LM5146RGYR

LM5146RGYR is a synchronous buck DC/DC controller from Texas Instruments in a 20-pin VQFN (RGY) package, accepting inputs from 5.5 V to 100 V and regulating outputs from 0.8 V to 60 V. Because it drives external MOSFETs, the designer scales current and efficiency freely, which makes it a durable choice for 48 V industrial, telecom and automotive intermediate-bus converters where integrated-FET regulators run out of voltage or current headroom. The 0.8 V reference holds ±1% accuracy, the switching frequency adjusts from 100 kHz to 1 MHz, and maximum duty cycle reaches 99% for low-dropout operation. Selection advice: this is a controller, not a complete regulator - budget the external FETs, inductor and compensation network in the BOM; the RGYR code is the tape-and-reel variant rated for junction temperatures to 150 °C. Parameters verified against the TI LM5146 product page and packaging appendix (Active / Production).