The TPS549D22RVFT is a Texas Instruments 40V, 40A synchronous step-down converter with integrated MOSFETs. It features D-CAP3 control mode, 500 kHz to 1.5 MHz programmable switching frequency, adaptive on-time, and comprehensive protection. Packaged in a thermally-enhanced VQFN-HR package rated for -40C to +125C.<\/p>\n
| Input Voltage<\/td>\n | 4.5 V to 40 V<\/td>\n<\/tr>\n | |||||||||||||||
| Corriente de salida<\/td>\n | 40 A<\/td>\n<\/tr>\n | |||||||||||||||
| Control Mode<\/td>\n | D-CAP3<\/td>\n<\/tr>\n | |||||||||||||||
| Switching Freq<\/td>\n | 500 kHz to 1.5 MHz<\/td>\n<\/tr>\n | |||||||||||||||
| RDS(on) HS<\/td>\n | 3.5 mOhm typical<\/td>\n<\/tr>\n | |||||||||||||||
| RDS(on) LS<\/td>\n | 2.3 mOhm typical<\/td>\n<\/tr>\n<\/table>\nCaracter\u00edsticas<\/h2>\nAplicaciones<\/h2>\nProduct Overview The TPS549D22RVFT is a Texas Instruments 40V, 40A synchronous step-down converter with integrated MOSFETs. It features D-CAP3 control mode, 500 kHz to 1.5 MHz programmable switching frequency, adaptive on-time, and comprehensive protection. Packaged in a thermally-enhanced VQFN-HR package rated for -40C to +125C. Key Specifications Input Voltage 4.5 V to 40 V Output […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[31,13],"tags":[],"chip_brand":[138],"class_list":["post-8751","post","type-post","status-publish","format-standard","hentry","category-dc-dc-converters","category-integrated-circuits-ics","chip_brand-ti"],"acf":{"brief_explanation":"40V 40A sync buck, D-CAP3, 3.5\/2.3mOhm MOSFETs, PMBus, VQFN-HR","date_code":"","package_case":"VQFN-HR (7.0 x 5.0 x 0.9 mm with exposed pad)","in_stock":2100,"datasheet":"https:\/\/www.ti.com\/lit\/ds\/symlink\/tps549d22.pdf","price":"$4.20 @ 1ku","product_introduction":"The TPS549D22RVFT is a Texas Instruments high-current synchronous step-down converter delivering up to 40A from 4.5V to 40V input. The integrated 3.5 mOhm high-side and 2.3 mOhm low-side MOSFETs minimize conduction losses for high efficiency at heavy loads. D-CAP3 control mode provides fast transient response with no external compensation required. The switching frequency is programmable from 500 kHz to 1.5 MHz via PMBus\/I2C, allowing optimization of efficiency vs. solution size. The digital interface enables real-time monitoring of output voltage, current, and temperature, plus fault logging. Protection includes overcurrent, overvoltage, undervoltage, and thermal shutdown with auto-retry. The VQFN-HR package provides excellent thermal performance for 40A output.","working_principle":"The TPS549D22 uses D-CAP3 (Direct Control with Adaptive On-Time and 3rd Generation Emulated Ripple) control. An internal emulator generates a ripple signal that emulates the inductor current ripple, adding it to the output voltage feedback. This allows D-CAP3 to achieve stable operation with low-ESR ceramic output capacitors. The adaptive on-time adjusts the high-side MOSFET on-time based on input\/output voltage ratio to maintain constant switching frequency across the operating range. At light loads, the device enters skip mode (pulse-frequency modulation) for high efficiency. The PMBus\/I2C interface provides digital control of voltage margining, frequency, and fault thresholds, plus telemetry readback of output voltage, current, and die temperature.","pin_description":" VQFN-HR with key pins: VIN (input supply), SW (switch node), BOOT (bootstrap), VDD (5V bias), EN (enable), FB (feedback), PG (power-good), SCL\/SDA (PMBus\/I2C), SYNC (frequency sync), AGND\/PGND (grounds), and thermal pad. Refer to datasheet for complete VQFN-HR pin mapping.<\/p>","application_scenarios":"
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