TI’s synchronous DC/DC buck regulators eliminate switch-node ringing in automotive apps

Texas Instruments (TI) introduced two 36-V, 2.1-MHz synchronous buck regulators that eliminate switch-node ringing to reduce electromagnetic interference (EMI), improve power density, and operate in deep drop-out conditions. The 2.5-A LM53625-Q1 and 3.5-A LM53635-Q1 regulators are designed for high-voltage DC/DC step-down applications such as automotive infotainment, high-end cluster, advanced driver assistance system (ADAS) and body power-supply systems. Wettable flank packaging enables optical inspection to reduce manufacturing costs. By using these step-down regulators together with TI’s WEBENCH Automotive Design tool, engineers can get their automotive designs to market faster. For more information, samples and an evaluation module, see www.ti.com/lm53635q1-pr.

Switch node ringing is inherent in all switch-mode power supplies. By reducing parasitic inductance and capacitance in the LM53625-Q1 and LM53635-Q1 regulators, these power solutions lower noise and EMI emissions by up to 15 dB at the system level, which requires less external EMI filtering, saves printed circuit board (PCB) area and simplifies compliance with CISPR 25 automotive EMI requirements. Watch a video that demonstrates how to solve automotive EMI, thermal and system challenges with TI’s LM53635-Q1.

The LM53625-Q1 and LM53635-Q1 join the recently released LM53600-Q1, LM53601-Q1, LM53602-Q1, LM53603-Q1 and LM5140-Q1 buck converters to create a complete family of controllers and regulators designed for automotive systems that draw less than 0.65 A of power to more than 10 A. All of these devices feature greater than 2-MHz switching frequency, low operating IQ and EMI reduction features.