TPS5120

The TPS5120 from Texas Instruments is a dual-channel, high-efficiency synchronous buck controller designed for versatile power management applications. It features independent dual outputs that operate 180 degrees out of phase, which helps reduce input current ripple and the need for larger input capacitance. The device supports a wide input voltage range from 4.5V to 28V and allows for adjustable output voltages down to 0.9V.

Key operational features include pin-selectable PWM/SKIP mode for optimizing efficiency under light loads, and synchronous buck operation that can achieve up to 95% efficiency. Each channel has separate standby control and overcurrent protection. The controller also includes programmable short-circuit protection, low supply current (1 mA), and shutdown current (1 nA). High-speed error amplifiers and sequencing capabilities, achieved by selecting softstart capacitor values, contribute to system reliability. The TPS5120 is available in a 30-pin TSSOP package.

This controller is suitable for applications requiring efficient and flexible power conversion. Its design considerations include minimizing input capacitance cost and extending battery life under various load conditions. The integrated MOSFET drivers are designed to drive N-channel MOSFETs, simplifying the power supply design and reducing external component count.