UCD90124A - Texas Instruments

UCD90124A 12-Rail Power-Supply Sequencer/Monitor

The UCD90124A 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.