TPS5124

The TPS5124 from Texas Instruments is a dual independent, high-efficiency synchronous step-down controller designed for low-voltage, high-current power supply applications. It operates with either a 5-V or 12-V bus voltage and features voltage-mode PWM control with a maximum switching frequency of 500 kHz.

Key features include an adjustable output voltage down to 0.9 V, 180° out-of-phase control to minimize input current ripple, and individual standby and soft-start for each channel, facilitating easy power sequencing. The device incorporates RDS(on) overcurrent detection with temperature compensation, eliminating the need for a current sense resistor. It also includes overvoltage and undervoltage protection, a built-in boot-strap diode, and a built-in 5-V linear regulator.

This controller is suitable for applications such as consumer game systems, DSP applications, digital set-top boxes, and VGA and sound cards. It is housed in a 30-pin TSSOP package with dimensions of 7.8 mm x 6.4 mm.

The TPS5124 offers a resistor-less current protection mechanism and a built-in boost diode, simplifying system design and reducing external component count. Additional features like undervoltage lockout, overvoltage, undervoltage, and programmable short-circuit protection enhance system reliability.