LM2931XX_10 Datasheet, PDF (1/21 Pages) STMicroelectronics – Very low drop voltage regulators with inhibit function

LM2931XX, LM2931AXX33
LM2931AXX50
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 and 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 with the older L78Lxx family, a
shutdown logic control function is available.
This means that when the device is used as a
local regulator it is possible to put a part of the
board in standby, decreasing total power
consumption. Ideal for automotive applications,
LM2931xx is protected from reverse battery
installations or 2 battery jumps. During the
transient, such as a 60 V load dump, when the
DPAK
TO-92
SO-8
input voltage can exceed the specified maximum
operating input voltage of 26 V, the regulator
automatically shuts down to protect both internal
circuitry and the load.
Table 1.
Device summary
Order codes
DPAK
TO-92 (Bag)
LM2931ADT50R
LM2931AZ50R
SO-8
LM2931AD33R
LM2931AD50R
LM2931D-R
Output voltages
3.3 V
5.0 V
2.5 to 26 V
May 2010
Doc ID 6740 Rev 19
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