具有使能功能的 150mA、低 IQ、低壓降穩壓器
| Output options | Fixed Output |
| Iout (Max) (A) | 0.15 |
| Vin (Max) (V) | 5.5 |
| Vin (Min) (V) | 1.8 |
| Vout (Max) (V) | 3.7 |
| Vout (Min) (V) | 1.3 |
| Fixed output options (V) | 1.3, 1.5, 1.8, 2, 2.5, 2.8, 3, 3.3, 3.7 |
| Noise (uVrms) | 125 |
| Iq (Typ) (mA) | 0.029 |
| Thermal resistance θJA (°C/W) | 196 |
| Rating | Catalog |
| Load capacitance (Min) (μF) | 1 |
| Regulated outputs (#) | 1 |
| Features | Enable |
| Accuracy (%) | 3 |
| PSRR @ 100 KHz (dB) | 32 |
| Dropout voltage (Vdo) (Typ) (mV) | 200 |
| Operating temperature range (C) | -40 to 125 |
- Input Voltage Range: 1.8 V to 5.5 V
- Output Voltage Range: 1.3 V to 3.7 V
- Excellent Line Transient Response: ±2 mV (typical)
- Excellent PSRR: –60 dB at 1 kHz typical
- Low Quiescent Current of 29 μA typical
- Small SC70-5 and SOT-23-5 Packages
- Fast Turnon Time of 30 μs typ.
- Typical < 1 nA Quiescent Current in Shutdown
- Ensured 150-mA Output Current
- Logic Controlled Enable 0.4 V/0.9 V
- Good Load Transient Response of 50 mVpp (typical)
- Thermal Overload and Short-Circuit Protection
- -40°C to 125°C Junction Temperature Range
The LP5951 regulator is designed to meet the requirements of portable battery-powered systems providing a regulated output voltage and low quiescent current. When switched to shutdown mode via a logic signal at the Enable (EN) pin, the power consumption is reduced to virtually zero.
The LP5951 is designed to be stable with small 1-μF ceramic capacitors. The device also features internal protection against short-circuit currents and over-temperature conditions.
Performance is specified for a –40°C to 125°C temperature range.
The device is available in fixed output voltages in the range of 1.3 V to 3.7 V. For availability, please contact your local TI sales office.
