Packaging information
| Package | Pins SOT-23 (DBV) | 5 |
| Operating temperature range (°C) -40 to 125 |
| Package qty | Carrier 250 | SMALL T&R |
Features for the LP2981
- Input voltage (VIN)
range:
- Legacy chip: 2.2V to 16V
- New chip: 2.5V to 16V
- Output voltage (VOUT) range: 1.2V to 5.0V
- Output voltage (VOUT)
accuracy:
- ±0.75% for A-grade legacy chip
- ±1.25% for standard-grade legacy chip
- ±0.5% for new chip (A-grade and standard grade)
- Output Voltage (VOUT) accuracy over load, and temperature: ±1% (new chip)
- Output current: Up to 100mA
- Low IQ (new chip): 69µA at ILOAD = 0mA
- Low IQ (new chip): 620µA at ILOAD = 100mA
- Shutdown current over
temperature:
- < 1µA (legacy chip)
- ≤ 1.75µA (new chip)
- Output current limiting and thermal protection
- Stable with 2.2µF ceramic capacitors (new chip)
- High PSRR (new chip):
- 75dB at 1kHz, 45dB at 1MHz
- Operating junction temperature: –40°C to +125°C
- Package: 5-pin SOT-23 (DBV)
Description for the LP2981
The LP2981 and LP2981A (LP2981x) are fixed-output, low-dropout (LDO) voltage regulators supporting an input voltage range from 2.5V to 16V (for new chip only) and up to 100mA of load current. The LP2981x support an output range of 1.2V to 5.0V (new chip).
Additionally, the LP2981x (new chip) has a ±1% output accuracy across load and temperature that can meet the needs of low-voltage microcontrollers (MCUs) and processors.
In the new chip, wide bandwidth PSRR performance is 75dB at 1kHz and 45dB at 1MHz to help attenuate the switching frequency of an upstream DC/DC converter and minimize post regulator filtering.
In the new chip, the internal soft-start mechanism reduces inrush current during start up, thus minimizing input capacitance. Standard protection features, such as overcurrent and overtemperature protection, are included.