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.