Texas Instruments TPS54218

Description

The TPS54218 device is a full featured 6 V, 2 A, synchronous step down current mode converter with two integrated MOSFETs.The TPS54218 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 3mm x 3mm thermally enhanced QFN package.The TPS54218 provides accurate regulation for a variety of loads with an accurate ±1% Voltage Reference (Vref) over temperature.Efficiency is maximized through the integrated 30mΩ MOSFETs and 350μA typical supply current. Using the enable pin, shutdown supply current is reduced to 2 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 fold back and thermal shutdown protects the device during an overcurrent condition.The TPS54218 is supported in the SwitcherProTM Software Tool at www.ti.com/switcherpro.For more SWIFTTM documentation, see the TI website at www.ti.com/swift.

Features

• Two 30 mΩ (typical) MOSFETs for High Efficiency at 2 A loads
• 200kHz to 2MHz Switching Frequency
• 0.8 V ± 1% Voltage Reference Over Temperature
• Synchronizes to External Clock
• Adjustable Slow Start/Sequencing
• UV and OV Power Good Output
• Low Operating and Shutdown Quiescent Current
• Safe Start-up into Pre-Biased Output
• Cycle by Cycle Current Limit, Thermal and Frequency Fold Back Protection
• –40°C to 150°C Operating Junction Temperature Range
• Thermally Enhanced 3mm × 3mm 16-pin QFN

Typical applications

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

More information

• Datasheet
• IC product information