LT4220

RECOMMENDED FOR NEW DESIGNS

Dual Supply Hot Swap Controller

Part Models: 4
1ku List Price: Starting From $4.61

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Overview

Hot Swap^™ Controller for Positive and Negative Supplies
Supply Tracking Mode
±2.7V to ±16.5V Operation
Analog Current Limit with Foldback
Allows Safe Board Insertion and Removal from a Live Backplane
Open-Collector Power Good Comparators
Automatic Retry or Latchoff After a Current Fault
Dual Undervoltage Lockout Comparator Inputs
Current Fault Indication

The LT4220 16-pin dual voltage Hot Swap controller allows a board to be safely inserted and removed from a live backplane. The device operates with any combination of 2.7V to 16.5V and –2.7V to –16.5V supplies. Using two external N-channel pass transistors, the board supply voltages can be ramped up at an adjustable rate. A selectable tracking mode allows dual supply tracking control for ramping the positive and negative supplies together.

The LT4220 features foldback current limit and latches off both gates if either supply remains in current limit longer than an adjustable time amount. The IC can be configured for automatic restart after a delay set by the same timer.

A power good signal indicates when the output voltages monitored by the two FB comparators are within tolerance, and the gate drive signals are at their full on voltage.

The LT4220 is available in a 16-lead narrow SSOP package.

Applications

Live Board Insertion
RAID Systems
–5.2V ECL Supplies
Industrial Controls
Split Supply Systems

Part Models: 4
1ku List Price: Starting From $4.61

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
LT4220CGN#PBF	16-Lead SSOP (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT4220CGN#TRPBF	16-Lead SSOP (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT4220IGN#PBF	16-Lead SSOP (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT4220IGN#TRPBF	16-Lead SSOP (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Oct 3, 2024 - 24_0235 (QSOP/SSOP PKG) Migrating Bottom Trace Code Marking to Top Side Laser Marking
		PCN24_0235_Form Material_Report Other Delta Qualification Matrix
LT4220CGN#PBF	PRODUCTION
LT4220CGN#TRPBF	PRODUCTION
LT4220IGN#PBF	PRODUCTION
LT4220IGN#TRPBF	PRODUCTION
Oct 11, 2022 - 22_0235 Epoxy Change from Henkel 8290 to 8290A for GN Package
		PCN22_0235_Form Material_Report Qualification Results Summary Delta Qualification Matrix
LT4220CGN#PBF	PRODUCTION
LT4220CGN#TRPBF	PRODUCTION
LT4220IGN#PBF	PRODUCTION
LT4220IGN#TRPBF	PRODUCTION
Apr 6, 2022 - 22_0066 Laser Top Mark for 16QSOP Assembled in ADPG [PNG]
		PCN22_0066_Form Material_Report Delta Qualification Matrix
LT4220CGN#PBF	PRODUCTION
LT4220CGN#TRPBF	PRODUCTION
LT4220IGN#PBF	PRODUCTION
LT4220IGN#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
LTC4214	RECOMMENDED FOR NEW DESIGNS	Negative Voltage Hot Swap Controllers
LTC4218	RECOMMENDED FOR NEW DESIGNS	Hot Swap Controller

Tools & Simulations

LTspice

Models for the following parts are available in LTspice:

LT4220

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.