Smallest 12-A Synchronous-Buck Regulator with PMBus claimed by TI
Texas Instruments, Inc. (TI) today introduced what is claimed to be the industry's smallest 12-A, synchronous dc-dc buck converter with PMBus interface. The SWIFT TPS53915 converter features a PowerStack™ QFN package and integrated NexFET™ MOSFETS to drive ASICs in space-constrained and power-dense applications in a variety of markets, including wired and wireless communications, enterprise/cloud computing and storage systems. Used in conjunction with TI's WEBENCH online design tools, the TPS53915 simplifies power conversion and speeds the design process.
The highly-integrated converter features 0.5 percent reference voltage accuracy to meet voltage requirements of deep sub-micron processors. D-CAP3â„¢ adaptive on-time control mode is easy to use, provides very fast load transient response and reduces external component count. Programmability and fault reporting via PMBus simplifies power supply design and further reduces component count.
TPS53915 key features and benefits include: Integrated high- and low-side MOSFETs support 12-A continuous output current. On-chip PMBus interface simplifies power supply design. D-CAP3 adaptive on-time control mode eliminates output capacitors and requires no loop compensation, which minimizes the external component count. Auto-skipping Eco-modeâ„¢ provides high light-load efficiency. 28-pin, 3.5-mm by 4.5-mm by 1-mm PowerStack QFN package features TI's NexFET power MOSFETs stacked on a grounded lead frame and connected using copper clips. The unique combination of stacking and bonding allows for a smaller, more integrated quad flat no-lead (QFN) package compared to other solutions that place MOSFETs side by side.
Other features include no external compensation, internal soft start, input under-voltage protection, internal bootstrap capacitor and thermal shutdown. The TPS53915 dc-dc converter is available in volume now from TI and its authorized distributors and is priced at US$3.51 in 1,000-unit quantities.
