Automotive synchronous buck module combines MOSFET and boot capacitor

The Texas Instruments TPSM336xx-Q1 is a 0.6A, 1A, or 2A, 36V input, automotive synchronous step-down DC-DC power module that combines flip-chip on lead packaging, integrated power MOSFETs, an AEC-Q200-qualified inductor, and a boot capacitor in a compact and easy-to-use package. The small HotRod QFN package enhances thermal performance, enabling high-ambient-temperature operation. The spread spectrum helps attain excellent EMI performance. The device is available in two fixed output voltage options supporting 3.3V and 5V. The devices can be configured for an output voltage of 1V to 7V using a feedback divider and operated in auto or forced PWM mode through the MODE/SYNC pin. The device requires only four external components for a 3.3V and 5V fixed output design, which simplifies the PCB layout and design.

The device is designed to satisfy low standby power needs for always-on, automotive applications. Auto mode enables frequency foldback when operating at low loads, resulting in high efficiency at light loads. DRSS is used to lower the external components of the input EMI filter.