Typical Size 6,4 mm X 9,7 mm
TPS54073
www. ti. com . . . SLVS547 – FEBRUARY 2005
2. 2 – 4 -V, 14-A SYNCHRONOUS BUCK CONVERTER WITH DISABLED SINKING DURING START-UP
FEATURES
1
•2 8-mΩ MOSFET Switches for High Efficiency at 14. 5-A Peak Output Current
• Separate Low-Voltage Power Bus • Disabled Current Sinking During Start-Up • Adjustable Output Voltage Down to 0. 9 V • Wide PWM Frequency: Fixed 350 kHz, 550 kHz
or Adjustable 280 kHz to 700 kHz
• Synchronizable to 700 kHz • Load Protected by Peak Current Limit and
Thermal Shutdown
• Integrated Solution Reduces Board Area and Total Cost
APPLICATIONS
• Low-Voltage, High-Density Distributed Power Systems
• Point of Load Regulation for HighPerformance DSPs, FPGAs, ASICs, and Microprocessors
• Broadband, Networking, and Optical Communications Infrastructure
• Power PC Series Processors
TYPICAL APPLICATION
*
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Voltage Input 1
Voltage Input 2
PVIN
PH
TPS54073
BOOT
VIN
PGND
VBIAS VSENSE
AGND COMP
DESCRIPTION
As a member of the SWIFT™family of dc/dc regulators, the TPS54073 low-input voltage high-output current synchronous buck PWM converter integrates all required active components. Included on the substrate with the listed features are a true, high performance, voltage error amplifier that enables maximum performance and flexibility in choosing the output filter L and C components; an undervoltage-lockout circuit to prevent start-up until the input voltage reaches 3 V; an internally or externally set slow-start circuit to limit in-rush currents; and a power good output useful for processor/logic reset, fault signaling, and supply sequencing.
For reliable power up in output precharge applications, the TPS54073 is designed to only source current during start-up.
The TPS54073 is available in a thermally enhanced 28-pin TSSOP (PWP) Po...
TPS54073 PDF File
