LTC4215-1
LTC4215-3

RECOMMENDED FOR NEW DESIGNS

Hot Swap Controller with I²C Compatible Monitoring

Part Models: 8
1ku List Price: Starting From $4.29

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Part Details

Allows Safe Insertion into Live Backplane
8-Bit ADC Monitors Current and Voltage
I²C/SMBus Interface
Wide Operating Voltage Range: 2.9V to 15V
dI/dt Controlled Soft-Start
Circuit Breaker Timeout: 20μs (LTC4215-1) or 420μs (LTC4215-3)
Three General Purpose Outputs
High Side Drive for External N-channel MOSFET
No External Gate Capacitor Required
Input Overvoltage/Undervoltage Protection
Optional Latch-off or Auto-Retry After Faults
Alerts Host After Faults
Inrush Current Limit with Foldback
Available in 24-Pin (4mm × 5mm) QFN

The LTC4215-1/LTC4215-3 Hot Swap^™ controllers allow a board to be safely inserted and removed from a live backplane. Using an external N-channel pass transistor, board supply

voltage and inrush current are ramped up at an adjustable rate. An I²C interface and on-board ADC allow for monitoring of load current, voltage and fault status.

The device features adjustable foldback current limit and a soft-start pin that sets the dI/dt of the inrush current. An I²C interface may configure the part to latch-off or automatically restart after the LTC4215-1/LTC4215-3 detect a current limit fault.

The controller has additional features to interrupt the host when a fault has occurred, provide three general purpose outputs, notify when output power is good, detect insertion of a load card, and power-up either automatically upon insertion or wait for an I²C command to turn on.

The LTC4215-1 has a 20μs circuit breaker filter for applications that require a fast fault response time. The LTC4215-3 has an extended 420μs circuit breaker filter for applications where supply transients may exceed 20μs.


	Circuit Breaker Timeout	General Purpose Outputs
LTC4215	20μs	1
LTC4215-1	20μs	3
LTC4215-2	420μs	1
LTC4215-3	420μs	3

Applications

Live Board Insertion
Electronic Circuit Breakers
Computers, Servers
Platform Management

Part Models: 8
1ku List Price: Starting From $4.29

Documentation

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
LTC4215CUFD-1#PBF	24-Lead QFN (4mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC4215CUFD-1#TRPBF	24-Lead QFN (4mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC4215CUFD-3#PBF	24-Lead QFN (4mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC4215CUFD-3#TRPBF	24-Lead QFN (4mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC4215IUFD-1#PBF	24-Lead QFN (4mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC4215IUFD-1#TRPBF	24-Lead QFN (4mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC4215IUFD-3#PBF	24-Lead QFN (4mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC4215IUFD-3#TRPBF	24-Lead QFN (4mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys

This is the most up-to-date revision of the Data Sheet.

Hardware Ecosystem

Parts	Product Life Cycle	Description
Current Sense Amplifiers 1
LTC2990	RECOMMENDED FOR NEW DESIGNS	Quad I²C Voltage, Current and Temperature Monitor
I²C Isolators 1
LTM2883	PRODUCTION	SPI/Digital or I²C μModule Isolator with Adjustable ±12.5V and 5V Regulated Power
Low Voltage Hot Swap Controllers 1
LTC4280	RECOMMENDED FOR NEW DESIGNS	Hot Swap Controller with I²C Compatible Monitoring

Tools & Simulations

LTspice

Models for the following parts are available in LTspice:

LTC4215
LTC4215-1
LTC4215-2
LTC4215-3

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.