UCD90120A 12-Rail Power Supply Sequencer and Monitor With ACPI Support

1 Features

Monitor and Sequence 12 Voltage Rails
- All Rails Sampled Every 400 μs
- 12-bit ADC With 2.5-V, 0.5% Internal V_REF
- 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 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