79
Contents
1
2
3
4
5
6
7
8
9
Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Test circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Packaging mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
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L79
Maximum ratings
3
Maximum ratings
Table 2. Absolute maximum ratings
Symbol
V
I
I
O
P
D
T
STG
T
OP
DC input voltage
Output current
Power dissipation
Parameter
Value
-35
Internally limited
Internally limited
-65 to 150
for L79xxC
0 to 150
Unit
V
Storage temperature range
Operating junction temperature range
for L79xxAC
°C
°C
0 to 125
Note:
Absolute maximum ratings are those values beyond which damage to the device may occur.
Functional operation under these condition is not implied.
Table 3. 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
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