1 Features
1• Monitor and sequence 16 voltage rails
– All rails sampled every 400 μs
– 12-Bit ADC with 2.5-V, 0.5% internal VREF
– 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
• Easily cascade multiple power sequencers and
take coordinated fault responses
• Pin selected rail states for ACPI support
• Flexible digital I/O configuration
• Cascading multiple devices
• Response and monitor to GPI-triggered fault
• Multi-phase 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

2 Applications
• Wired networking
• Wireless infrastructure
• Datacom module
• Data center and enterprise computing
• Factory automation and control
• Test and measurement
• Medical

3 Description
The UCD90160A is a 16-rail PMBus/I2C addressable
power supply sequencer and monitor. The device
integrates a 12-bit ADC for monitoring up to 16 power
supply voltage inputs. Twenty-six GPIO pins can be
used for power supply enables, power-on reset
signals, external interrupts, cascading, or other
system functions. Twelve of these pins offer PWM
functionality. Using these pins, the UCD90160A offers
support for margining, and general-purpose PWM
functions.
Specific power states can be achieved using the Pin-
Selected Rail States feature. This feature allows with
the use of up to 3 GPIs to enable and disable any
rail. This is useful for implementing system low-power
modes and the Advanced Configuration and Power
Interface (ACPI) specification that is used for
hardware devices.
The Fault Pin feature enables easily cascading
multiple devices and coordinates among those
devices to take synchronized fault responses.
The TI Fusion Digital Power™ designer software is
provided for device configuration. This PC-based
graphical user interface (GUI) offers an intuitive
interface for configuring, storing, and monitoring all
system operating parameters.