The LP2981 and LP2981A families of fixed-output, low-dropout regulators offer
exceptional, cost-effective performance for both portable and non-portable applications. Available
in fixed voltages of 2.8 V, 3 V, 3.3 V, and 5 V, the family has an output tolerance of 0.75% for
the A-grade devices (1.25% for the standard grade) and is capable of delivering 100-mA continuous
load current. Standard regulator features, such as overcurrent and overtemperature protection, are
The LP2981 and LP2981A have features that make the regulators ideal candidates for a
variety of portable applications:
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- Low dropout: A PNP pass element allows a typical dropout of 200 mV at 100-mA load
current and 7 mV at 1-mA load.
- Low quiescent current: The use of a vertical PNP process allows for quiescent
currents that are considerably lower than those associated with traditional lateral PNP
- Shutdown: A shutdown feature is available, allowing the regulator to consume only
0.01 µA when the ON/OFF pin is pulled low.