UCD90120A_15 Datasheet, PDF (1/58 Pages) Texas Instruments – 12-Rail Power Supply Sequencer and Monitor With ACPI Support

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UCD90120A
SLVSAN9B – APRIL 2011 – REVISED DECEMBER 2015
UCD90120A 12-Rail Power Supply Sequencer and Monitor With ACPI Support
1 Features
•1 Monitor and Sequence 12 Voltage Rails
– All Rails Sampled Every 400 μs
– 12-bit ADC With 2.5-V, 0.5% Internal V_REF
– 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
• Flexible Digital I/O Configuration
• Pin-Selected Rail States
• Multiphase 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
• Industrial / ATE
• Telecommunications and Networking Equipment
• Servers and Storage Systems
• Any System Requiring Sequencing and Monitoring
of Multiple Power Rails
3 Description
The UCD90120A is a 12-rail PMBus/I²C addressable
power-supply sequencer and monitor. The device
integrates a 12-bit ADC for monitoring up to 12
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 UCD90120A 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 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.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
UCD90120A
VQFN (64)
9.00 mm × 9.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
12V
I12V _INA196
Simplified Schematic
3.3V
Supply
12V OUT
TEMP12V
TEMP IC
12V OUT
3.3V OUT
1.8V OUT
0.8V OUT
I0.8V
TEMP0.8V
I12V
TEMP12V
WDI from main
processor
WDO
POWER_GOOD
WARN_OC_0.8V_
OR_12V
SYSTEM RESET
OTHER
SEQUENCER DONE
(CASCADE INPUT)
VMON
VMON
VMON
VMON
VMON
VMON
VMON
VMON
GPIO
GPIO
GPIO
GPIO
GPIO
GPIO
UCD90120A
I2C/
PMBUS
GPIO
GPIO
GPIO
GPIO
2MHz
PWM
VIN
VOUT
/EN
DC-DC 1
VFB
3.3V OUT
VIN
/EN VOUT
LDO1
1.8V OUT
TEMP0.8V
TEMP IC
VIN
VOUT
/EN
DC-DC 2
VFB
0.8V OUT
I0.8V
INA196
Vmarg
Closed Loop
Margining
JTAG
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.