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UCD9090 Datasheet

Part NameDescriptionManufacturer
UCD9090 10-Rail Power Supply Sequencer and Monitor With ACPI Support TI
Texas Instruments TI
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UCD9090 image

Description
The UCD9090 is a 10-rail PMBus/I2C addressable power-supply sequencer and monitor. The device integrates a 12-bit ADC for monitoring up to 10 power-supply voltage inputs. Twenty-three GPIO pins can be used for power supply enables, power-on reset signals, external interrupts, cascading, or other system functions. Ten of these pins offer PWM functionality. Using these pins, the UCD9090 offers support for margining, and general-purpose PWM functions.

Features
• Monitor and Sequence 10 Voltage Rails
    – All Rails Sampled Every 400 μs
    – 12-bit ADC with 2.5-V, 0.5% Internal VREF
    – Sequence Based on Time, Rail and Pin Dependencies
    – Four Programmable Undervoltage and Overvoltage Thresholds per Monitor
• Nonvolatile Error and Peak-Value Logging per Monitor (up to 30 Fault Detail Entries)
• Closed-Loop Margining for 10 Rails
    – Margin Output Adjusts Rail Voltage to Match User-Defined Margin Thresholds
• Programmable Watchdog Timer and System Reset
• Flexible Digital I/O Configuration
• Pin-Selected Rail States
• Cascading Multiple Devices
• Multi-phase PWM Clock Generator
    – Clock Frequencies From 15.259 kHz to 125 MHz
    – Capability to Configure Independent Clock Outputs for Synchronizing Switch-Mode Power Supplies
• JTAG and I2C/SMBus/PMBus™ Interfaces

Applications
• Industrial / ATE
• Telecommunications and Networking Equipment
• Servers and Storage Systems
• Any System Requiring Sequencing and Monitoring of Multiple Power Rails

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