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TPS54810-TPS54810PWP-TPS54810PWPR-TPS54810PWPRG4
5V Input 8A Continuous Buck Converter with Adjustable Output Voltage
TPS54810
SLVS420B − MARCH 2002 − R EVISED FEBRUARY 2005
4-V TO 6-V INPUT, 8-A OUTPUT SYNCHRONOUS BUCK PWM
SWITCHER WITH INTEGRATED FETS (SWIFT™)
6,4 mm X 9,7 mm
FEATURES 30-mΩ MOSFET Switches for High Efficiencyat 8-A Continuous Output 0.9-V to 3.3-V Adjustable Output VoltageRange With 1% Accuracy Externally Compensated Fast Transient Response Wide PWM Frequency: Fixed 350 kHz, 550 kHz or Adjustable 280 kHz to 700 kHz Load Protected by Peak Current Limit andThermal Shutdown Integrated Solution Reduces Board Area andTotal Cost
APPLICATIONS Low-Voltage, High-Density Systems WithPower Distributed at 5 V Point of Load Regulation for High Performance DSPs, FPGAs, ASICs andMicroprocessors Broadband, Networking, and OpticalCommunications Infrastructure Portable Computing/Notebook PCs
DESCRIPTIONAs a member of the SWIFT™ family of dc/dc regulators,the TPS54810 low-input voltage high-output currentsynchronous buck PWM converter integrates allrequired active components. Included on the substratewith the listed features are a true, high performance,voltage error amplifier that enables maximumperformance under transient conditions and flexibility inchoosing the output filter L and C components; anunder-voltage-lockout circuit to prevent start-up untilthe input voltage reaches 3.8 V; an internally orexternally set slow-start circuit to limit in-rush currents;and a power good output useful for processor/logicreset, fault signaling, and supply sequencing.
The TPS54810 is available in a thermally enhanced28-pin TSSOP (PWP) PowerPAD™ package, whicheliminates bulky heatsinks. TI provides evaluationmodules and the SWIFT™ designer software tool to aidin quickly achieving high-performance power supplydesigns to meet aggressive equipment developmentcycles.
Input
SIMPLIFIED SCHEMATIC
IL − Load Current − A
Efficiency
EFFICIENCY AT 700 HZ100 2345678910
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