SNOSBE5G – MARCH 2000 – REVISED APRIL 2013
LM2931-N Series Low Dropout Regulators
Check for Samples:
1
FEATURES
Very Low Quiescent Current
Output Current in Excess of 100 mA
Input-output Differential Less than 0.6V
Reverse Battery Protection
60V Load Dump Protection
−50V
Reverse Transient Protection
Short Circuit Protection
Internal Thermal Overload Protection
Mirror-image Insertion Protection
Available in TO-220, TO-92, TO-263, or SOIC-8
Packages
Available as Adjustable with TTL Compatible
Switch
DESCRIPTION
The LM2931-N positive voltage regulator features a
very low quiescent current of 1mA or less when
supplying 10mA loads. This unique characteristic and
the extremely low input-output differential required for
proper regulation (0.2V for output currents of 10mA)
make the LM2931-N 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
LM2931-N 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 LM2931-N cannot be harmed by temporary
mirror-image insertion. Familiar regulator features
such as short circuit and thermal overload protection
are also provided.
The LM2931-N family includes a fixed 5V output
(±3.8% tolerance for A grade) or an adjustable output
with ON/OFF pin. Both versions are available in a
TO-220 power package, DDPAK/TO-263 surface
mount package, and an 8-lead SOIC package. The
fixed output version is also available in the TO-92
plastic package.
•
•
•
•
•
•
•
•
•
•
2
•
Connection Diagrams
FIXED VOLTAGE OUTPUT
Figure 1. TO-220 3-Lead Power Package
Front View
Figure 2. DDPAK/TO-263 Surface-Mount Package
Top View
Figure 3. Side View
1
2
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
All trademarks are the property of their respective owners.
Copyright © 2000–2013, Texas Instruments Incorporated
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
TI [ TEXAS INSTRUMENTS ]
