UCD90120A - Texas Instruments

UCD90120A 12-Rail Power-Supply Sequencer/Monitor

The UCD90120A is a 12-rail PMBus/I2C addressable power-supply sequencer and monitor. The device integrates a 12-bit ADC for monitoring up to 12 power-supply voltage inputs. Twenty-six GPIO pins can be used for power supply enables, power-on reset signals, external interrupts, cascading, or other system functions. Twelve of these pins offer PWM functionality..

Features

•1 Monitor and Sequence 12 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 12 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
• Multiphase PWM Clock Generator
  – Clock Frequ.