The LM2991 is a low dropout adjustable negative regulator with an output voltage range between −3V to −24V. The LM2991 provides up to 1A of load current and features an On /Off pin for remote shutdown capability. The LM2991 uses new circuit design techniques to provide a low dropout voltage, low quiescent current, and low-temperature coefficient precision reference.
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).
LM2991 Pinout
LM2991 Pin Configuration
| Pin No | Pin Name |
|---|---|
| 1 | ADJUST |
| 2 | ON/OFF |
| 3 | INPUT |
| 4 | GND |
| 5 | OUTPUT |
LM2991 Key Features
- 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
- TTL, CMOS compatible ON/OFF switch
Application
- Post switcher regulator
- Local, on-card, regulation
- Battery operated equipment
You can download this datasheet for LM2991 Adjustable Negative Low Dropout Voltage Regulator – Datasheet from the link given below:
