Texas Instruments' LM51231-Q1 is a wide input range synchronous boost controller that employs peak-current-mode control. The device's wide input range supports automotive cold-crank and load dump. The input voltage is 0.8 V (minimum) when the BIAS is equal to or greater than 3.8 V. The output voltage can be dynamically programmed by using the tracking function. The bypass mode operation is automatically entered when the VSUPPLY > VLOAD, eliminating the body diode drop of the high-side MOSFET.

The switching frequency is dynamically programmed with an external resistor from 100 kHz to 2.2 MHz. The AM band interference can be minimized by switching at 2.2 MHz, allowing for a small solution size and a fast-transient response. The controller has built-in protection features such as peak current limit, which is constant over the VSUPPLY, overvoltage protection, and thermal shutdown. External clock synchronization, programmable spread-spectrum modulation, and a leadless package with minimal parasitic can reduce EMI and avoid cross talk. Additional features include line UVLO, FPWM, diode emulation, DCR inductor current sensing, programmable soft-start, and a power-good indicator.