LM2931XX Datasheet, PDF (1/23 Pages) STMicroelectronics – Very low drop voltage regulators with inhibit function

LM2931XX - LM2931AXX33
LM2931AXX50 - LM2931BXX50
Very low drop voltage regulators with inhibit function
Features
■ Very low dropout voltage (0.15 V typ. at 10 mA
load)
■ Low quiescent current (typ. 2.5 mA, at 100 mA
load)
■ Output current up to 100 mA
■ Adjustable (from V_OUT = 2.5 V only SO-8) and
fixed (3.3 V & 5 V) output voltage version
■ Internal current and thermal limit
■ Load dump protection up to 60 V
■ Reverse transient protection up to -50 V
■ Temperature range: -40 to 125 °C
■ Package available: TO-92, DPAK, SO-8 (with
inhibit control)
Description
The LM2931xx are very low drop regulators. The
very low drop voltage and the low quiescent
current make them particular suitable for low
noise, low power applications and in battery
powered systems. In the 8 pin configuration (SO-
8), fully compatible to the older L78Lxx family, a
shut down logic control function is available.
This means that when the device is used as a
local regulator is possible to put a part of the
Table 1. Device summary
Order codes
DPAK
TO-92
SO-8
board in stand-by decreasing the total power
consumption. Ideal for automotive application the
LM2931xx is protected from reverse battery
installations or 2 battery jumps. During the
transient, such as a a load dump (60 V) when the
input voltage can exceed the specified maximum
operating input voltage (26 V), the regulator will
automatically shut down to protect both internal
circuit and the load.
Packages
DPAK
TO-92 (BAG)
TO-92 (Ammopak) ⁽¹⁾
SO-8
LM2931AZ33R
LM2931AD33R
LM2931ADT50R
LM2931AZ50R
LM2931BZ50R
LM2931BZ50AP
LM2931AD50R
LM2931BD50R
LM2931D-R
1. Please note that in these cases pins are shaped according to tape & reel specifications.
Output voltage
3.3 V
5.0 V
5.0 V
2.5 to 26 V
July 2008
Rev 18
1/23
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