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LTC4245

Features: Allows Safe Insertion into Live CompactPCITM or PCI ExpressTM Backplane 8-Bit ADC Monitors Current and Voltage I2CTM/SMBus Interface dI/dt Controlled Soft Start Simultaneous or Sequenced Turn-On ±20V Absolute Maximum Rating for ±12V Supplies No External Gate Capacitor Required Dual-Leve...

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SeekIC No. : 004402501 Detail

LTC4245: Features: Allows Safe Insertion into Live CompactPCITM or PCI ExpressTM Backplane 8-Bit ADC Monitors Current and Voltage I2CTM/SMBus Interface dI/dt Controlled Soft Start Simultaneous or Sequenced ...

LTC4245 Data Sheet

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Part Number:
LTC4245
Supply Ability:
5000

Price Break

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

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Product Details

Description



Features:

Allows Safe Insertion into Live CompactPCITM or PCI ExpressTM Backplane
8-Bit ADC Monitors Current and Voltage
I2CTM/SMBus Interface
dI/dt Controlled Soft Start
Simultaneous or Sequenced Turn-On
±20V Absolute Maximum Rating for ±12V Supplies
No External Gate Capacitor Required
Dual-Level Circuit Breaker and Current Limit
Bus Precharge Output
Power Good Input with Timeout
Optional Latchoff or Autoretry After Faults
Alerts Host After Faults
Integrated LOCAL_PCI_RST# Logic
36-Pin SSOP and 38-Pin (5mm * 7mm) QFN Packages


Application

Live Board Insertion
CompactPCI, CompactPCI Express, CompactTCA, PCI Express Systems


Pinout

Connection Diagram


Specifications

Supply Voltages
12VIN ..................................................... 0.3V to 20V
5VIN, 3VIN .............................................. 0.3V to 10V
VEEIN ...................................................... 20V to 0.3V
INTVCC .................................................. 0.3V to 6.5V
Input Voltages
BD_SEL#, ON, PGI ................................. 0.3V to 12V
ADR0-3, CFG, SS, TIMER ........ 0.3V to INTVCC + 0.3V
PCI_RST#, SCL, SDA ............................. 0.3V to 6.5V
Output Voltages
ALERT#, GPIO1-3, HEALTHY#,
LOCAL_PCI_RST# ................................. 0.3V to 6.5V
Analog Voltages (n is 5V, 3V)
12VGATE ................................................. 0.3V to 25V
nGATE (Note 3) ............... 0.3V to 12VIN + 0.3V or 14V
VEEGATE VEEIN (Note 4) .......................... 0.3V to 5V
12VSENSE ........... 0.3V or 12VIN 6V to 12VIN + 0.3V
nSENSE ..........................................0.3V to nIN + 0.3V
VEESENSE ..................................... VEEIN 0.3V to 0.3V
12VOUT 12VGATE (Note 4) ..................... 5V to 0.3V
nOUT nGATE (Note 4) ............................ 5V to 0.3V
VEEOUT (Note 5) ..................................... 20V to 0.3V
PRECHARGE ............................... 0.3V to 3VIN + 0.3V
Operating Temperature Range
LTC4245C ................................................ 0 to 70
LTC4245I ............................................. 40 to 85
Storage Temperature Range
G Package .......................................... 65 to 150
UHF Package ...................................... 65 to 125
Lead Temperature (Soldering, 10 sec)
G Package ......................................................... 300



Description

The LTC4245 Hot SwapTM controller allows a board to be safely inserted and removed from a live backplane in multiple supply systems such as CompactPCI and PCI Express. Using four external N-channel pass transistors, the board supply voltages can be ramped up at an adjustable rate and in any desired sequence. An I2C interface and onboard ADC of LTC4245 allow monitoring of board current, voltage and fault status for each supply.

The LTC4245 features adjustable dI/dt controlled soft start and foldback limited inrush current. A dual-level timed circuit breaker and fast current limit protect each supply against overcurrent faults. A power good input with timeout allows a downstream supply monitor to disconnect the board supplies. The LTC4245 can be confi gured to function without a 12V supply or with an extra 3.3V supply instead of a 5V supply.

The controller LTC4245 has additional features to interrupt the host when a fault has occurred, notify when output power is good, detect insertion of a load card and power-up in either the on or off state.




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