LP2951 is a Single Output LDO, 100mA, Adjustable, Wide Vin Range, RESET Flag

This post sponsored by Texas Instruments.

The LP2950 and LP2951 devices are bipolar, low-dropout voltage regulators that can accommodate a wide input supply-voltage range of up to 30 V. The easy-to-use, 3-pin LP2950 is available in fixed-output voltages of 5 V, 3.3 V, and 3 V. However, the 8-pin 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 outputs a fixed 5 V, 3.3 V, or 3 V (depending on the version). 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 1.235 V to 30 V. LP2951 has a rated output current of 100 mA, low dropout at 380 mV (Typ) at 100 mA, and low quiescent current at 75 µA (Typ). It has tight line regulation at 0.03% (Typ) and tight load regulation at 0.04% (Typ). There is also high VO accuracy at 1.4% at 25°C and 2% over temperature. LP2951 has low-voltage error signal on falling output and shutdown capability.

By: Rachel Kalina

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