Texas Instruments

REG103UA-A

REG103UA-A Description

The REG103UA-A from Texas Instruments is a high-performance, adjustable positive linear voltage regulator designed for precision power management in compact electronic systems. With an output current capability of 500mA, it supports input voltages up to 15V and delivers an adjustable output range of 1.295V to 5.5V, making it versatile for low-voltage applications. The device features a low dropout voltage of 0.28V at 500mA, ensuring efficient operation even with tight input-output differentials. Its 65dB PSRR (120Hz) minimizes noise, making it ideal for sensitive analog and digital circuits. Packaged in an 8-SOIC tube, this regulator is ROHS3 compliant and suitable for surface-mount assembly.

REG103UA-A Features

• Adjustable Output: Customizable voltage (1.295V–5.5V) for flexible design integration.
• Low Dropout: 0.28V @ 500mA maximizes efficiency in battery-powered applications.
• High PSRR: 65dB (120Hz) ensures clean output in noisy environments.
• Low Quiescent Current: 0.7mA minimizes power waste in standby modes.
• Protection Features: Over-current and over-temperature safeguards enhance reliability.
• Enable Control: Allows power sequencing and energy-saving modes.
• Compact Package: 8-SOIC footprint suits space-constrained designs.

REG103UA-A Applications

The REG103UA-A excels in scenarios demanding stable, low-noise power with minimal dropout:

• Portable Electronics: Ideal for handheld devices, sensors, and IoT modules due to its low Iq and dropout.
• Industrial Systems: Suitable for PLCs, instrumentation, and control systems requiring high PSRR.
• Embedded Computing: Powers microcontrollers, FPGAs, and peripherals in tight voltage margins.
• Automotive Subsystems: Supports infotainment and telematics where reliability is critical.

Conclusion of REG103UA-A

The REG103UA-A stands out as a robust, efficient linear regulator for precision power delivery. Its combination of adjustability, low dropout, and high PSRR makes it a superior choice over fixed-output alternatives. While marked as Last Time Buy, its performance and protection features ensure it remains a viable solution for legacy and new designs in industrial, portable, and embedded applications. Engineers seeking a balance of efficiency, noise immunity, and compactness will find this regulator highly effective.