User's Guide SLVU953
October 2013
This user's guide contains information for the TPS65581 as well as support documentation for the TPS65581EVM-575 evaluation module. Included are the performance specifications, board layouts, schematic, and the bill of materials of the TPS65581EVM-575.
The TPS65581 is a triple output, advanced D-CAP2TM-mode, synchronous buck converter requiring a very low external component count. The advanced D-CAP2 control circuit is optimized for low-ESR output capacitors such as POSCAP, SP-CAP, or ceramic types and features fast transient response with no external compensation. The switching frequency is internally set at a nominal 700 kHz. The high-side and low-side switching MOSFETs are incorporated inside the TPS65580 package along with the gate-drive circuitry. The low drain-to-source on resistance of the MOSFETs allows the TPS65580 to achieve high efficiencies and helps keep the junction temperature low at high output currents. The TPS65580 dc/dc synchronous converter is designed to provide up to 1.5-A, 2.5-A and 1.5-A output for each of 3 channels from an input voltage source of 4.5 V to 18 V. The output voltage range is from 0.76 V to 6.5 V.
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