LTC4222

PRODUCTION

Dual Hot Swap Controller with I²C Compatible Monitoring

Part Models: 8
1ku List Price: Starting From $6.96

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Overview

Allows Safe Insertion Into a Live Backplane
10-Bit ADC Monitors Currents and Voltages
I²C/SMBus Interface
Wide Operating Voltage Range: 2.9V to 29V
dI/dt Controlled Soft-Start
High Side Drive for External N-Channel MOSFETs
No External Gate Capacitors Required
Input Overvoltage/Undervoltage Protection
Optional Latchoff or Auto-Retry After Faults
Alert Host After Faults
Inrush Current Limit with Foldback
Available in 32-Pin (5mm × 5mm) QFN and 36-Pin SSOP Packages

The LTC4222 Hot Swap^™ controller allows two power paths to be safely inserted and removed from a live backplane. Using external N-channel pass transistors, board supply voltages and inrush currents are ramped up at an adjustable rate. An I²C interface and on-board ADC allows for monitoring of current, voltage and fault status for each channel.

The device features adjustable, analog, foldback current limit circuits and a Soft-Start circuit that sets the dI/dt of the inrush currents. An I²C interface may configure the part to latch off or automatically restart after the LTC4222 detects a fault on either channel.

The controller has additional features to interrupt the host when a fault has occurred, 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.

Applications

Live Board Insertion
Electronic Circuit Breakers
Computers, Servers
Platform Management

Part Models: 8
1ku List Price: Starting From $6.96

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
LTC4222CG#PBF	36-Lead SSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC4222CG#TRPBF	36-Lead SSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC4222CUH#PBF	32-Lead QFN (5mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC4222CUH#TRPBF	32-Lead QFN (5mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC4222IG#PBF	36-Lead SSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC4222IG#TRPBF	36-Lead SSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC4222IUH#PBF	32-Lead QFN (5mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC4222IUH#TRPBF	32-Lead QFN (5mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Nov 18, 2019 - 19_0266 Laser Top Mark for SSOP36/44/48 Packages assembled in ADPG and UTAC
		PCN19_0266_Form Material_Report Detailed Parts List
LTC4222CG#PBF	PRODUCTION
LTC4222CG#TRPBF	PRODUCTION
LTC4222IG#PBF	PRODUCTION
LTC4222IG#TRPBF	PRODUCTION
Jan 20, 2022 - 21_0269 Addition of Alternate Assembly Site ASE Taiwan for Select LFCSP Products
		PCN21_0269_Form Material_Report Detailed Change Description Qualification Results Summary
LTC4222CUH#PBF	PRODUCTION
LTC4222CUH#TRPBF	PRODUCTION
LTC4222IUH#PBF	PRODUCTION
LTC4222IUH#TRPBF	PRODUCTION

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

Software Resources

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Hardware Ecosystem

Parts	Product Life Cycle	Description
Interface Transceivers & Isolators 1
LTM2883	PRODUCTION	SPI/Digital or I²C μModule Isolator with Adjustable ±12.5V and 5V Regulated Power
Protection Switches & Controllers 1
LTC4353	RECOMMENDED FOR NEW DESIGNS	Dual Low Voltage Ideal Diode Controller

Tools & Simulations

LTspice

Models for the following parts are available in LTspice:

LTC4222

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.

Evaluation Kits

LTC4222 Demoboard | Dual Hot Swap Controller with I2C and ADC (Requires DC590)

Buy Now View Details

Product Details

DC1134A: Demo Board for LTC4222 Dual Hot Swap Controller with I²C Compatible Monitoring

Resources

DC1134A - Design File
9/24/2009

DC1134A - Schematic
9/24/2009

DC1134A - Demo Manual
9/24/2009

Reference Designs

View Detailed Reference Design

Features and Benefits

Analog Devices has worked closely with FPGA and processor manufacturers to develop verified power solutions that optimize cost, size and efficiency in high performance applications
Our reference designs are supported by an intuitive design tool set and IP
Our team can provide designs for quick prototypes that can speed time to market in the most complex applications