LTC2936_15 Datasheet, PDF (1/30 Pages) Linear Technology – Programmable Hex Voltage Supervisor with EEPROM and Comparator Outputs

LTC2936
Programmable Hex Voltage
Supervisor with EEPROM and
Comparator Outputs
Features
Description
n _{Supervises 6 Power Supplies}
n _I²_{C Adjustable UV and OV Trip Points}
n _{Guaranteed Threshold Accuracy: ±1% (Maximum)}
n _I²_{C/SMBus Interface}
n _{Internal EEPROM}
n _{Six Comparator Outputs}
n _{Fast Comparator Response Time: 7.5µs}
n _{256 Programmable Thresholds per Channel}
n _{Three Range Settings per Channel}
n _{Two General Purpose Inputs}
n _{Three General Purpose Inputs/Outputs}
n _{Programmable Output Delays}
n _{Can Be Powered from 3.3V, or 3.4V to 13.9V}
n _{24-Lead 4mm × 5mm QFN and SSOP Packages}
Applications
The LTC^®2936 is an EEPROM configurable voltage super-
visor which can simultaneously monitor up to six power
supply voltage inputs. Each voltage detector offers I²C
programmable overvoltage/undervoltage thresholds in
various ranges and increments and a dedicated compara-
tor output.
Two general purpose inputs (GPI) can be configured as
programmable manual reset (MR), UV disable (UVDIS),
margin (MARG), Write Protect (WP) or auxiliary compara-
tor (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 programmable delay-on-release times.
Output type and polarity are also configurable.
n _{High Availability Computer Systems}
n _{Network Servers}
n _{Telecom Equipment}
n _{Data Storage}
Status and history registers log faults and can be polled
via the I²C interface. A fault snapshot is also backed up
in internal EEPROM. All parameters are programmable
via the I²C interface. Configuration EEPROM supports
autonomous operation without additional software.
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.
Patent Pending.
Typical Application
12V
5V
3.3V
DC/DC
2.5V
CONVERTERS
1.8V
1.5V
1.2V
FPGA
UVDIS
MARG
0.1µF
CMP1
V1 V2 V3 V4 V5 V6
CMP2
CMP3
GPIO1
CMP4
CMP5
LTC2936
GPIO2
GPIO3
CMP6
GPI1
SDA
GPI2 _{VPWR VDD33}
GND ASEL1 ASEL0 ^SCL
0.1µF
2936 TA01a
OV
RST
ALERT
SYSTEM
For more information www.linear.com/LTC2936
V1 to V6 Error vs Temperature
1
0.5
0
–0.5
–1
–50
–25 0 25 50
TEMPERATURE (°C)
75 100
2936 TA01b
2936f
1