TPS53318DQPR

• Synchronous Buck with Integrated switches, 8A Output Current
• Input Range of 1.5V to 22V, Adjustable Output 600mV to 5.5V
• Switching Frequency of 1M Hz, Efficiency Listed at 91%
• Eco-Mode Light-Load operation, 420uA Nominal Supply Current
• 22-Pin LSON, 6mm X 5mm, 1.5mm Height
• Ambient Rating of -40C to 85C, 125C Maximum Junction Temperature

The Texas Instruments TPS53318DQPR is a synchronous buck converter with an integrated high-side and low-side switch and an eco-mode light-load scheme, rated at 8A output current in a 22-pin LSON package measuring 6mm x 5mm. It accepts a 1.5V to 22V input and produces an adjustable output from 600mV to 5.5V, switching at 1M Hz with 91% efficiency and a nominal 420uA supply current. TI ships the TPS53318DQPR on tape and reel at 2500 pieces per reel, MSL 2, RoHS compliant, Active and in Production, with REACH SVHC declared Yes and the Lead Free attribute reading Contains Lead. Two record notes: the product name states -40 to 125 while the ambient and Max Operating Temperature attributes read 85C with a 125C maximum junction temperature, and Max Supply Voltage reads 28V against a 22V Max Input Voltage.

An 8A integrated-switch buck at this input range is a point-of-load regulator for digital systems: generating core, DDR, I/O and SoC rails from a 12V intermediate bus in servers, storage, networking line cards, set-top boxes and industrial computing. Integrating both switches removes the external MOSFET selection and layout work a controller would require, which shortens design time and shrinks the switching loop. The 1M Hz frequency keeps the output inductor small at the cost of switching loss, and eco-mode raises light-load efficiency so idle power stays acceptable when the processor is not busy. Buyers are computing, networking and industrial-equipment OEMs and their contract manufacturers. Because the ambient rating is 85C rather than the 125C implied by the product name, validate the thermal design at full current in the target enclosure before committing.