LP3991是TI公司的一款单通道LDO产品，LP3991是用于数字应用的 300mA 线性电压稳压器，本页介绍了LP3991的产品说明、应用、特性等，并给出了与LP3991相关的TI元器件型号供参考。
LP3991 - 用于数字应用的 300mA 线性电压稳压器 - 单通道LDO - 线性稳压器(LDO) - TI公司（Texas Instruments，德州仪器）
- Input Voltage From 1.65 V to 4 V
- Output Voltage From 0.8 V to 3 V
- 1% Accuracy at Room Temperature
- 125-mV Dropout at 300-mA Load
- 50-µA Quiescent Current at 1-mA Load
- Inrush Current Controlled to 600 mA
- PSRR 65 dB at 1 kHz
- 100-µs Start-Up Time for 1.5-V VOUT
- Stable with Ceramic Capacitors as Small as 0402
- Thermal-Overload and Short-Circuit Protection
- Post DC-DC Regulator
- Battery Operated Devices
- Hand-Held Information Appliances
Operating from a minimum input voltage of 1.65 V, the LP3991 regulator has been designed to provide fixed stable output voltages for load currents up to 300 mA. This device is suitable where accurate low voltages are required from low input voltage sources and is therefore suitable for post regulation of switched mode regulators. In such applications, significant improvements in performance and EMI can be realized, with little reduction in overall efficiency. The LP3991 provides fixed outputs as low as 1.2 V from a wide input range from 1.65 V to 4 V Using the enable (EN) pin, the device may be controlled to provide a shutdown state, in which negligible supply current is drawn.
The LP3991 is designed to be stable with space-saving ceramic capacitors as small as 0402 case size.
Performance is specified for a –40°C to 125°C junction temperature range. For output voltage options, contact your local Texas Instruments sales office.
| PART NUMBER | PACKAGE | BODY SIZE (MAX) |
|---|---|---|
| LP3991 | DSBGA (4) | 1.46 mm x 0.99 mm |
