High Power Density 12Vin, 100W Synchronous DC/DC Step-Down Buck Converter with Inductor-On-Top
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The TPS53355 Inductor-On-Top step-down buck converter design enables high power density through reduction of X-Y PCB area by placing the output inductor on top of the IC and results in 92% minimum efficiency for 66W and 100W output power designs (3.3V and 5V output)  requiring only 4x100µF ceramic output caps.

  • 94% Efficiency at 12VIN, 5Vout,20A output current, 650KHz
  • 6W power loss at 100W Output Power
  • 14mV Output Voltage Ripple at 20A output current
  • Only 4x100µF output ceramic capacitors
  • 27mV Output Voltage Overrshoot in response to 5A to a 10A load increase, 2.5A/µs
  • 58.7°C IC case temperature at 5Vout and 20A output current (100W Output Power)

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(Output Voltage 1)
(Output Voltage 2)
Vin (Min) (V)10.810.8
Vin (Max) (V)13.213.2
Vout (Nom) (V)53.3
Iout (Max) (A)2020
Output Power (W)10066
Input TypeDCDC
TopologyBuck- Integrated SwitchBuck- Integrated Switch

TI Devices (1)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
TPS53355  High-efficiency 1.5-V to 15-V, 30-A synchronous SWIFT™ buck converter with eco-mode  Step-down (buck) regulators  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
TPS53355 Download Download

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Technical documentation

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User guide (3)
Title Type Size (KB) Date
PDF 101 15 Apr 2015
PDF 1893 15 Apr 2015
PDF 1952 15 Apr 2015
Design files (4)
Title Type Size (KB) Date
ZIP 256 15 Apr 2015
PDF 113 15 Apr 2015
PDF 1434 15 Apr 2015
PDF 1878 15 Apr 2015

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