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Texas Instruments UCD90320U Power Sequencer & System Manager

Texas Instruments UCD90320U Power Sequencer and System Manager is a 32-rail PMBus™ addressable power sequencer and system manager in a compact 0.8mm pitch BGA package. ULA mold compound is adapted to reduce the soft errors caused by alpha particles. The device scans the user configuration SRAM to detect a single event upset (SEU). Both features provide higher reliability for the applications.

The 24 integrated ADC channels (AMONx) monitor the power supply voltage, current, and temperature. Of the 84 GPIO pins, 8 can be used as digital monitors (DMONx), 32 to enable the power supply (ENx), 24 for margining (MARx), 16 for logical GPO, and 32 GPIs for cascading and system function. The 32 ENx and 16 LGPOx pins can be configured to be actively driven or open drain outputs.

Nonvolatile event logging preserves fault events after power dropout. Black box fault log feature preserves the status for all rails and I/O pins when the first fault occurs. The cascading feature offers convenient ways to manage up to 128 voltage rails through one SYNC_CLK pin connection.

Features

  • Ultra Low Alpha (ULA) mold compound to reduce soft errors caused by alpha particles
  • Single Event Upset (SEU) detection
  • Sequence, monitor, and margin 24 voltage rails plus 8 digital rails
  • Monitor and respond to OV, UV, OC, UC, temperature, time-out, and GPI-triggered faults
  • Flexible sequence-on and off dependencies, delay time, boolean logic, and GPIO configuration to support complex sequencing applications
  • Four rail profiles for Adaptive Voltage Identification (AVID) voltage regulator
  • High-accuracy closed-loop margining
  • Active trim function improves rail output voltage accuracy
  • Advanced nonvolatile event logging to assist system debugging
    • Single-event fault log (100 entries)
    • Peak value log
    • Black box fault log to save status of all rails and I/O pins at the first fault
  • Easily cascade up to 4 power sequencers and take coordinated fault responses
  • Programmable watchdog timer and system reset

Applications

  • Industrial and ATE
  • Telecom and networking equipment
  • Servers and storage systems
  • Systems requiring sequencing and monitoring of multiple power rails

Functional Block Diagram

Block Diagram - Texas Instruments UCD90320U Power Sequencer & System Manager
Published: 2018-10-12 | Updated: 2023-07-07