1 Introduction
The TPS54386EVM evaluation module (EVM) is a dual non-synchronous buck converter providing fixed 5.0-V
and 3.3-V output at up to 2 A each from a 12-V input bus. The EVM is designed to start up from a single supply,
so no additional bias voltage is required for start-up. The module uses the TPS54386 Dual Non-Synchronous
Buck Converter with Integral High-Side FET.
1.1 Description
TPS54386EVM is designed to use a regulated 12-V (+10% / -20%) bus to produce two regulated power rails, 5.0
V and 3.3 V at up to 2 A of load current each. TPS54386EVM is designed to demonstrate the TPS54386 in a
typical 12-V bus system while providing a number of test points to evaluate the performance of the TPS54386
in a given application. The EVM can be modified to other input or output voltages by changing some of the
components.
1.2 Applications
• Non-Isolated Low Current Point of Load and Voltage Bus Converters
• Consumer Electronics
• LCD TV
• Computer Peripherals
• Digital Set Top Box
1.3 Features
• 12-V (+10% / -20%) Input Range
• 5.0-V and 3.3-V Fixed Output Voltage, Adjustable with Resistor Change
• 2-A
DC
Steady State Output Current (3 A Peak)
• 600-kHz Switching Frequency (fixed by TPS54386)
• Internal Switching MOSFET and External Rectifier Diode
• Double Sided 2 Active Layer PCB (all components on top side, test point signals routed on internal layers)
• Active Converter Area Less than 1.8 Square Inches (0.89” x 1.97”)
• Convenient Test Points (used for probing switching waveforms and non-invasive loop response testing)
Introduction
2
TPS54x86 Step-Down Converter Evaluation Module User's Guide
SLUU286A – MARCH 2008 – REVISED OCTOBER 2021
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