LP2951-33DRGR

具有电源正常指示和使能功能的 100mA、30V、低压降稳压器

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1 Features

• Wide Input Range: Up to 30 V

• Rated Output Current of 100 mA

• Low Dropout: 380 mV (Typ) at 100 mA

• Low Quiescent Current: 75 μA (Typ)

• Tight Line Regulation: 0.03% (Typ)

• Tight Load Regulation: 0.04% (Typ)

• High VO Accuracy

– 1.4% at 25°C

– 2% Over Temperature

• Can Be Used as a Regulator or Reference

• Stable With Low ESR (>12 mΩ) Capacitors

• Current- and Thermal-Limiting Features

• LP2950 Only (3-Pin Package)

– Fixed-Output Voltages of 5 V, 3.3 V, and 3 V

• LP2951 Only (8-Pin Package)

– Fixed- or Adjustable-Output Voltages:5 V/ADJ, 3.3 V/ADJ, and 3 V/ADJ

– Low-Voltage Error Signal on Falling Output

– Shutdown Capability

– Remote Sense Capability for Optimal Output Regulation and Accuracy

2 Applications

• Applications with High-Voltage Input

• Power Supplies

3 Description

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.