| Output options | Fixed Output |
| Iout (Max) (A) | 0.5 |
| Vin (Max) (V) | 26 |
| Vin (Min) (V) | 6 |
| Vout (Max) (V) | 15 |
| Vout (Min) (V) | 5 |
| Fixed output options (V) | 5, 8, 10, 12, 15 |
| Noise (uVrms) | 150 |
| Iq (Typ) (mA) | 2 |
| Thermal resistance θJA (°C/W) | 42 |
| Rating | Catalog |
| Load capacitance (Min) (μF) | 10 |
| Regulated outputs (#) | 1 |
| Accuracy (%) | 5 |
| PSRR @ 100 KHz (dB) | 57 |
| Dropout voltage (Vdo) (Typ) (mV) | 500 |
| Operating temperature range (C) | -40 to 125, -40 to 85 |
- Fully Specified for Operation Over ?40°C
to 125°C - Output Current in Excess of 500 mA
- Output Trimmed for 5% Tolerance Under all Operating
Conditions - Typical Dropout Voltage of 0.5 V at Full Rated Load
Current - Wide Output Capacitor ESR Range, up to 3 Ω
- Internal Short Circuit and Thermal Overload Protection
- Reverse Battery Protection
- 60-V Input Transient Protection
- Mirror Image Insertion Protection
The LM2937 is a positive voltage regulator capable of supplying up to 500 mA of load current. The use of a PNP power transistor provides a low dropout voltage characteristic. With a load current of 500 mA the minimum input to output voltage differential required for the output to remain in regulation is typically 0.5 V (1-V ensured maximum over the full operating temperature range). Special circuitry has been incorporated to minimize the quiescent current to typically only 10 mA with a full 500-mA load current when the input to output voltage differential is greater than 3 V.
The LM2937 requires an output bypass capacitor for stability. As with most low dropout regulators, the ESR of this capacitor remains a critical design parameter, but the LM2937 includes special compensation circuitry that relaxes ESR requirements. The device is stable for all ESR below 3 Ω. This allows the use of low ESR chip capacitors.
Ideally suited for automotive applications, the LM2937 will protect itself and any load circuitry from reverse battery connections, two-battery jumps, and up to 60-V/?50-V load dump transients. Familiar regulator features such as short circuit and thermal shutdown protection are also built in.
