Voltage Regulators
1
Publication date: December 2001 SFF00006CEB
AN79Lxx/AN79LxxM Series
3-pin negative output voltage regulator (100 mA type)
a73 Overview
The AN79Lxx series and the AN79LxxM series are
3-pin, fixed negative output type monolithic voltage
regulators.
Stabilized fixed output voltage is obtained from un-
stable DC input voltage without using any external compo-
nents. 12 types of output voltage are available: −4V, −5V,
−6V, −7V, −8V, −9V, −10V, −12V, −15V, −18V, −20V
and −24V. They can be used widely in power circuits with
current capacity of up to 100mA.
a73 Features
• No external components
• Output voltage: −4V, −5V, −6V, −7V, −8V, −9V,−10V,
−12V, −15V, −18V, −20V, −24V
• Built-in overcurrent limit circuit
• Built-in thermal overload protection circuit
SSIP003-P-0000
AN79Lxx series Unit: mm
HSIP003-P-0000B
AN79LxxM series Unit: mm
5.0±0.2
5.1±0.2
13.5±0.5
(1.0)
(1.0)
4.0±0.2
2.3±0.2
0.6±0.15
0.43
+0.1
–0.05
2.54
0.43
+0.1
–0.05
213
2.6 typ.
1.6 max.
1.8 max.
4.6 max.
3.0
1.5 1.5
321
0.48 max. 0.58 max. 0.44 max.
4.25 max.
2.6 max.
0.8 min.
a73 Block Diagram (AN79Lxx series)
2
1
3
Common
(1)
Output
(3)
Input
(2)
Starter
Voltage
Reference
Error Amp.
+
−
R1
Q1
Pass Tr.
RSC
Current
Limiter
Thermal
Protection
R2
Note) The number in ( ) shows the pin number for the AN79LxxM series.
1 : Common
2 : Input
3 : Output
1 : Output
2 : Common
3 : Intput
Note) The packages (SSIP003-P-0000 and HSIP003-
P-0000B) of this product will be changed to
lead-free type (SSIP003-P-0000S and
HSIP003-P-0000Q). See the new package di-
mensions section later of this datasheet.