LP2951DR

The LP2950 and LP2951 devices are bipolar, lowdropout 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 V_TAP 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 V_TAP 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.

Key features

• Applications with High-Voltage Input Power Supplies
• 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 V_0 Accuracy: 1.4% at 25°C, 2% Over Temperature
• Can Be Used as a Regulator or Reference
• Stable With Low ESR (> 2 mΩ) Capacitors
• Current- and Thermal-Limiting Features (LP2950 Only, 3-Pin Package)
• Fixed-Output Voltages of 5 V, 3.3 V, and 3 V (LP2950 Only, 3-Pin Package)
• Fixed- or Adjustable-Output Voltages: 5 V/ADJ, 3.3 V/ADJ, and 3 V/ADJ (LP2951 Only, 8-Pin Package)
• Low-Voltage Error Signal on Falling Output
• Shutdown Capability
• Remote Sense Capability for Optimal Output Regulation and Accuracy