Packaging information
| Package | Pins SOIC (D) | 8 |
| Operating temperature range (°C) -40 to 125 |
| Package qty | Carrier 75 | TUBE |
Features for the LP2951
- Wide input voltage range
- VIN range (new chip): 2V to 30V
- Wide output voltage range
VOUT
- Fixed option: 5.0V, 3.3V, 3V (Legacy Chip)
- Adjustable option: 1.2V to 29V
- VOUT accuracy:
- ±2% over temperature for legacy chip
- ±0.7% over temperature for new chip
- ±1% over line, load, and temperature for new chip
- Output current: Up to 100mA
- Low IQ (New Chip): 50µA (Typical)
- Low dropout: 340mV (Typical) at 100mA for new chip
- Output current limiting and thermal shutdown
- Open-Drain Error output
- Stable over a wide range of ceramic output capacitor values
- COUT range: 1µF to 100µF (New Chip)
- ESR range: 0 to 2Ω (New Chip)
- Operating junction temperature: –40°C to 125°C
- Package option:
- LP (3-pin TO-92)
- D (8-pin SOIC)
- DRG (8-pin WSON)
Description for the LP2951
The LP2951 is a wide input low-dropout regulator (LDO) supporting an input voltage range from 2V to 30V and up to 100mA of load current. LP2951 is able to output either a fixed or adjustable output from the same device. By tying the OUTPUT and SENSE pins together, and the FEEDBACK and VTAP pins together, the LP2950/LP2951 can give 5V or 3.3V fixed output voltages. Alternatively, by leaving the SENSE and VTAP pins open and connecting FEEDBACK to an external resistor divider, the output can be set to any value between 1.2V to 29V.
The LP2951 has a ERROR output that monitors the voltage at the feedback pin to indicate the status of the output voltage. The SHUTDOWN input and ERROR output can be used for sequencing multiple power supplies in the system.
The LP2951 is available in a 3-pin 4.83mm x 4.83mm TO-92(LP), an 8-pin 4.9mm x 6.0mm SOIC(D), and 8-pin 3mm x 3mm SON(DRG) package.