The UCD9080 power-supply sequencer controls the enable sequence of up to eight independent voltage rails and provides four general-purpose digital outputs. The device operates from a 3.3-V supply, provides 3.2-mV resolution of voltage rails, and requires no external memory or clock. The UCD9080 monitors the voltage rails independently at more than a 20-kHz rate and has a high degree of rail sequence and rail error-response configurability. The sequencing of rails can be based on timed events or on timed events in conjunction with other rails achieving regulation or a voltage threshold. In addition, each rail is monitored for undervoltage and overvoltage glitches and thresholds. Each rail the UCD9080 monitors can be configured to shut down a user-defined set of other rails, and alarm conditions are monitored on a per-rail basis.

Figure 1 shows the UCD9080 power-supply sequencer in a typical application.

• Single Supply Voltage: 3.3 V
• Low Power Consumption
• Sequences and Monitors up to Eight Voltage Rails
• Rail Voltages Sampled Every 50 μs With 3.2-mV Resolution
• Four Configurable Digital Outputs for Power-On Reset and Other Functions
• Configurable Rail-Enable Output Polarity
• Flexible Rail Sequencing: Timeline (ms), Parent Rail Regulation Window, Parent Rail Achieving Defined Threshold
• Under- and Overvoltage Thresholds: Settable Per-Rail
• Regulation Expiration Time: Settable Per-Rail
• Flexible Rail Shutdown: Parent Rail Shutdown Can Shut Down Child Rails, Independent Rail Configuration
• Per-Rail Alarm Conditions, With Timestamp: Under- and Overvoltage Glitch, Sustained Under- and/or Overvoltage, Rail Did Not Start
• I2C Interface for Configuration and Monitoring
• Microsoft? Windows? GUI for Configuration and Monitoring
• APPLICATIONS
  • Telecommunications Switches
  • Servers
  • Networking Equipment
  • Test Equipment
  • Any System Requiring Sequencing of Multiple Voltage Rails

TMS320 is a trademark of Texas Instruments. Microsoft, Windows are trademarks of Microsoft Corporation. All other trademarks are the property of their respective owners.

• Supply voltage (Min) (V)
• 3
• Number of supplies monitored
• 8
• Supply voltage (Max) (V)
• 3.6
• Iq (Typ) (uA)
• 4500
• Time delay (ms)
• Programmable
• Number of sequenced outputs
• 8
• Rating
• Catalog

UCD9080的完整型号有：UCD9080RHBR、UCD9080RHBT，以下是这些产品的关键参数及官网采购报价：

UCD9080RHBR，工作温度：-40 to 85，封装：VQFN (RHB)-32，包装数量MPQ：3000个，MSL 等级/回流焊峰值温度：Level-2-260C-1 YEAR，引脚镀层/焊球材料：NIPDAU，TI官网UCD9080RHBR的批量USD价格：3.115（1000+）

UCD9080RHBT，工作温度：-40 to 85，封装：VQFN (RHB)-32，包装数量MPQ：250个，MSL 等级/回流焊峰值温度：Level-2-260C-1 YEAR，引脚镀层/焊球材料：NIPDAU，TI官网UCD9080RHBT的批量USD价格：3.634（1000+）

UCD9081EVM — UCD9081EVM 评估模块

UCD9081EVM 简化了 UCD9081 电源序列发生器和监控器的评估过程。UCD9081EVM 允许用户通过板载接头对 8 个板载电源或外部电源的定序和监控进行配置。

USB-TO-GPIO — USB Interface Adapter EVM

该 EVM 用作主机 PC（兼容 IBM™）与一个或多个从属器件（通过标准 A 型转迷你 B 型 USB 电缆实现）之间的接口适配器或桥接器。USB 接口适配器与主机 PC 之间的通信通过 USB 实现，而 USB 接口适配器与从属器件之间的通信通过内部集成电路 (I²C)、SMBus、PMBus 和/或通用输入/输出 GPIO 实现。桥接器转换 USB 与串行协议之间的通信事务。

UCD9080 EVM GUI-2.3 (Rev. A)

PSpice for TI 可提供帮助评估模拟电路功能的设计和仿真环境。此功能齐全的设计和仿真套件使用 Cadence 的模拟分析引擎。PSpice for TI 可免费使用，包括业内超大的模型库之一，涵盖我们的模拟和电源产品系列以及精选的模拟行为模型。

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