LTC4242 Series

Dual Slot Hot Swap Controller for PCI Express

Catalog

Dual Slot Hot Swap Controller for PCI Express

Part	Operating Temperature [Max]	Operating Temperature [Min]	Features	Voltage - Supply [Min]	Voltage - Supply [Max]	Programmable Features	Mounting Type	Package / Case	Current - Supply	Type	Number of Channels [custom]	Applications	Internal Switch(s)	Package / Case [x]	Supplier Device Package
Analog Devices LTC4242CUHF#TRPBF	70 °C	0 °C	Fault Timeout Thermal Limit UVLO	2.7 V	14.4 V	Auto Retry Current Limit Latched Fault Slew Rate	Surface Mount	38-WFQFN Exposed Pad	1.6 mA	Hot Swap Controller	6	PCI Express®	Both
Analog Devices LTC4242IG#PBF	85 °C	-40 °C	Fault Timeout Thermal Limit UVLO	2.7 V	14.4 V	Auto Retry Current Limit Latched Fault Slew Rate	Surface Mount	36-SSOP	1.6 mA	Hot Swap Controller	6	PCI Express®	Both	0.209 " 5.3 mm	36-SSOP
Analog Devices LTC4242IUHF#TRPBF	85 °C	-40 °C	Fault Timeout Thermal Limit UVLO	2.7 V	14.4 V	Auto Retry Current Limit Latched Fault Slew Rate	Surface Mount	38-WFQFN Exposed Pad	1.6 mA	Hot Swap Controller	6	PCI Express®	Both

Catalog

Dual Slot Hot Swap Controller for PCI Express

Key Features

• 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

Description

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 VCCpin allows the LTC4242 to endure supply transients. TheENinput detects the presence of a card in the PCI Express slot. TheFAULTandAUXFAULToutputs alert the system of overcurrent conditions on the main and auxiliary supplies, respectively.PGOODandAUXPGOODoutputs indicate proper main and auxiliary supply outputs.ApplicationsPCI Express-Based PC and ServersHot Swap Application for Triple Supply Systems