Fixed 5V LDO Voltage Regulator, 100mA, SOIC-8

The Texas Instruments LP2951-50D is a highly versatile, low-dropout (LDO) voltage regulator designed for stable and efficient power management. This single-output regulator delivers a fixed 5V output with a maximum current of 100mA, making it ideal for a wide range of low-power electronic applications. It accommodates an exceptionally broad input voltage range from 5.4V up to 30V, with a typical low dropout voltage of just 380mV, ensuring reliable operation even as the input supply approaches the output level.

A key feature of this device is its dual-mode capability. By default, it is configured as a fixed 5V regulator by connecting the OUTPUT and SENSE pins together and the FEEDBACK and VTAP pins together. However, it can also be easily reconfigured for adjustable output. By leaving the SENSE and VTAP pins open and implementing an external resistor divider on the FEEDBACK pin, the output voltage can be set to any value between 1.235V and 30V, offering significant design flexibility from a single component.

Engineered for performance and reliability, the LP2951-50D incorporates several advanced features. It boasts a typical low quiescent current of just 75µA, enhancing efficiency in battery-powered devices. It provides exceptionally tight regulation with 0.03% typical line regulation and 0.04% typical load regulation, ensuring a stable output despite fluctuations in input voltage or load current. Built-in current limiting and thermal shutdown protection safeguard the regulator and the downstream circuitry from damage. An error flag output provides a low-voltage signal to indicate when the output is falling out of regulation, enabling proactive system monitoring.

Housed in a compact, surface-mount SOIC-8 package, this regulator is designed for modern PCB assemblies. It is a green product, manufactured without antimony or brominated flame retardants, aligning with environmental manufacturing standards. Its robust operating range of