TI UCD90160ARGCR

The UCD90160A is a 16-rail PMBus/I²C addressable power sequencer and monitor. This device integrates a 12-bit ADC for monitoring up to 16 power supply voltage inputs. Twenty-six GPIO pins can be used for power enable terminals, power-on reset signals, external interrupts, cascading, or other system functions. Twelve of these pins provide PWM functionality. With these pins, the UCD90160A can support margin adjustment and general-purpose PWM functions.

Electronic systems (including CPUs, DSPs, microcontrollers, FPGAs, ASICs, etc.) may have multiple voltage rails and require specific power on/off sequences for normal operation. The UCD90160A can control up to 16 voltage rails and ensure correct power sequencing under normal and fault conditions.

In addition to sequencing, the UCD90160A can continuously monitor rail voltages and fault conditions and report system health information to the PMBus host, improving the long-term reliability of the system. Moreover, the UCD90160A can protect the electronic system by responding to power system faults. Fault responses can be conveniently configured using the Fusion Digital Power Designer software. Fault events are stored with timestamps in the on-chip non-volatile flash memory to assist in fault analysis.

System reliability can be improved by performing corner tests during system verification. During corner tests, each voltage rail needs to operate at the minimum and maximum output voltages, commonly referred to as margin adjustment. The UCD90160A can perform closed-loop margin adjustment on up to 10 voltage rails. During normal operation, the UCD90160A can also actively...

• Monitors and sequences 16 voltage rails
• All voltage rails sampled every 400μs
• 12-bit ADC with 2.5V, 0.5% internal V_REF
• Sequencing based on time, voltage rail, and pin dependencies
• 4 programmable UV and OV thresholds per monitor
• Non-volatile fault and peak logging per monitor (up to 12 detailed fault entries)
• Closed-loop margining capability for 10 voltage rails
• Margin outputs adjust rail voltage to match user-defined margin thresholds
• Programmable watchdog timer and system reset
• Easy cascading and coordination of multiple power sequencers for fault response
• Pin-selectable power rail status for ACPI support
• Flexible digital I/O configuration
• Multiple device cascading
• Responds to and monitors GPI-triggered faults
• Multiphase PWM clock generator, clock frequency 15.259kHz to 125MHz
• Independent clock output configuration for synchronous switch-mode power supplies
• JTAG and I²C/SMBus/PMBus interfaces

• Wired network and wireless infrastructure
• Data communication modules
• Data center and enterprise computing
• Factory automation and control
• Test and measurement, medical