LTC4242

RECOMMENDED FOR NEW DESIGNS

Dual Slot Hot Swap Controller for PCI Express

Part Models: 8
1ku List Price: Starting From $3.96

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Overview

Allows Live Insertion into PCI Express^® Backplane
Controls Two Independent PCI Express Slots
Independent Control of Main and Auxiliary Supplies
20V Rating for 12V Supply Input Pins
Integrated 0.25Ω AUX Switches
Limits Fault Current in ≤1µs
Force On Test Mode
Adjustable Supply Voltage Power-Up Rate
High Side Drivers for N-Channel MOSFETs
Thermal Shutdown Protection
Available in 38-Lead QFN and 36-Lead SSOP Packages

The LTC4242 Hot Swap^™ controller allows safe board insertion and removal for two independent slots on a PCI Express backplane. External N-channel transistors control the 12V and 3.3V supplies while integrated switches control the 3.3V auxiliary supplies. Both 12V and 3.3V supplies can be ramped up at an adjustable rate. Dual level circuit breakers and fast active current limiting protect all supplies against overcurrent faults.

A supply filter at the V_CC pin allows the LTC4242 to endure supply transients. The EN input detects the presence of a card in the PCI Express slot. The FAULT and AUXFAULT outputs alert the system of overcurrent conditions on the main and auxiliary supplies, respectively. PGOOD and AUXPGOOD outputs indicate proper main and auxiliary supply outputs.

Applications

PCI Express-Based PC and Servers
Hot Swap Application for Triple Supply Systems

Part Models: 8
1ku List Price: Starting From $3.96

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
LTC4242CG#PBF	36-Lead SSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC4242CG#TRPBF	36-Lead SSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC4242CUHF#PBF	38-Lead QFN (5mm x 7mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC4242CUHF#TRPBF	38-Lead QFN (5mm x 7mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC4242IG#PBF	36-Lead SSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC4242IG#TRPBF	36-Lead SSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC4242IUHF#PBF	38-Lead QFN (5mm x 7mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC4242IUHF#TRPBF	38-Lead QFN (5mm x 7mm 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
LTC4242CG#PBF	PRODUCTION
LTC4242CG#TRPBF	PRODUCTION
LTC4242IG#PBF	PRODUCTION
LTC4242IG#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
LTC4245	LAST TIME BUY	Multiple Supply Hot Swap Controller with I²C Compatible Monitoring
LTC4244	PRODUCTION	Rugged, CompactPCI Bus Hot Swap Controllers

Tools & Simulations

LTspice

Models for the following parts are available in LTspice:

LTC4242

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.