Datasheet

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1 Introduction
1.1 Description
1.2 Applications
1.3 Features
Introduction
The TPS40040EVM-001 evaluation module (EVM) is a synchronous buck converter providing a fixed
1.8-V output at up to 10 A from a 5-V input bus. The EVM is designed to start up from a single supply, so
no additional bias voltage is required for startup. The module uses the TPS40040 reduced pin count,
low-voltage, synchronous buck controller.
TPS40040EVM-001 is designed to use a regulated 5-V (4.5 V to 5.5 V) bus to produce a regulated 1.8-V
output at up to 10 A of load current. The TPS40040EVM-001 is designed to demonstrate the TPS40040 in
a typical 5-V bus to low-voltage application while providing a number of test points to evaluate the
performance of the TPS40040 in a given application. The EVM can be modified to support output voltages
from 0.9 V to 3.3 V by changing a single set resistor.
• Non-isolated medium current point of load and low-voltage bus converters.
• Networking equipment
• Telecommunications equipment
• Computer peripherals
• Digital set top box
• 4.5-V to 5.5-V input range
• 1.8-V fixed output, adjustable with single resistor
• 10-Adc steady-state output current
• 300-kHz switching frequency (fixed by TPS40040)
• Single main switch MOSFET for both main switch and synchronous rectifier
• Double-sided 2 active layer PCB with all components on top side
• Active converter area of less than 1.5 in.
2
(i.e., <1.4 in. × 1.0 in.)
• Convenient test points for probing switching waveforms and noninvasive loop response testing
Using the TPS40040EVM-001: A 12-V Input, 1.8-V Output, 10-A Synchronous Buck Converter2 SLUU266 – January 2007
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