Walton Electronics Co., Ltd.
Shenzhen Walton Electronics Co., Ltd.
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| FEATURES |
| • Two 30 mΩ (typical) MOSFETs for high efficiency at 5-A loads • 200kHz to 2MHz Switching Frequency • 0.6 V Voltage Reference With ± 1% Initial Accuracy • 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 140°C Operating Junction Temperature Range • Thermally Enhanced 3mm × 3mm 16-pin QFN |
| 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 |
| DESCRIPTION |
| The TPS54519 device is a full featured 6 V, 5 A, synchronous step down current mode converter with two integrated MOSFETs. |
| The TPS54519 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. |
| 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. |
| Under voltage 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. |