LP2950-33LPRE3

IC REG LINEAR 3.3V 100MA TO92-3

1 Features

• Wide input voltage range

– VIN range : 2V to 30V

• Wide output voltage range VOUT

– Fixed option: 3V (legacy Chip), 3.3V, 5.0V

– Adjustable option: 1.2V to 29V

• Output current: 100mA

• VOUT accuracy:

– ±2% over line, load, and temperature (legacy chip)

– ±1% over line, load, and temperature (new chip)

• Quiescent current IQ (new chip): 50μA (typical)

• Low dropout (new chip):: 340mV (typical)

• Output current limiting and thermal shutdown

• 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)

2 Applications

• Grid Infrastructure

• Factory Automation

• Motor Drives

• Building Automation

3 Description

The LP2951 is a wide input low-dropout regulator (LDO) supporting an input voltage range from 2V to 30V and can supply up to 100mA of load current. The 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 LP2951 gives 3.3V or 5V fixed output voltages. Alternatively, leave the SENSE and VTAP pins open and connect FEEDBACK to an external resistor divider. This configuration allows the output to be set to any value between 1.2V to 29V.

The LP2951-Q1 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 are used for sequencing multiple power supplies in the system.