UCD90120 Datasheet, PDF (1/40 Pages) Texas Instruments – UCD90120 12-Channel Sequencer and System Health Monitor

UCD90120
www.ti.com.......................................................................................................................................................................................... SLVS966 – SEPTEMBER 2009
UCD90120 12-Channel Sequencer and System Health Monitor
FEATURES
1
•2 Monitor and Sequence 12 Voltage Rails
– All Rails Sampled Every 200µs
– 12-bit ADC With 2.5V, 0.5% Internal V_REF
– Sequence Based on Time, Rail and Pin
Dependencies
– Six Hardware Comparators for Power
Supply Fault Response in < 80µs
– Four Programmable Under-Voltage and
Over-Voltage Thresholds per Monitor
– Programmable Fault Response Including
Retries, Shutdown Slaves and Resequence
• Non-Volatile Error Logging
– Stores Up To 18 Faults
– Log Peak Values For All Monitor Inputs
• Closed Loop Margining for 10 Rails
– Margin Output Adjusts Rail Voltage to
Match User-Defined Margin Thresholds
– Unused Margin Outputs can be Used as
GPIOs or General-Purpose PWM Outputs
• Watchdog Timer and System Reset
– Programmable WDT Reset and Start Times
– Configurable System Reset Pulse Widths
• Flexible Digital I/O Configuration
– Boolean Logic Builder for GPO Config
– GPIOs can be Used as Enables, Resets,
Power Good and Other On-Board Functions
• Wide Range Single Supply (3.3V to 12V)
– Internal Temperature Sensor
– 64-Pin QFN Package
• JTAG and I²C/SMBus/PMBus Interfaces
• Fusion Digital Power™ GUI for Configuring
and Monitoring Device Operation
APPLICATIONS
• Industrial / ATE
• Telecommunications and Networking
Equipment
• Servers and Storage Systems
• Any System Requiring Sequencing and
Monitoring of Multiple Power Rails
DESCRIPTION
The UCD90120 Power Supply Sequencer and
System Health Monitor monitors and sequences up to
12 independent voltage rails. The device integrates a
12-bit ADC with a 2.5V internal reference for
monitoring up to 13 power supply voltage, current, or
temperature inputs.
26 GPIO pins can be used for power supply enables,
power-on reset signals, external interrupts, cascading
multiple UCD90120 devices, or other system
functions. 12 of these pins can be used as PWM
outputs for power supply margining or
general-purpose PWM functions including clock
generation for switch-mode power supplies.
The TI Fusion Digital Power Designer 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.
The UCD90120 has an I²C/PMBus/SMBus
communication interface for pre-production and
in-system configuring and monitoring and a JTAG
Port for production programming.
12V
I12V
INA196
3.3V_UCD
12V OUT
TEMP12V
TEMP IC
12V OUT
3.3V OUT
1.8V OUT
0.8V OUT
I0.8V
TEMP0.8V
I12V
TEMP12V
/MR
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
VMON
UCD90120
GPIO
GPIO
GPIO
GPIO
GPIO
GPIO
I2C/
PMBUS
JTAG
GPIO
GPIO
VIN
VOUT
/EN
DC-DC 1
VFB
3.3V OUT
GPIO
VIN
/EN VOUT
LDO1
1.8V OUT
GPIO
TEMP0.8V
TEMP IC
VIN
VOUT
/EN
DC-DC 2
VFB
0.8V OUT
I0.8V
INA196
PWM
2MHz
100kΩ
47pF
Vmarg
Rmrg
Closed Loop
Margining
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.
Fusion Digital Power is a trademark of Texas Instruments.
2
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2009, Texas Instruments Incorporated