The LM5127-Q1 is a full featured, wide input range three channel DC/DC controller which supports flexible topology (Boost/Buck) with peak current mode control. The device is designed as an integrated one-chip solution for the front-stage power supply in automotive infotainment, cluster, body control, as well as ADAS systems.

The input voltage range covers automotive cold-cranking and load dump scenarios. The switching frequency is dynamically programmed in the range of 100 kHz to 2.2 MHz with an external resistor. Switching at 2.2 MHz minimizes AM band interference and allows for a small solution size and fast transient response.

The device features a low shutdown I_Q and an ultra-low I_Q sleep mode, which minimizes battery drain at no/light load condition and eliminates the need for an additional low I_Q LDO regulator as the CAN supply during standby.

The device includes flexible topology channels that support boost or SEPIC, and two independent single-phase bucks or a dual-phase buck to serve as a high current automotive processor supply. In boost mode, the device supports bypass operation which eliminates the need for an external bypass switch. In buck mode, the device supports low dropout operation to minimize dropout voltage. The battery monitor detects low battery voltage and signals when a backup process should start.

Minimal power dissipation is realized with a low current limit threshold and the use of an external VCC supply. The device has built-in protection features such as peak current limit which is constant over VIN, optional hiccup mode overload protection, overvoltage protection, and thermal shutdown.

External clock synchronization, programmable spread spectrum switching frequency, as well as a leadless package with minimal parasitics help to reduce EMI and avoid cross talk. Additional features include FPWM, DCR sensing, programmable soft start, a precision reference, and power-good indicators.