Dual-phase boost controller with VOUT tracking

The Texas Instruments LM5125-Q1 is a dual-phase, synchronous, boost controller. The device supplies a regulated output voltage for lower or equal input voltage, supporting VI to VOUT bypass mode to save power.

Dynamically program VOUT utilising the analog or digital ATRK/DTRK function. VI is supported down to 2.5V after start-up as the internal VCC supply is automatically switched from VBIAS to VOUT for VBIAS <4.5V. The fixed switching frequency is set between 100kHz and 2.2MHz through a resistor on the RT pin or the SYNCIN clock. The switching modes, FPWM, or diode emulation can be altered during operation.

The implemented protections include peak current limit, average input current limit, average inductor current monitor, over and under voltage protection, and thermal shutdown to protect the device and the application.