LP2951-33QDRGRQ1

The LP2951-xx-Q1 devices are bipolar, low-dropout voltage regulators that can accommodate a wide input supply-voltage range of up to 35 V. The 8-pin LP2951-xx-Q1 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-xxQ1 outputs a fixed 5 V and 3.3 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. The 8-pin LP2951-xx-Q1 also offers additional functionality that makes it particularly suitable for battery-powered applications. For example, a logic-compatible shutdown feature allows the regulator to be put in standby mode for power savings. In addition, there is a built-in supervisor reset function in which the ERROR output goes low when V_OUT drops by 6% of its nominal value for whatever reasons – due to a drop in V_IN, current limiting, or thermal shutdown. The LP295x-xx-Q1 devices are designed to minimize all error contributions to the output voltage. With a tight output tolerance (0.5% at 25°C), a very low output voltage temperature coefficient (20 ppm typical), extremely good line and load regulation (0.3% and 0.4% typical), and remote sensing capability, the parts can be used as either low-power voltage references or 100-mA regulators.

Applications

• Automotive Power
• Battery to MCU Regulator
• Sensor Supply
• Infotainment
• Body Control Module
• Secondary Side Regulation
• Point of Load Regulation

Key features

• Qualified for Automotive Applications
• Wide Input Range: Up to 35 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
• 8-Pin Package – Fixed Voltages: 5 V/ADJ and 3.3 V/ADJ
• Low-Voltage Error Signal on Falling Output
• Shutdown Capability
• Remote Sense Capability for Optimal Output Regulation and Accuracy