LTC4227

RECOMMENDED FOR NEW DESIGNS

Dual Ideal Diode and Single Hot Swap Controller

Part Models: 24
1ku List Price: Starting From $4.09

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Overview

Power Path and Inrush Current Control for Redundant Supplies
Low Loss Replacement for Power Schottky Diodes
Allows Safe Hot Swapping from a Live Backplane
2.9V to 18V Operating Range
Controls N-Channel MOSFETs
Limits Peak Fault Current in ≤1μs
0.5μs Ideal Diode Turn-On and Reverse Turn-Off Time
Adjustable Current Limit with Circuit Breaker
Smooth Switchover without Oscillation
Adjustable Current Limit Fault Delay
Fault and Power Status Output
20-Lead 4mm × 5mm QFN and 16-Lead SSOP Packages

The LTC4227 offers ideal diode-OR and Hot Swap^™ functions for two power rails by controlling external Nchannel MOSFETs. MOSFETs acting as ideal diodes replace two high power Schottky diodes and the associated heat sinks, saving power and board area. A Hot Swap control MOSFET allows a board to be safely inserted and removed from a live backplane by limiting inrush current. The supply output is also protected against short-circuit faults with a fast acting current limit and internal timed circuit breaker.

The LTC4227 regulates the forward voltage drop across the MOSFETs to ensure smooth current transfer from one supply to the other without oscillation. The ideal diodes turn on quickly to reduce the load voltage droop during supply switchover. If the input supply fails or is shorted, a fast turn-off minimizes reverse-current transients.

The LTC4227 allows turn-on/off control, and reports fault and power good status for the supply.


Part	Overcurrent Fault	Start-Up Delay
LTC4227-1	Latch Off	100ms
LTC4227-2	Retry	100ms
LTC4227-3	Latch Off	1.6ms
LTC4227-4	Retry	1.6ms

Applications

Redundant Power Supplies and Supply Holdup
Computer Systems and Servers
Telecom Networks

Part Models: 24
1ku List Price: Starting From $4.09

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
LTC4227CGN-1#PBF	16-Lead SSOP (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC4227CGN-1#TRPBF	16-Lead SSOP (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC4227CGN-2#PBF	16-Lead SSOP (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC4227CGN-2#TRPBF	16-Lead SSOP (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC4227CUFD-1#PBF	20-Lead QFN (4mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC4227CUFD-1#TRPBF	20-Lead QFN (4mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC4227CUFD-2#PBF	20-Lead QFN (4mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC4227CUFD-2#TRPBF	20-Lead QFN (4mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC4227CUFD-3#PBF	20-Lead QFN (4mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC4227CUFD-3#TRPBF	20-Lead QFN (4mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC4227CUFD-4#PBF	20-Lead QFN (4mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC4227CUFD-4#TRPBF	20-Lead QFN (4mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC4227IGN-1#PBF	16-Lead SSOP (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC4227IGN-1#TRPBF	16-Lead SSOP (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC4227IGN-2#PBF	16-Lead SSOP (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC4227IGN-2#TRPBF	16-Lead SSOP (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC4227IUFD-1#PBF	20-Lead QFN (4mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC4227IUFD-1#TRPBF	20-Lead QFN (4mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC4227IUFD-2#PBF	20-Lead QFN (4mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC4227IUFD-2#TRPBF	20-Lead QFN (4mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC4227IUFD-3#PBF	20-Lead QFN (4mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC4227IUFD-3#TRPBF	20-Lead QFN (4mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC4227IUFD-4#PBF	20-Lead QFN (4mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC4227IUFD-4#TRPBF	20-Lead QFN (4mm x 5mm x 0.75mm w/ EP)	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
LTC4227CGN-1#PBF	PRODUCTION
LTC4227CGN-1#TRPBF	PRODUCTION
LTC4227CGN-2#PBF	PRODUCTION
LTC4227CGN-2#TRPBF	PRODUCTION
LTC4227IGN-1#PBF	PRODUCTION
LTC4227IGN-1#TRPBF	PRODUCTION
LTC4227IGN-2#PBF	PRODUCTION
LTC4227IGN-2#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
LTC4227CGN-1#PBF	PRODUCTION
LTC4227CGN-1#TRPBF	PRODUCTION
LTC4227CGN-2#PBF	PRODUCTION
LTC4227CGN-2#TRPBF	PRODUCTION
LTC4227IGN-1#PBF	PRODUCTION
LTC4227IGN-1#TRPBF	PRODUCTION
LTC4227IGN-2#PBF	PRODUCTION
LTC4227IGN-2#TRPBF	PRODUCTION
Apr 6, 2022 - 22_0066 Laser Top Mark for 16QSOP Assembled in ADPG [PNG]
		PCN22_0066_Form Material_Report Delta Qualification Matrix
LTC4227CGN-1#PBF	PRODUCTION
LTC4227CGN-1#TRPBF	PRODUCTION
LTC4227CGN-2#PBF	PRODUCTION
LTC4227CGN-2#TRPBF	PRODUCTION
LTC4227IGN-1#PBF	PRODUCTION
LTC4227IGN-1#TRPBF	PRODUCTION
LTC4227IGN-2#PBF	PRODUCTION
LTC4227IGN-2#TRPBF	PRODUCTION
Feb 14, 2025 - 25_0016 Bond Wire Change from Gold to Copper Wire (Notification Only)
		PCN25_0016_Form Material_Report Qualification Results Summary
LTC4227CUFD-1#PBF	PRODUCTION
LTC4227CUFD-1#TRPBF	PRODUCTION
LTC4227CUFD-2#PBF	PRODUCTION
LTC4227CUFD-2#TRPBF	PRODUCTION
LTC4227CUFD-3#PBF	PRODUCTION
LTC4227CUFD-3#TRPBF	PRODUCTION
LTC4227CUFD-4#PBF	PRODUCTION
LTC4227CUFD-4#TRPBF	PRODUCTION
LTC4227IUFD-1#PBF	PRODUCTION
LTC4227IUFD-1#TRPBF	PRODUCTION
LTC4227IUFD-2#PBF	PRODUCTION
LTC4227IUFD-2#TRPBF	PRODUCTION
LTC4227IUFD-4#PBF	PRODUCTION
LTC4227IUFD-4#TRPBF	PRODUCTION
Apr 9, 2025 - 25_0016 Bond Wire Change from Gold to Copper Wire (Notification Only)
		PCN25_0016_Form Material_Report Qualification Results Summary
LTC4227IUFD-3#PBF	PRODUCTION
LTC4227IUFD-3#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
Protection Switches & Controllers 3
LTC4229	RECOMMENDED FOR NEW DESIGNS	Ideal Diode and Hot Swap Controller
LTC4370	RECOMMENDED FOR NEW DESIGNS	Two-Supply Diode-OR Current Balancing Controller
LTC4228-1 LTC4228-2		Dual Ideal Diode and Hot Swap Controller

Parts	Product Life Cycle	Description
LTC4235	RECOMMENDED FOR NEW DESIGNS	Dual 12V Ideal Diode-OR and Single Hot Swap Controller with Current Monitor

Tools & Simulations

LTspice

Models for the following parts are available in LTspice:

LTC4227-1
LTC4227-2
LTC4227-3
LTC4227-4

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

LTC4227CUFD-2 Demo Board: Dual Ideal Diode and Single Hot Swap Controller with Fault Auto-Retry and 100ms On Delay

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Product Details

DC1625A-B: Demo Board for the LTC4227 Dual Ideal Diode and Single Hot Swap Controller.

Resources

DC1625A - Schematic
3/5/2014

DC1625A - Design Files
3/5/2014

DC1625A - Demo Manual
3/5/2014

LTC4227CUFD-4 Demo Board: Dual Ideal Diode and Single Hot Swap Controller with Fault Auto-Retry and 1.6ms On Delay

Buy Now View Details

Product Details

Demonstration circuit 1625A is intended to demonstrate performance of the LTC4227-1/LTC4227-2/LTC4227-3/LTC4227-4 dual ideal diode and Hot Swap^™ controller. Each rail has an individual ideal diode. Ideal diode outputs are connected to the load through a single Hot Swap circuit.