TPS54618RTER

The TPS54618 device is a full-featured 6-V, 6-A, synchronous step-down current-mode converter with two integrated MOSFETs. The TPS54618 enables small designs by integrating the MOSFETs, implementing current-mode control to reduce external component count, reducing inductor size by enabling up to 2-MHz switching frequency, and minimizing the IC footprint with a small 3-mm × 3-mm thermally enhanced WQFN package. The TPS54618 provides accurate regulation for a variety of loads with an accurate ±1% voltage reference (VREF) over temperature. Efficiency is maximized through the integrated 12-mΩ MOSFETs and 515-μA typical supply current. Using the enable pin, shutdown supply current is reduced to 5.5-μA by entering a shutdown mode. Undervoltage lockout is internally set at 2.6 V, but can be increased by programming the threshold with a resistor network on the enable pin. The output voltage startup ramp is controlled by the slow-start pin. An open-drain power-good signal indicates the output is within 93% to 107% of its nominal voltage. Frequency foldback and thermal shutdown protect the device during an overcurrent condition.

Applications

• Low-Voltage, High-Density Power Systems
• Point-of-Load Regulation for High-Performance DSPs, FPGAs, ASICs, and Microprocessors
• Broadband, Networking, and Optical Communications Infrastructure

Key features

• Two 12-mΩ (Typical) MOSFETs for High Efficiency at 6-A Loads
• 300-kHz to 2-MHz Switching Frequency
• 0.8-V ±1% Voltage Reference Over Temperature (-40°C to 150°C)
• Synchronizes to External Clock
• Adjustable Slow-Start and Sequencing
• UV and OV Power-Good Output
• -40°C to 150°C Operating Junction Temperature Range
• Thermally Enhanced 3-mm × 3-mm 16-pin WQFN
• Pin-Compatible to TPS54418