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LTC3351IUFF#TRPBF

Description
Hot Swap Voltage Controllers Hot Swappable High Current Supercapacitor Backup Controller and System Monitor
Categorysemiconductor    Power management   
File Size2MB,56 Pages
ManufacturerADI
Websitehttps://www.analog.com
Environmental Compliance
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LTC3351IUFF#TRPBF Overview

Hot Swap Voltage Controllers Hot Swappable High Current Supercapacitor Backup Controller and System Monitor

LTC3351IUFF#TRPBF Parametric

Parameter NameAttribute value
Product AttributeAttribute Value
ManufacturerADI
Product CategoryHot Swap Voltage Controllers
RoHSDetails
ProductControllers & Switches
Current LimitProgrammable
Supply Voltage - Max35 V
Supply Voltage - Min4.5 V
Number of Channels1 Channel
Operating Supply Current2.25 mA
Minimum Operating Temperature- 40 C
Maximum Operating Temperature+ 125 C
Mounting StyleSMD/SMT
Package / CaseQFN-44
PackagingReel
Power Fail DetectionYes
Input / Supply Voltage - Max35 V
Input / Supply Voltage - Min4.5 V
Factory Pack Quantity2500
LTC3351
Hot Swappable Supercapacitor Charger,
Backup Controller and System Monitor
FEATURES
n
n
DESCRIPTION
The
LTC
®
3351
is a backup power controller that charges
and monitors a series stack of one to four supercapacitors.
The LTC3351’s synchronous step-down controller drives
N-channel MOSFETs for constant current/constant voltage
charging with programmable input current limit. In addi-
tion, the step-down converter runs in reverse as a step-up
converter to deliver power from the supercapacitor stack
to the backup supply rail. Internal balancers eliminate the
need for external balance resistors and each capacitor has
a shunt regulator for overvoltage protection.
The LTC3351 monitors system voltages, currents, stack
capacitance and ESR which can all be read over the I
2
C/
SMBus port. The hot swap controller uses N-channel
MOSFETs for inrush control and a low loss path from the
input to the output. The ideal diode controller uses an
N-channel MOSFET for a low loss power path from the
supercapacitors to the output. The LTC3351 is available
in a thermally enhanced low profile 44-lead 4mm x 7mm
x 0.75mm QFN surface mount package.
All registered trademarks and trademarks are the property of their respective owners. Patents
pending.
n
n
n
n
n
n
n
Integrated Hot Swap Controller with Circuit Breaker
High Efficiency Synchronous Step-Down CC/CV
Charging of One to Four Series Supercapacitors
Step-Up Mode in Backup Provides Greater
Utilization of Stored Energy in Supercapacitors
16-Bit ADC for Monitoring System Voltages/
Currents, Capacitance and ESR
Programmable Undervoltage and Overvoltage
Thresholds to 35V
V
IN
: 4.5V to 35V, V
CAP(n)
: Up to 5V per Capacitor,
Charge/Backup Current: >10A
Programmable Input Current Limit Prioritizes System
Load Over Capacitor Charge Current
All N-FET Charger Controller and PowerPath Controller
Compact 44-Lead 4mm x 7mm QFN Package
APPLICATIONS
n
n
n
Swappable PCIe cards with NVM
High Current 12V Ride-Through UPS
Servers/Mass Storage/High Availability Systems
TYPICAL APPLICATION
I
CHG
(STEP-DOWN)
V
IN
HS_GATE
UV
OV
OUTFET
TGATE
SW
LTC3351
BGATE
ICAP
VCAP
CAP4
CAP3
CAP2
CAP1
CAPRTN
CAPFB
ISNSP_HS/ ISNSM
ISNSP_CHG
OUTFB
I
BACKUP
V
OUT
Example Hot Swap from 12V
V
IN
2V/DIV
V
CAP
< V
OUT
(STEP-UP)
V
CAP
> V
OUT
(DIRECT
CONNECT)
V
OUT
2V/DIV
I
IN
0.2A/DIV
5ms/DIV
10F
10F
10F
10F
3351 TA01a
I
2
C
V
CAP
3351 TA01
For more information
www.linear.com/LTC3351
1
3351f

LTC3351IUFF#TRPBF Related Products

LTC3351IUFF#TRPBF LTC3351EUFF#PBF LTC3351IUFF#PBF LTC3351EUFF#TRPBF
Description Hot Swap Voltage Controllers Hot Swappable High Current Supercapacitor Backup Controller and System Monitor Hot Swap Voltage Controllers Hot Swappable High Current Supercapacitor Backup Controller and System Monitor Hot Swap Voltage Controllers Hot Swappable High Current Supercapacitor Backup Controller and System Monitor Hot Swappable High Current Supercapacitor Backup Controller and System Monitor
Product Category Hot Swap Voltage Controllers Hot Swap Voltage Controllers Hot Swap Voltage Controllers Hot Swap Voltage Controller
Product Attribute Attribute Value Attribute Value Attribute Value -
Manufacturer ADI ADI ADI -
RoHS Details Details Details -
Product Controllers & Switches Controllers & Switches Controllers & Switches -
Current Limit Programmable Programmable Programmable -
Supply Voltage - Max 35 V 35 V 35 V -
Supply Voltage - Min 4.5 V 4.5 V 4.5 V -
Number of Channels 1 Channel 1 Channel 1 Channel -
Operating Supply Current 2.25 mA 2.25 mA 2.25 mA -
Minimum Operating Temperature - 40 C - 40 C - 40 C -
Maximum Operating Temperature + 125 C + 125 C + 125 C -
Mounting Style SMD/SMT SMD/SMT SMD/SMT -
Package / Case QFN-44 QFN-44 QFN-44 -
Packaging Reel Tube Tube -
Power Fail Detection Yes Yes Yes -
Input / Supply Voltage - Max 35 V 35 V 35 V -
Input / Supply Voltage - Min 4.5 V 4.5 V 4.5 V -
Factory Pack Quantity 2500 156 104 -
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