| Output options | Fixed Output |
| Iout (Max) (A) | 0.1 |
| Vin (Max) (V) | 16 |
| Vin (Min) (V) | 2.2 |
| Vout (Max) (V) | 5 |
| Vout (Min) (V) | 2.8 |
| Fixed output options (V) | 2.8, 2.9, 3, 3.3, 5 |
| Noise (uVrms) | 160 |
| Iq (Typ) (mA) | 0.065 |
| Thermal resistance θJA (°C/W) | 205 |
| Rating | Catalog |
| Load capacitance (Min) (μF) | 2.2 |
| Regulated outputs (#) | 1 |
| Features | Enable |
| Accuracy (%) | 2 |
| PSRR @ 100 KHz (dB) | 41 |
| Dropout voltage (Vdo) (Typ) (mV) | 200 |
| Operating temperature range (C) | -40 to 125 |
- Output Tolerance of
- 0.75% (A Grade)
- 1.25% (Standard Grade)
- Ultra-Low Dropout Typically:
- 200 mV at Full Load of 100 mA
- 7 mV at 1 mA
- Low IQ: 600 μA Typical at Full Load of 100 mA
- Shutdown Current: 0.01 μA Typical
- Fast Transient Response to Line and Load
- Overcurrent and Thermal Protection
- High Peak Current Capability
- Low ZOUT Over Wide Frequency Range
- –40°C to 125°C Temperature Range
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 included.
The LP2981 and LP2981A have features that make the regulators ideal candidates for a variety of portable applications:
- 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 regulators.
- Shutdown: A shutdown feature is available, allowing the regulator to consume only 0.01 μA when the ON/OFF pin is pulled low.