TPS54218RTER

ACTIVE

Features for the TPS54218

• Two, 30-mΩ (typical) MOSFETs for high-efficiency at 2-A loads

• Switching frequency: 200 kHz to 2 MHz

• Voltage reference over temperature: 0.8 V ±1%

• Synchronizes to external clock

• Adjustable soft start/sequencing

• UV and OV power-good output

• Low operating and shutdown quiescent current

• Safe start-up into prebiased output

• Cycle-by-cycle current limit, thermal and frequency foldback protection

• Operating junction temperature range: –40°C to 150°C

• Thermally-enhanced 3-mm × 3-mm 16-pin WQFN package

• Create a custom design using the TPS54218 with the WEBENCH® Power Designer

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Description for the TPS54218

TheTPS54218 device is a full-featured, 6-V, 2-A, synchronous, step-down current-mode converter with two integrated MOSFETs.

The TPS54218 device enables small designs by integrating the MOSFETs,implementing current mode control to reduce external component count, reducing inductor size byenabling up to 2-MHz switching frequency, and minimizing the device footprint with a small, 3-mm × 3-mm,thermally-enhanced QFN package.

The TPS54218 device provides accurate regulation for a variety ofloads with an accurate ±1% voltage reference (VREF) over temperature.

Efficiency is maximized through the integrated 30-mΩ MOSFETs and a 350-µA typical supplycurrent. Using the EN pin, shutdown supply current is reduced to 2 µA by entering a shutdownmode.

Undervoltage lockout is internally set at 2.6 V, but can be increased by programming thethreshold with a resistor network on the enable pin. The output voltage startup ramp is controlledby the soft-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 protects the device during anovercurrent condition.