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LTC4251-1

Features: ` Allows Safe Board Insertion and Removal from a Live 48V Backplane` Floating Topology Permits Very High Voltage Operation` Low Profile (1mm) ThinSOTTM Package` Programmable Analog Current Limit with Circuit Breaker Timer` Fast Response Time Limits Peak Fault Current` Programmable Timer`...

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SeekIC No. : 004402503 Detail

LTC4251-1: Features: ` Allows Safe Board Insertion and Removal from a Live 48V Backplane` Floating Topology Permits Very High Voltage Operation` Low Profile (1mm) ThinSOTTM Package` Programmable Analog Current...

LTC4251-1 Data Sheet

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Part Number:
LTC4251-1
Supply Ability:
5000

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  • 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 Safe Board Insertion and Removal from a Live 48V Backplane
` Floating Topology Permits Very High Voltage Operation
` Low Profile (1mm) ThinSOTTM Package
` Programmable Analog Current Limit with Circuit Breaker Timer
` Fast Response Time Limits Peak Fault Current
` Programmable Timer
` Programmable Undervoltage/Overvoltage Protection


Application

` Hot Board Insertion
` Electronic Circuit Breaker
` 48V Distributed Power Systems
` Negative Power Supply Control
` Central Office Switching
` Programmable Current Limiting Circuit
` High Availability Servers
` Disk Arrays


Pinout

Connection Diagram


Specifications

Current into VIN (100ms Pulse) .......................... 100mA
Minimum VIN Voltage ........................................... 0.3V
Gate, UV/OV, Timer Voltage .......................0.3V to 16V
Sense Voltage ...........................................0.6V to 16V
Current Out of Sense Pin (20s Pulse) ............ 200mA
Maximum Junction Temperature .......................... 125°C
Operating Temperature Range
   LTC4251C/LTC4251-1C/LTC4251-2C ...... 0°C to 70°C
   LTC4251I/LTC4251-1I/LTC4251-2I .... 40°C to 85°C
Storage Temperature Range .............. 65°C to 150°C
Lead Temperature (Soldering, 10 sec).................. 300°C 


Description

The LTC®4251/LTC4251-1/LTC4251-2 negative voltage Hot SwapTM controllers allow a board to be safely inserted and removed from a live backplane. Output current is controlled by three stages of current limiting: a timed circuit breaker, active current limiting and a fast feedforward path that limits peak current under worst-case catastrophic fault conditions.

Programmable undervoltage and overvoltage detectors of LTC4251-1 disconnect the load whenever the input supply exceeds the desired operating range. The supply input is shunt regulated, allowing safe operation with very high supply voltages. A multifunction timer delays initial start-up and controls the circuit breaker's response time.

The LTC4251-1 UV/OV thresholds are designed to match the standard telecom operating range of 43V to 75V. The LTC4251-1 UV/OV thresholds extend the operating range to encompass 36V to 72V. The LTC4251-2 implements a UV threshold of 43V only.

LTC4251-1 are available in the 6-Pin SOT-23 package.




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