| Output options | Fixed Output |
| Iout (Max) (A) | 0.25 |
| Vin (Max) (V) | 30 |
| Vin (Min) (V) | -20 |
| Vout (Max) (V) | 5 |
| Vout (Min) (V) | 5 |
| Fixed output options (V) | 5 |
| Noise (uVrms) | 320 |
| Iq (Typ) (mA) | 0.15 |
| Thermal resistance θJA (°C/W) | 60 |
| Rating | Catalog |
| Load capacitance (Min) (μF) | 2.2 |
| Regulated outputs (#) | 1 |
| Features | Enable, Power good |
| Accuracy (%) | 2 |
| PSRR @ 100 KHz (dB) | 14 |
| Dropout voltage (Vdo) (Typ) (mV) | 470 |
| Operating temperature range (C) | -40 to 125 |
- 5V Output within 1.4% Over Temperature (A Grade)
- Easily Programmed for Snap-On/Snap-Off Output
- Ensured 250mA Output Current
- Extremely Low Quiescent Current
- Low Input-Output Voltage Required for Regulation
- Reverse Battery Protection
- Extremely Tight Line and Load Regulation
- Very Low Temperature Coefficient
- Current and Thermal Limiting
- Error Flag Signals when Output is out of Regulation
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The LP2957 is a 5V micropower voltage regulator with electronic shutdown, error flag, very low quiescent current (150μA typical at 1mA load), and very low dropout voltage (470mV typical at 250mA load current).
Output can be wired for snap-on/snap-off operation to eliminate transition voltage states where μP operation may be unpredictable.
Output crowbar (50mA typical pull-down current) will bring down the output quickly when the regulator snaps off or when the shutdown function is activated.
The part has tight line and load regulation (0.04% typical) and low output temperature coefficient (20 ppm/°C typical).
The accuracy of the 5V output is ensured at room temperature and over the full operating temperature range.
The LP2957 is available in the five-lead TO-220 and DDPAK/TO-263 packages.
