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STV8131

P1-P3P4-P6P7-P8
February 2009 Rev 2 1/8
1
STV8131
5 V and 8 V voltage regulator
Features
■ Output currents up to 1 A
■ Fixed precision output 1 voltage 5 V ± 2%
■ Fixed precision output 2 voltage 8 V ± 2%
■ Output 1 with disable by TTL input
■ Output 2 with disable by TTL input
■ Short circuit protection at both outputs
■ Thermal protection
■ Low drop output voltage
Description
The STV8131 is a monolithic dual positive voltage
regulator designed to provide fixed precision
output voltages of 5 V and 8 V at currents up to
1A.
Each output can be disabled separately by a TTL
input.
Short circuit and thermal protections are included.
Figure 1. Pin connections
Table 1. Device summary
Order code Packaging
STV8131 Tray
www.st.com
Obsolete Product(s) - Obsolete Product(s)
Obsolete Product(s) - Obsolete Product(s)
Block diagram STV8131
2/8
1 Block diagram
Figure 2. Block diagram
2 Circuit description
The STV8131 is a dual voltage regulator with separate disable for each output.
The two regulation parts are supplied from one voltage reference circuit trimmed by zener
zap during EWS test.
Since the supply voltage of this last is connected at Pin 1 (V
IN1
), the regulator 2 will not work
if Pin 1 is not supplied.
The outputs stage have been realized in a Darlington configuration with a drop typical 1.2V.
For each output a disable circuit switches-off this output if a voltage lower than 0.8V is
applied at corresponding Pin (Pin 3 for output 2, Pin 5 for output 1).
7
1
4
2
6
Reference
Protection
Disable
Output 1
Disable
5
Output 2
STV8131
3
Output 1
Output 2
Input 1
Input 2
Disable
Disable
Obsolete Product(s) - Obsolete Product(s)
STV8131 Absolute maximum ratings
3/8
3 Absolute maximum ratings
4 Thermal data
Table 2. Absolute maximum ratings
Symbol Parameter Value Unit
V
IN
DC input voltage Pin 1 20 V
V
DIS
Disable Input voltage Pin 3-5 20 V
I
O1, 2
Output currents Internally limited
P
t
Power dissipation Internally limited
T
STG
Storage temperature - 65 to + 150 °C
T
J
Junction temperature 0 to + 150 °C
Table 3. Thermal data
Symbol Parameter Value Unit
R
TH
(j-c) Thermal resistance junction-case Max 3 °C/W
T
J
Recommended junction temperature Max °C
P1-P3P4-P6P7-P8

STV8131

Mfr. #:
Buy STV8131
Manufacturer:
STMicroelectronics
Description:
LDO Voltage Regulators 5V/8V Dual Positive
Lifecycle:
New from this manufacturer.
Delivery:
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