LTC2933_15 Datasheet, PDF (1/32 Pages) Linear Technology – Programmable Hex Voltage Supervisor with EEPROM

LTC2933
Programmable Hex Voltage
Supervisor with EEPROM
FEATURES
n _{Supervises 6 Power Supplies}
n _I²_{C Adjustable UV and OV Trip Points}
n _{Guaranteed Threshold Accuracy: ±1%}
n _I²_{C/SMBus Interface}
n _{Internal EEPROM}
n _{256 Programmable Thresholds per Channel}
n _{Up to Three Range Settings per Channel}
n _{Two 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}
APPLICATIONS
n _{High Availability Computer Systems}
n _{Network Servers}
n _{Telecom Equipment}
n _{Data Storage}
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. All other trademarks are the property of their respective owners.
DESCRIPTION
The LTC^®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.
Two 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 I²C interface. A fault log snapshot is also backed
up in internal EEPROM. All parameters are programmable
via the I²C interface. Configuration EEPROM supports
autonomous operation without additional software.
TYPICAL APPLICATION
Precision Multiple Power Supply Supervisor
100nF
220nF
12V
5V
DC/DC ^3.3V
CONVERTERS ^2.5V
1.8V
1.5V
V_DD33
MR
GPI1
GPI2
V1 V2 V3 V4 V5 V6
GPIO1
LTC2933
GPIO2
GPIO3
SDA
GND
ASEL
SCL
RST
OV
ALERT
SYSTEM
2933 TA01a
Normalized V1 to V6 Threshold
vs Temperature
1.010
1.005
1.000
0.995
0.990
–50 –25 0
25 50
TEMPERATURE (°C)
75 100
2933 TA01b
For more information www.linear.com/LTC2933
2933f
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