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 0.5V (1V guaranteed 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 3V.
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 LM2937 is stable for all ESR below 3Ω.
LM2937 Pinout
LM2937 Pin Configuration
| Pin No | Pin Name |
|---|---|
| 1 | OUTPUT |
| 2 | GND |
| 3 | INPUT |
LM2937 Key Features
- 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 0.5V at full rated load current
- Wide output capacitor ESR range, up to 3Ω
- Internal short circuit and thermal overload protection
- Reverse battery protection
- 60V input transient protection
Application
- Automotive Applications
You can download this datasheet for LM2937 3.3V 500mA Low Dropout Regulator – Datasheet from the link given below:
