TS2931 series
100mA Ultra Low Dropout Positive Voltage Regulator
Pin assignment
1. Output
2. Ground
3. Input
Pin assignment
1. Output
2. Gnd
3. Gnd
4. Feedback
5. Shutdown
6. Gnd
7. Gnd
8. Input
Input Voltage Range up to 30V
Output Current up to 100mA
General Description
The TS2931 voltage regulator features a very low quiescent current of 1mA or less when supplying 10mA loads. This
unique characteristic and the extremely low in-put-output differential required for proper regulation (0.2V for output
currents of 10mA) make the TS2931 the ideal regulator for standby power systems. Applications include memory standby
circuits, CMOS and other low power processor power supplies as well as systems demanding as much as 100mA of
output current.
Designed originally for automotive applications, the TS2931 and all regulated circuitry are protected from reverse battery
installations or 2 battery jumps. During line transients, such as a load dump (60V) when the input voltage to the regulator
can momentarily exceed the specified maximum operating voltage, the regulator will automatically shut down to protect
both internal circuits and the load. The TS2931 can not be harmed by temporary mirror-image insertion. Familiar regulator
features such as short circuit and thermal overload protection are also provided.
Fixed output of 5V is available in the popular TO-92 and SOT-89 package. An adjustable output version, with on/off
switch, is available in SOP-8 package.
Features
Very low quiescent current
Output current in excess of 100mA
Input-Output differential less than 0.6V
Reverse battery protection
Unregulated DC input can withstand +60V positive
transients and -20V reverse battery
Short circuit protection
Internal thermal overload protection
Available as adjustable with TTL compatible switch
100% electrical burn-in in thermal limit
Available in plastic SOP-8, TO-92, SOT-89 package
Application
Battery powered systems
Portable instrumentation
Avionics
Automotive Electronics
SMPS Post-Regulator
Voltage Reference
Portable/Palm top / Notebook computers
Portable consumer equipment
Radio control system
Ordering Information
Part No.
TS2931CTxx
TS2931CSxx
Operating Temp.
(Ambient)
-20 ~ +85
o
C
Package
TO-92
SOP-8
Note: Where xx denotes voltage option, available are
8.0V, 8.5V, 9.0V, 10V, 12V, 15V, 5.0V, 3.3V and
adjustable. Contact factory for additional voltage
options.
TS2931 series
1-5
2004/12 rev. A
1
2
3
4
5
