UCD90160A Datasheet, PDF (1/59 Pages) Texas Instruments – 16-Rail Power Supply Sequencer and Monitor

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UCD90160A
SLVSDD4 – SEPTEMBER 2016
UCD90160A 16-Rail Power Supply Sequencer and Monitor With ACPI Support
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 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
• 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
• 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 and ATE
• Telecommunications and Networking Equipment
• Servers and Storage Systems
• Systems Requiring Sequencing and Monitoring of
Multiple Power Rails
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.
PART NUMBER
UCD90160A
Device Information⁽¹⁾
PACKAGE
BODY SIZE (NOM)
VQFN (64)
9.00 mm × 9.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Simplified Application Schematic
12-V OUT
12 V
12-V OUT
VOUT
3.3 V
VOUT
1.8 V
VOUT
0.8 V
WDI from main
processor
WDO
POWER_GOOD
WARN_OV_ 0.8 V
or WARN_OV_12 V
SYSTEM_RESET
Other sequencer done
(cascade input)
3.3-V Supply
V33A
VMON
VMON
V33D
GPIO
VMON
GPIO
VMON
UCD90160A
VMON
VMON
VMON
VMON
GPIO
GPIO
GPIO
GPIO
GPIO
GPIO
GPIO
GPIO
I2C/PMBUS
JTAG
PWM
VIN
VOUT
EN _DC-DC1
VFB
VOUT
3.3 V
VIN
EN
VOUT
LDO1
VOUT
1.8 V
VIN
VOUT
EN
DC-DC2
VFB
VOUT
0.8 V
2 MHz
VMARG
Closed loop
margining
Copyright © 2016, Texas Instruments Incorporated
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.