Texas Instruments LM5127-Q1 Triple Buck & Boost Controller

The Texas Instruments LM5127-Q1 features a low shutdown IQ and an ultra-low IQ sleep mode, which minimizes battery drain at no/light load condition and eliminates the need for an additional low IQ 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 V_CC 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.