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UCD9080 Datasheet Preview

UCD9080 Datasheet

8-CHANNEL POWER-SUPPLY SEQUENCER/MONITOR

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UCD9080
www.ti.com................................................................................................................................................... SLVS692E – SEPTEMBER 2006 – REVISED MAY 2008
8-CHANNEL POWER-SUPPLY SEQUENCER AND MONITOR
FEATURES
1
234 Single Supply Voltage: 3.3 V
Low Power Consumption
Sequences and Monitors up to Eight Voltage
Rails
Rail Voltages Sampled Every 50 µs With
3.2-mV Resolution
Four Configurable Digital Outputs for
Power-On Reset and Other Functions
Configurable Rail-Enable Output Polarity
Flexible Rail Sequencing: Timeline (ms),
Parent Rail Regulation Window, Parent Rail
Achieving Defined Threshold
Under- and Overvoltage Thresholds: Settable
Per-Rail
Regulation Expiration Time: Settable Per-Rail
Flexible Rail Shutdown: Parent Rail Shutdown
Can Shut Down Child Rails, Independent Rail
Configuration
Per-Rail Alarm Conditions, With Timestamp:
Under- and Overvoltage Glitch, Sustained
Under- and/or Overvoltage, Rail Did Not Start
I2C Interface for Configuration and Monitoring
Microsoft® Windows® GUI for Configuration
and Monitoring
APPLICATIONS
Telecommunications Switches
Servers
Networking Equipment
Test Equipment
Any System Requiring Sequencing of Multiple
Voltage Rails
DESCRIPTION
The UCD9080 power-supply sequencer controls the
enable sequence of up to eight independent voltage
rails and provides four general-purpose digital
outputs. The device operates from a 3.3-V supply,
provides 3.2-mV resolution of voltage rails, and
requires no external memory or clock. The UCD9080
monitors the voltage rails independently at more than
a 20-kHz rate and has a high degree of rail sequence
and rail error-response configurability. The
sequencing of rails can be based on time or on time
in conjunction with other rails achieving regulation or
a voltage threshold. In addition, each rail is monitored
for undervoltage and overvoltage glitches and
thresholds. Each rail the UCD9080 monitors can be
configured to shut down a user-defined set of other
rails, and alarm conditions are monitored on a per-rail
basis.
Figure 1 shows the UCD9080 power-supply
sequencer in a typical application.
10 kW
3.3 V
0.01 mF
3.3 V
3.3 V
3.3 V
3.3 V
100 kW
10 kW
10 kW
2
To I C
Master Device
A1
2
Slave I C
Address
A2
A3
A4
MON [1:8]
RST
EN [1:7]
XIN
TEST
ROSC
UCD 9080
VCC
SCL
SDA
VSS
EN8/
ADDR1/ ADDR2/ ADDR3/ ADDR4/
GPO1 GPO2 GPO3 GPO4
3.3 V
1 mF
3.3 V
Figure 1. Typical Application Diagram
Power
Supply
EN
1
VOUT1
Power
Supply
EN
2
VOUT2
Power
Supply
EN
X
VOUTX
Digital
Outputs
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.
TMS320 is a trademark of Texas Instruments.
2
Microsoft, Windows are registered trademarks of Microsoft Corporation.
3
All other trademarks are the property of their respective owners.
4
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 © 2006–2008, Texas Instruments Incorporated




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UCD9080 Datasheet Preview

UCD9080 Datasheet

8-CHANNEL POWER-SUPPLY SEQUENCER/MONITOR

No Preview Available !

UCD9080
SLVS692E – SEPTEMBER 2006 – REVISED MAY 2008................................................................................................................................................... www.ti.com
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
ORDERING INFORMATION
For the most current package and ordering information, see the Package Option Addendum at the end of this
document, or see the TI Web site at www.ti.com.
ABSOLUTE MAXIMUM RATINGS(1)
Voltage applied from VCC to VSS
Voltage applied to any pin(2)
Diode current at any device terminal
Tstg
Storage temperature
VALUE
–0.3 to 4.1
–0.3 to VCC + 0.3
±2
–40 to 85
UNIT
V
V
mA
°C
(1) Stresses beyond those listed under absolute maximum ratings may cause permanent damage to the device. These are stress ratings
only and functional operation of the device at these or any other conditions beyond those indicated under recommended operating
conditions is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
(2) All voltages referenced to VSS.
RECOMMENDED OPERATING CONDITIONS
Supply voltage during operation
VCC
Supply voltage during configuration changes
TA
Operating free-air temperature range
MIN
NOM
MAX UNIT
3
3.3
3.6
V
3
3.3
3.6
–40
85
°C
ELECTRICAL CHARACTERISTICS
These specifications are over recommended ranges of supply voltage and operating free-air temperature, unless otherwise
noted
PARAMETER
TEST CONDITIONS
MIN
SUPPLY CURRENT
IS
Supply current into VCC, excluding external
current
TA = 25°C
IC
Supply current during configuration
3.6 V
3
STANDARD INPUTS (RST, TEST)
VIL
Low-level input voltage
VCC = 3 V
VSS
VIH
High-level input voltage
VCC = 3 V
0.8 VCC
SCHMITT TRIGGER INPUTS (SDA, SCL, EN1, EN2, EN3, EN4, EN5, EN6, EN7, EN8/ADDR1, ADDR2, ADDR3, ADDR4)
VIT+
Positive-going input threshold voltage
VCC = 3 V
1.5
VIT–
Negative-going input threshold voltage
VCC = 3 V
0.9
Vhys
Input-voltage hysteresis, (VIT+ – VIT–)
VCC = 3 V
0.5
Ilkg
High-impedance leakage current
NOM
MAX UNIT
3
4 mA
7 mA
VSS + 0.6
V
VCC
V
1.9
V
1.3
V
1
V
±50 nA
2
Submit Documentation Feedback
Product Folder Link(s) :UCD9080
Copyright © 2006–2008, Texas Instruments Incorporated


Part Number UCD9080
Description 8-CHANNEL POWER-SUPPLY SEQUENCER/MONITOR
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