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http://www.ti.com/general/docs/suppproductinfo.tsp?distId=26&gotoUrl=https%3A%2F%2Fwww.ti.com%2Flit%2Fgpn%2Flm51231-q1″>View Datasheet
Texas Instruments LM51231-Q1 Boost Controller provides a wide input range and employs a peak current mode control. The wide input range supports automotive cold-crank and load dump. The minimum input voltage can be as low as 0.8V when BIAS is equal to or greater than 3.8V on the device. The LM51231-Q1 features an output voltage that can be dynamically programmed using the tracking function. At the same time, the bypass mode operation is automatically entered when VSUPPLY > VLOAD, eliminating the body diode drop of the high-side MOSFET. The switching frequency is dynamically programmed with an external resistor from 100kHz to 2.2MHz. Switching at 2.2MHz minimizes AM band interference and permits a small solution size and fast transient response.
The TI LM51231-Q1 boost controller implements built-in protection features such as peak current limit, which is constant over VSUPPLY, overvoltage protection, and thermal shutdown. An external clock synchronization, programmable spread spectrum modulation, and a lead-less package with minimal parasitic further 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.
