TPS54318

2.95V 至 6V 输入、3A 同步降压 SWIFT™ 转换器

The device is a full featured 6-V, 3-A, synchronous, step-down, current mode converter with two integrated MOSFETs.

The TPS54318 device 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 device footprint with a small, 3 mm x 3 mm, thermally enhanced, QFN package.

The TPS54318 device provides accurate regulation for a variety of loads with an accurate ±1% voltage reference VREF over temperature.

Efficiency is maximized through the integrated 30-mΩ MOSFETs and a 350-μA 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 soft-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.

Use SwitcherPro power supply design software to create, manage and share custom power supply designs for the TPS54318 by clicking here.

For more SWIFT documentation, see the website at www.ti.com/swift.

For all available packages, see the orderable addendum at the end of the datasheet.

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Two, 30-mΩ typical MOSFETs for High-Efficiency at 3-A loads

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Switching Frequency: 200 kHz to 2 MHz

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Voltage Reference Over Temperature: 0.8 V ± 1%

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Synchronizes to External Clock

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Adjustable Soft-start/Sequencing

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UV and OV Power Good Output

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Low Operating and Shutdown Quiescent Current

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Safe Start-up into Pre-Biased Output

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Cycle-by-Cycle Current Limit, Thermal and Frequency Fold Back Protection

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Operating Junction Temperature Range: –40°C to 150°C

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Thermally Enhanced 3 mm × 3 mm 16-pin WQFN Package