UCD9090A 10-Rail Power Supply Sequencer and Monitor With ACPI Support

1 Features

Monitor and sequence 10 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 26 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
Response and monitor to GPI-triggered fault
Easily cascade multiple power sequencers and take coordinated fault responses
Pin-selected rail states
Cascading multiple devices
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