Voltage Regulators
1
Publication date: November 2001 SFF00011BEB
AN78xxNSP Series
3-pin positive output voltage regulator (1 A type)
a73 Overview
The AN78xxNSP series is a 3-pin fixed positive output
type monolithic voltage regulator housed in surface mount-
ing package. Stabilized fixed output voltage is obtained
from unstable DC input voltage with using minimum ex-
ternal components. 9 types of fixed output voltage are avail-
able; 5 V, 6 V, 7 V, 8 V, 9 V, 10 V, 12 V, 15 V and 18 V. They
can be used widely in power circuits with current capacity
up to 1 A.
a73 Features
• Output voltage: 5 V, 6 V, 7 V, 8 V, 9 V, 10 V, 12 V, 15 V, 18 V
• Built-in overcurrent limit circuit
• Built-in thermal overload protection circuit
• Built-in ASO (area of safe operation) protection circuit
a73 Block Diagram
SP-3SU
Unit: mm
2.30
(3.00)
(4.35)
5.30±0.10
6.50±0.20
(1.80)
(0.20)
(0.80)
(2.50)
2.30±0.10
(5.50)
9.80±0.20
5.50±0.20
2.50
4.60±0.10
0.75±0.10
0.10±0.10
1.00±0.30
1
2
3
1.00±0.20
0.55
+0.10
–0.05
Error amp.
Current
source
Voltage
reference
Starter
Pass Tr
Current
limitter
Thermal
protection
R2
R
SC
R1
1
Input
FIN
Output
C
O
C
I
C
I
≥ 0.33 µF, C
O
≥ 0.1 µF
23
a73 Pin Descriptions
Pin No. Description
1 Input Input voltage pin
2 GND Ground pin (FIN)
3 Output Output voltage pin
Note) The package of this product will be changed
to lead-free type (SP-3SUA). See the new pack-
age dimensions section later of this datasheet.