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LM2931 Very Low Drop Voltage Regulators with Inhibit Function
 
LM2931 photoThe LM2931 series are very low drop regulators specifically designed for automotive applications. The very low drop voltage and the low quiescent current make them highly suitable for low noise, low power applications and in battery powered systems. In the 8 pin configuration (SO-8), fully compatible to the older L78L00 family, a shut-down 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 stand-by, decreasing the total power consumption.

Ideal for Automotive Applications
The LM2931 is protected from reverse battery installations or 2 battery jumps. During the transient, such as a load dump (60V) when the input voltage can exceed the specified maximum operating input voltage (26V), the regulator will automatically shut down to protect both internal circuits and the load.

Features
Very low dropout voltage (0.15V typ. at 10mA load)
Low quiescent current (typ 2.5 mA, at 100mA load)
Output current up to 100mA
Adjustable (from Vout=2.5V, only SO-8) and fixed (3.3V and 5V) output voltage version
Internal current and thermal limit
Load dump protection up to 60V
Reverse transient protection up to -50V
Temperature range; -40°C to 125°C
Wide range of packages: TO-92, DPAK, TO-220, SO-8 (with inhibit control)

Applications
Automotive: Body and check control, car alarms and car radios
Consumer: Portable equipment

LM2931 fixed output
LM2931 fixed output

Quiescent Current vs Input Voltage
Quiescent Current vs Input Voltage

LM2931 adjustable output
LM2931 adjustable output


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