LTC2936
Programmable Hex Voltage
Supervisor with EEPROM and
Comparator Outputs
Fea T Descrip T
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Supervises 6 Power Supplies The LTC 2936 is an EEPROM configurable voltage super-
2
n
I C Adjustable UV and OV Trip Points visor which can simultaneously monitor up to six power
2
n
Guaranteed Threshold Accuracy: 1% (Maximum) supply voltage inputs. Each voltage detector offers I C
2
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I C/SMBus Interface programmable overvoltage/undervoltage thresholds in
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Internal EEPROM various ranges and increments and a dedicated compara-
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Six Comparator Outputs tor output.
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Fast Comparator Response Time: 7.5s
Two general purpose inputs (GPI) can be configured as
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256 Programmable Thresholds per Channel
programmable manual reset (MR), UV disable (UVDIS),
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Three Range Settings per Channel
margin (MARG), Write Protect (WP) or auxiliary compara-
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Two General Purpose Inputs
tor (AUXC) inputs. Three general purpose pins (GPIO)
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Three General Purpose Inputs/Outputs
can be configured for input or output operation. When
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Programmable Output Delays
configured as an input, a GPIO pin can be mapped to any
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Can Be Powered from 3.3V, or 3.4V to 13.9V
other GPIO configured as output. The GPIO pins can also
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24-Pin 4mm 5mm QFN and SSOP Packages
be configured as ALERT or fault outputs. Faults can be
configured with programmable delay-on-release times.
a T
Output type and polarity are also configurable.
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High Availability Computer Systems
Status and history registers log faults and can be polled
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Network Servers
2
via the I C interface. A fault snapshot is also backed up
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Telecom Equipment
in internal EEPROM. All parameters are programmable
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Data Storage Systems
2
via the I C interface. Configuration EEPROM supports
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
autonomous operation without additional software.
Technology Corporation. All other trademarks are the property of their respective owners.
Patent Pending.
Typical a T
12V
V1 to V6 Error vs Temperature
1
5V
3.3V
2.5V
DC/DC
1.8V
CONVERTERS 0.5
1.5V
1.2V
0
V1 V2 V3 V4 V5 V6 SYSTEM
CMP1
CMP2
OV
CMP3 GPIO1
0.5
RST
CMP4 GPIO2
FPGA
LTC2936 ALERT
CMP5 GPIO3
CMP6
UVDIS
1
GPI1 SDA
MARG 50 25 0 25 50 75 100
GPI2 SCL
V V
PWR DD33 GND ASEL1 ASEL0
TEMPERATURE (C)
2936 TA01a 2936 TA01b
0.1F
0.1F
2936fa
1
For more information www.linear.com/LTC2936
THRESHOLD ERROR (%)
ion pplica
ions pplica
ion uresLTC2936
a Te Maxi Mu M r a T (Notes 1, 2)
Supply Voltages Operating Temperature Range
V .......................................................0.3V to 14V LTC2936C ................................................ 0C to 70C
PWR
V .................................................... 0.3V to 3.6V LTC2936I .............................................40C to 85C
DD33
Digital Input/Output Voltages Storage Temperature Range ................ 65C to 150C*
SDA, SCL, GPI1, GPI2 .............................. 0.3V to 6V Maximum Junction Temperature ........................ 125C*
GPIO1-GPIO3, CMP1-CMP6 ....................0.3V to 14V Lead Temperature Range (Soldering, 10 sec)
ASEL0, ASEL1 .....................................0.3V to V SSOP Package ..................................................300C
DD33
Analog Voltages
* See Applications Information section for detailed EEPROM derating
V1-V6 ....................................................... 0.3V to 6V
information for junction temperatures in excess of 85C.
p in c F T
TOP VIEW TOP VIEW
1 24 V4
V3
24 23 22 21 20
2 23 V5
V2
V1 1 19 GPI1
3 22 V6
V1
V
2 18 GPI2
PWR
4 21 GPI1
V
PWR
V 3 17 SCL
DD33
5 20 GPI2
V
DD33
25
GND 4 16 SDA
6 19 SCL
GND
GPIO3 5 15 GPIO1
7 18 SDA
GPIO3
ASEL0 6 14 GPIO2
8 17 GPIO1
ASEL0
ASEL1 7 13
CMP5
8 9 10 11 12
9 16 GPIO2
ASEL1
10 15 CMP5
CMP4
11 14 CMP6
CMP3
12 13 CMP1 UFD PACKAGE
CMP2
24-LEAD (4mm 5mm) PLASTIC QFN
GN PACKAGE
= 125C, = 43C/W, = 3.4C/W
T
JMAX JA JCbottom
24-LEAD PLASTIC SSOP
EXPOSED PAD (PIN 25) IS GND
T = 125C, = 88C/W, = 30C/W
JMAX JA JCtop PCB CONNECTION IS OPTIONAL