Texas Instruments UCD90240EVM-704, User Manual, Page: 2 / 38

Introduction
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12 UCD90240EVM-704 Midlayer 4
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13 UCD90240EVM-704 Bottom Layer
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14 UCD90240EVM-704 Bottom Solder Mask
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15 UCD90240EVM-704 Bottom Overlay
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16 UCD90240EVM-704 Drill Drawing
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17 UCD90240EVM-704 Board Dimensions
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18 UCD90240EVM Schematic (1 of 6)
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19 UCD90240EVM Schematic (2 of 6)
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20 UCD90240EVM Schematic (3 of 6)
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21 UCD90240EVM Schematic (4 of 6)
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22 UCD90240EVM Schematic (5 of 6)
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23 UCD90240EVM Schematic (6 of 6)
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List of Tables
1 UCD90240EVM-704 Electrical Performance Specifications
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2 Connector Definition
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3 Test Point Functions
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4 UCD90240EVM-704 Bill of Materials
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1 Introduction
This user’s guide describes the UCD90240 Sequencer Development Board (UCD90240EVM-704). The
UCD90240 is a 24-rail PMBus power sequencer and system manager. The UCD90240 can sequence,
monitor and margin 24 voltage rails, monitor and respond to user-defined faults such as OV, UV, OC, UC,
temperature, time-out, and GPI-triggered faults; provide flexible configurations such as sequence-on/off
dependencies, delay time, and Boolean logic; store fault logs into nonvolatile memory; and integrate
value-added features such as watchdog, system reset, cascading and sync clock.
2 Description
The UCD90240EVM-704 contains a UCD90240 sequencer device and a step-down power stage using the
TPS54678 synchronous step-down switcher with integrated FET (SWIFT™). Access to all of the I/O pins
is provided via strip connectors for integration into complex systems using clip-type jumper wires. The
UCD90240EVM provides a PMBus (power management bus) communication port. Microsoft
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Windows
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based host computers can monitor, control and configure the UCD90240 device using a USB interface
adapter EVM (HPA172) and TI fusion digital power designer graphical user interface (GUI). The power
stage using the TPS54678 synchronous step-down switcher (5-V input, 1.2-V output) is provided to assist
evaluation of the UCD90240’s margining function.
2.1 Typical Applications
• Industrial / ATE
• Telecom / Networking equipment
• Servers and storage systems
• Any system requiring sequencing and monitoring of multiple power rails
2.2 Features
• Powered by single 5-V supply
• Status LEDs on all digital I/O pins
• Strip connector I/O access
• Headers with pullup/pulldown configurability
• PMBus interface for configuration and monitoring
2 UCD90240EVM-704 24-Rail Sequencer Development Board SLVUAF3A – March 2015 – Revised March 2015
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