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LTC2933
1
2933f
For more information www.linear.com/LTC2933
V
DD33
GPI1
DC/DC
CONVERTERS
GPI2
GPIO2
GPIO1
RST
OV
ALERT
GPIO3
SDA
SCL
SYSTEM
LTC2933
GND
V1
MR
220nF
V2 V3 V4 V5 V6
ASEL
2.5V
1.8V
1.5V
12V
5V
3.3V
2933 TA01a
100nF
n
Supervises 6 Power Supplies
n
I
2
C Adjustable UV and OV Trip Points
n
Guaranteed Threshold Accuracy: ±1%
n
I
2
C/SMBus Interface
n
Internal EEPROM
n
256 Programmable Thresholds per Channel
n
Up to Three Range Settings per Channel
n
Tw o General Purpose Inputs
n
Three General Purpose Inputs/Outputs
n
Programmable Output Delays
n
Supply Voltage Range, 3.4V to 13.9V
n
Supply Voltage Power Sharing from V1 to V4
n
16-Lead 5mm × 4mm DFN and SSOP Packages
TYPICAL APPLICATION
FEATURES
APPLICATIONS
DESCRIPTION
Programmable Hex Voltage
Supervisor with EEPROM
The LT C
®
2933 is an EEPROM configurable voltage su-
pervisor which
can simultaneously monitor up to six
power supply voltage inputs. Each voltage detector offers
programmable over/undervoltage thresholds in various
ranges and increments.
Tw o general purpose inputs (GPI) can be configured as
programmable manual reset (MR), UV disable (UVDIS),
margin (MARG) or auxiliary comparator (AUXC) inputs.
Three general purpose pins (GPIO) can be configured for
input or output operation. When configured as an input, a
GPIO pin can be mapped to any other GPIO configured as
output. The GPIO pins can also be configured as ALERT
or fault outputs. Faults can be configured with program
-
mable delay-on-release times. Output type and polarity
are also configurable.
Status and history registers log faults and can be polled
via the I
2
C interface. A fault log snapshot is also backed
up in internal EEPROM. All parameters are programmable
via the I
2
C interface. Configuration EEPROM supports
autonomous operation without additional software.
Precision Multiple Power Supply Supervisor
n
High Availability Computer Systems
n
Network Servers
n
Telecom Equipment
n
Data Storage
L, LT , LT C , LT M, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. All other trademarks are the property of their respective owners.
Normalized V1 to V6 Threshold
vs Temperature
TEMPERATURE (°C)
–50
0.990
NORMALIZED THRESHOLD
1.000
–25 0 5025 75
1.010
0.995
1.005
100
2933 TA01b
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