The LM2990 is a three-terminal, low dropout, 1-ampere negative voltage regulator available with a fixed output voltage of −12v. The LM2990 uses new circuit design techniques to provide low dropout and low quiescent current. The dropout voltage at 1A load current is typically 0.6V and a guaranteed worst-case maximum of 1V over the entire operating temperature range.
The quiescent current is typically 1 mA with a 1A load current and an input-output voltage differential greater than 3V. A unique circuit design of the internal bias supply limits the quiescent current to only 9 mA (typical) when the regulator is in the dropout mode (VOUT − VIN ≤ 3V). Output voltage accuracy is guaranteed to ±5% overload and temperature extremes.
LM2990 Pinout
LM2990 Pin Configuration
| Pin No | Pin Name |
|---|---|
| 1 | OUTPUT |
| 2 | INPUT |
| 3 | GROUND |
LM2990 Key Features
- 5% output accuracy over entire operating range
- Output current in excess of 1A
- Dropout voltage typically 0.6V at 1A load
- Low quiescent current
- Internal short circuit current limit
- Internal thermal shutdown with hysteresis
- Functional complement to the LM2940 series
Application
- Post switcher regulator
- Local, on-card, regulation
- Battery operated equipment
You can download this datasheet for LM2990 -12V/1A Negative Low Dropout Regulator – Datasheet from the link given below:
