ZHCS227G June 2011 – April 2024 LP2951-Q1
PRODUCTION DATA
The LP2951-Q1 is a bipolar, low-dropout voltage regulator that can accommodate a wide input supply voltage range of up to 30 V. The 8-pin LP2951-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 VTAP pins together, the LP2951-Q1 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.
The 8-pin LP2951-Q1 also offers additional functionality that makes this device particularly designed 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 VOUT drops by 6% of the nominal value for whatever reason (for example, such as a drop in VIN, current limiting, or thermal shutdown).
The LP2951-Q1 is 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 device can be used as either a low-power voltage reference or a 100-mA regulator.