封裝資訊
| 封裝 | 引腳 SOT-23 (DBV) | 5 |
| 作業溫度範圍 (°C) -40 to 125 |
| 包裝數量 | 運送包裝 3,000 | LARGE T&R |
LP2981 的特色
- Input Voltage (V IN)
Range:
- Legacy chip: 2.2 V to 16 V
- New chip: 2.5 V to 16 V
- Output Voltage (V OUT) Range: 1.2 V to 5.0 V
- Output Voltage (V OUT)
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 (V OUT) accuracy over load, and temperature: ±1% (new chip)
- Output current: Up to 100 mA
- Low I Q (new chip): 69 µA at I LOAD = 0 mA
- Low I Q (new chip): 620 µA at I LOAD = 100 mA
- Shutdown current over
temperature:
- < 1 µA (legacy chip)
- ≤ 1.75 µA (new chip)
- Output current limiting and thermal protection
- Stable with 2.2-µF ceramic capacitors (new chip)
- High PSRR (new chip):
- 75 dB at 1 kHz, 45 dB at 1 MHz
- Operating junction temperature: –40°C to 125°C
- Package: 5-pin SOT-23 (DBV)
LP2981 的說明
The LP2981 is a fixed-output, low-dropout (LDO) voltage regulator supporting an input voltage range from 2.5 V to 16 V (for new chip only) and up to 100 mA of load current. The LP2981 supports an output range of 1.2 V to 5.0 V (new chip).
Additionally, the LP2981 (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 75 dB at 1 kHz and 45 dB at 1 MHz to help attenuate the switching frequency of an upstream DC/DC converter and minimize post regulator filtering.
The internal soft-start time and current-limit protection reduce inrush current during start up, thus minimizing input capacitance. Standard protection features, such as overcurrent and overtemperature protection, are included.