The LP2950 and LP2951 devices low-dropout voltage regulators that can accommodate a wide input supply-voltage range of up to 30V. The easy-to-use, 3-pin LP2950 is available in fixed-output voltages of 5V and 3.3V. However, the 8-pin LP2951 device 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 andV_TAP pins together, the LP2951 device outputs a fixed 5V or 3.3V (depending on the version). Alternatively, by leaving the SENSE andV_TAP pins unconnected and connecting FEEDBACK to an external resistor divider, the output can be set to any value between 1.2V to 30V.

The LP2951 has a error flag output (ERROR) 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 LP295x devices are stable with small ceramic output capacitors, allowing for a small overall solution size. The LP295x devices has an output tolerance of 1% across line, load, and temperature variation (for the new chip) and is capable of delivering 100mA of continuous load current. This device includes integrated thermal shutdown, current limit, and undervoltage lockout (UVLO) features. These devices deliver excellent line and load transient performance. The operating ambient temperature range of the device is –40°C to 125°C.