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TDA8138 (5.1V+12V regulator with Disable and Reset)
(1) General Description
The TDA8138 is a monolithic dual positive voltage regulator designed to provide fixed precision output voltages of
5.1V and 12V at currents up to 1A.
A internal reset cuicuit generates a reset pulse when the output 1 decrease below the regulated voltage value.
Output 2 can be disabled by TTL input.
Shot circuit and themal protections are included.
(2) Feature
• output currents up to 1A
• ixed precision Output 1 voltage 5.1V
2%
• fixed precision Output 2 voltage 12V
2%
• output 1 with Reset facility
• output 2 with Disable by TTL input
• short circuit protection at both outputs
• thermal protection
• low drop output voltage
(3) Block Diagram
(4) Pin Description
PIN
SYMBOL
DESCRIPTION
1
V in 1
input 1
2
V in 2
input 2
3
C e
Delay capacitor
4
V dis
disable
5
GND
ground
6
RST
reset
7
n.c
8
V out 2
output 2 (12V)
9
V out 1
output 1 (5.1V)
