UCD90240 24-Rail PMBus Power Sequencer and Power Manager | TI.com

UCD90240 (LIFEBUY) 24-Rail PMBus Power Sequencer and Power Manager


This product is being discontinued. Orders for life buy purchases are available

Replaced By UCD90320 – The device has SIMILAR FUNCTIONALITY but is not functionally equivalent to the compared device.

TI does not recommend using this part in a new design. This product continues to be in production to support existing customers.


The UCD90240 is a 24-rail PMBus addressable power sequencer and system manager in a compact 9-mm × 9-mm BGA package.

The device provides 24 analog monitor (MON) pins to monitor power-supply voltage, current, or temperature with two 12-bit ADC engines, 24 dedicated enable (EN) pins to control power rail on/off, 24 dedicated margin pins for closed-loop margining, 12 Logic GPO (LGPO) pins to support flexible Boolean logic and state machine functions, and 24 GPIO pins which can be configured as GPI, GPO, System Reset, cascading fault pins, and Watchdog I/O, and so forth.

The 24 EN pins and the 12 LGPO pins can be configured to be active driven or open-drain outputs.

Nonvolatile Event Logging preserves fault events after power dropout. Black Box Fault Log feature and preserves the status of all rails and I/O pins when the first fault occurs.

The cascading feature offers convenient ways to manage up to 96 voltage rails through one SYNC_CLK pin connection. The Fault Pin feature coordinates among cascaded devices to take synchronized fault responses.

The Pin-Selected Rail States feature uses up to three GPIs to control up to eight user-defined power states. These states can implement system low-power modes as outlined in the Advanced Configuration and Power Interface (ACPI) specification.

The TI Fusion Digital Power™ designer software is an intuitive PC-based graphical user interface (GUI) that can configure, store, and monitor all system operating parameters.


  • Sequence, Monitor and Margin 24 Voltage Rails
    with a 9-mm × 9-mm Small Footprint
  • Monitor and Respond to User-Defined Faults
    Including OV, UV, OC, UC, Temperature, Time-
    out, and GPI-Triggered Faults
  • Flexible Sequence-on/off Dependencies, Delay
    Time, Boolean Logic, and GPIO Configuration to
    SupportComplex Sequencing Applications
  • 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
  • Easy-to-Use Fusion GUIs Eliminate Coding Efforts
    • Online and Offline System Level Design
    • Online Monitoring and Debugging
    • Manufacturing GUI Optimized for
  • Programmable Watchdog Timer and System
  • Pin-Selected Rail State
  • PMBus 1.2 Compliant


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Part number Order Number of supplies monitored VCC (Min) (V) VCC (Max) (V) Iq (Typ) (uA) Time delay (ms) Number of sequenced outputs Rating Package Group Package size: mm2:W x L (PKG)
UCD90120A Order now 13     3     3.6     50000     Programmable     12     Catalog     VQFN | 64     64VQFN: 81 mm2: 9 x 9 (VQFN | 64)    
UCD90124A Order now 12     3     3.6     50000     Programmable     12     Catalog     VQFN | 64     64VQFN: 81 mm2: 9 x 9 (VQFN | 64)    
UCD90160A Order now 16     3     3.6     50000     Programmable     16     Catalog     VQFN | 64     64VQFN: 81 mm2: 9 x 9 (VQFN | 64)    
UCD90320 Order now 32     3.15     3.63     31400     Programmable     32     Catalog     NFBGA | 169     169NFBGA: 144 mm2: 12 x 12 (NFBGA | 169)    
UCD9090A Order now 10     3     3.6     50000     Programmable     10     Catalog     VQFN | 48     48VQFN: 49 mm2: 7 x 7 (VQFN | 48)