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LTC4242

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 0.25 AUX Switches` Limits Fault Current in 1µs` Force On Test Mode` Adjustable S...

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SeekIC No. : 004402497 Detail

LTC4242: 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 Pin...

LTC4242 Data Sheet

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Part Number:
LTC4242
Supply Ability:
5000

Price Break

  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Upload time: 2024/11/23

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Product Details

Description



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 0.25 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


Application

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


Pinout

Connection Diagram


Specifications

Supply Voltages
   VCC ............................................................ 0.3V to 7V
   12VINn ..................................................... 0.3V to 20V
   3VINn ....................................................... 0.3V to 10V
   AUXINn .................................................... 0.3V to 10V
Input Voltages
   ONn, AUXONn, FONn ................................. 0.3V to 7V
   ENn ........................................................... 0.3V to 7V
Output Voltages
  FAULTn, PGOODn, AUXFAULTn,
   AUXPGOODn ............................................. 0.3V to 7V
Analog Voltages
   12VSENSEn ............................................... 0.3V to 20V
   12VGATEn ................................................ 0.3V to 25V
   12VOUTn (Note 3) .. 12VGATEn 5V to 12VGATEn + 0.3V
   AUXOUTn, 3VSENSEn ................................ 0.3V to 10V
   3VGATEn .................................................. 0.3V to 14V
   3VOUTn (Note 3) ....... 3VGATEn 5V to 3VGATEn + 0.3V
Operating Temperature Range
   LTC4242C ................................................... 0to 70
   LTC4242I ............................................... 40to 85
Storage Temperature Range
   SSOP ................................................... 65 to 150
   QFN ..................................................... 65 to 125
Lead Temperature (Soldering, 10 sec)
   SSOP .................................................................. 300


Description

The LTC4242 Hot SwapTM 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 of LTC4242 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 of LTC4242 at the VCC 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.




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