Vmarg

Closed Loop

Margining

UCD90160

VMON

GPIO

12V

GPIO

3.3V OUT

VMON

1.8V OUT

0.8V OUT

VMON

VMON

VMON

VMON

VMON

VMON

12V OUT

3.3V OUT

12V OUT

1.8V OUT

GPIO

GPIO

0.8V OUT

PWM

2MHz

WDI from main

processor

GPIO

WDO

GPIO

POWER_GOOD

GPIO

WARN_OV_0.8V_

OR_12V

GPIO

SYSTEM RESET

GPIO

OTHER

SEQUENCER DONE

(CASCADE INPUT)

GPIO

I2C/

PMBUS

JTAG

/EN

DC-DC 1

VOUT

VFB

VIN

/EN

LDO1

VOUT

VIN

/EN

DC-DC 2

VOUT

VFB

VIN

3.3V

Supply

UCD90160

www.ti.com

SLVSAC8A

– NOVEMBER 2010 – REVISED APRIL 2011

16-Rail Power Supply Sequencer and Monitor with ACPI Support

Check for Samples: UCD90160

1

FEATURES

DESCRIPTION

2

•

Monitor and Sequence 16 Voltage Rails

power-supply sequencer and monitor. The device

– All Rails Sampled Every 400 μs

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

– Sequence Based on Time, Rail and Pin

reset signals, external interrupts, cascading, or other

Dependencies

system functions. Twelve of these pins offer PWM

– Four Programmable Undervoltage and

functionality. Using these pins, the UCD90160 offers

Overvoltage Thresholds per Monitor

support for margining, and general-purpose PWM

•

Nonvolatile Error and Peak-Value Logging per

functions.

Monitor (up to 12 Fault Detail Entries)

Specific power states can be achieved using the

•

Closed-Loop Margining for 10 Rails

Pin-Selected Rail States feature. This feature allows

with the use of up to 3 GPIs to enable and disable

– Margin Output Adjusts Rail Voltage to

any rail. This is useful for implementing system

Match User-Defined Margin Thresholds

low-power modes and the Advanced Configuration

•

Programmable Watchdog Timer and System

and Power Interface (ACPI) specification that is used

Reset

for hardware devices.

•

Pin Selected Rail States for ACPI Support

The TI Fusion Digital Power

™ designer software is

•

Flexible Digital I/O Configuration

provided for device configuration. This PC-based

graphical user interface (GUI) offers an intuitive

•

Multiphase PWM Clock Generator

interface for configuring, storing, and monitoring all

– Clock Frequencies From 15.259 kHz to 125

system operating parameters.

MHz

– Capability to Configure Independent Clock

Outputs for Synchronizing Switch-Mode

Power Supplies

•

™ Interfaces

APPLICATIONS

•

Industrial / ATE

•

Telecommunications and Networking

Equipment

•

Servers and Storage Systems

•

Any System Requiring Sequencing and

Monitoring of Multiple Power Rails

1

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas

Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

2

PMBus, Fusion Digital Power are trademarks of Texas Instruments.

PRODUCTION DATA information is current as of publication date.

Copyright

© 2010–2011, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.