IR3889MTRPBF Performance Report: Efficiency & Thermal
Bench characterization across switching frequencies and load ranges reveals key trade-offs between peak efficiency and thermal rise for the IR3889MTRPBF. Measurements covered VIN from 5 V to 12 V, VOUT targets down to 0.9 V, load sweep 0.1 A–30 A, and switching frequencies of 600 kHz, 1 MHz and 2 MHz in a 25°C ambient. This report summarizes efficiency curves, thermal profiles, root causes, and clear recommendations for POL designers. 1 — Background: Device overview & test matrix 1.1 — Key device specs and typical applications The device is a high-current synchronous point-of-load regulator wi…