LTC4225-1
LTC4225-2

PRODUCTION

Dual Ideal Diode and Hot Swap Controller

Part Models: 16
1ku List Price: Starting From $4.30

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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 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
LTC4225-1: Latch Off After Fault
LTC4225-2: Automatic Retry After Fault
24-Lead 4mm × 5mm QFN and SSOP Packages

The LTC4225 offers ideal diode and Hot Swap^™ functions for two power rails by controlling external series connected N-channel MOSFETs. MOSFETs acting as ideal diodes replace two high power Schottky diodes and the associated heat sinks, saving power and board area. Hot Swap control MOSFETs allow boards 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 LTC4225 regulates the forward voltage drop across the back-to-back 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 switch-over. If the input supply fails or is shorted, a fast turn-off minimizes reverse-current transients.

The LTC4225 allows independent on/off control, and reports fault and power good status for the supply. The LTC4225-1 features a latch-off circuit breaker, while the LTC4225-2 provides automatic retry after a fault.

Applications

Redundant Power Supplies
Supply Holdup
MicroTCA Systems and Servers
Telecom Networks
Power Prioritizer

Part Models: 16
1ku List Price: Starting From $4.30

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
LTC4225CGN-1#PBF	24-Lead SSOP (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC4225CGN-1#TRPBF	24-Lead SSOP (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC4225CGN-2#PBF	24-Lead SSOP (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC4225CGN-2#TRPBF	24-Lead SSOP (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC4225CUFD-1#PBF	24-Lead QFN (4mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC4225CUFD-1#TRPBF	24-Lead QFN (4mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC4225CUFD-2#PBF	24-Lead QFN (4mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC4225CUFD-2#TRPBF	24-Lead QFN (4mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC4225IGN-1#PBF	24-Lead SSOP (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC4225IGN-1#TRPBF	24-Lead SSOP (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC4225IGN-2#PBF	24-Lead SSOP (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC4225IGN-2#TRPBF	24-Lead SSOP (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC4225IUFD-1#PBF	24-Lead QFN (4mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC4225IUFD-1#TRPBF	24-Lead QFN (4mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC4225IUFD-2#PBF	24-Lead QFN (4mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC4225IUFD-2#TRPBF	24-Lead QFN (4mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Aug 10, 2022 - 22_0177 Laser Top Mark Conversion for QSOP20_24_28 Assembled in ADPG [PNG] and UTL
		PCN22_0177_Form Material_Report Delta Qualification Matrix
LTC4225CGN-1#PBF	PRODUCTION
LTC4225CGN-1#TRPBF	PRODUCTION
LTC4225CGN-2#PBF	PRODUCTION
LTC4225CGN-2#TRPBF	PRODUCTION
LTC4225IGN-1#PBF	PRODUCTION
LTC4225IGN-1#TRPBF	PRODUCTION
LTC4225IGN-2#PBF	PRODUCTION
LTC4225IGN-2#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 2
LTC4227	RECOMMENDED FOR NEW DESIGNS	Dual Ideal Diode and Single Hot Swap Controller
LTC4228-1 LTC4228-2		Dual Ideal Diode and Hot Swap Controller

Tools & Simulations

LTspice 1

LTC4225-2 Demo Circuit - Dual 12V/7.6A Ideal Diode and Hot Swap Controller for µTCA

Models for the following parts are available in LTspice:

LTC4225-1
LTC4225-2

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.