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LTC7860IMSE

HIGH EFFICIENCY SWITCHING SURGE

Manufacturer : Analog Devices, Inc
Package/Case : MSOP-12
Product Categories : Power Monitor, Control, & Protection ; Surge Stopper, Overvoltage & Overcurrent Protection
Datasheet: LTC7860IMSE Datasheet (PDF)
RoHs Status: Lead free / RoHS Compliant
In-stock: 5000

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LTC7860IMSE Product Details

The LTC7860IMSE high efficiency surge stopper protects loads from high voltage transients. High efficiency permits higher currents and smaller solution sizes. During an input overvoltage event, such as a load dump in vehicles, the LTC7860IMSE controls the gate of an external MOSFET to act as a switching DC/DC regulator (PROTECTIVE PWM mode). This operation regulates the output voltage to a safe level, allowing the loads to operate through the input over-voltage event. During normal operation (SWITCH-ON mode), the LTC7860IMSE turns on the external MOSFET continuously, passing the input voltage through to the output. An internal comparator limits the voltage across the current sense resistor and regulates the maximum output current to protect against overcurrent faults.

An adjustable timer limits the time that the LTC7860IMSE can spend in overvoltage or overcurrent regulation. When the timer expires, the external MOSFET is turned off until the LTC7860IMSE restarts after a cool down period. By strictly limiting the time in PROTECTIVE PWM Mode when the power loss is high, the components and thermal design can be optimized for normal operation and safely operate through high voltage input surges and/or overcurrent faults. An additional PMOS can be added for reverse battery protection.

LTC7860IMSE

Feature

  • High Efficiency VOUT Clamp Stops High Voltage Input Surges
  • SWITCH-ON Mode 100% Duty Cycle for Normal Operation
  • PROTECTIVE PWM Mode for Transients and Faults
  • VIN Pin to SGND Range: 3.5V to 60V
  • External Input Voltage is Extendable to 200V+
  • Adjustable Output Voltage Clamp
  • Adjustable Output Overcurrent Protection
  • Power Inductor Improves Input EMI in Normal Operation
  • Programmable Fault Timer
  • Adjustable Soft-Start for Input Inrush Current Limiting
  • 4.5% Retry Duty Cycle During Faults
  • Adjustable Switching Frequency: 50kHz to 850kHz
  • Optional Reverse Input Voltage Protection
  • Available in Thermally Enhanced 12-lead MSOP Package

Applications

  • Industrial and Automotive Power
  • Telecom Power
  • Vehicle Power Including ISO7637
  • Military Power Including MIL1275

Technical Parameters

  • # of Channels
  • 1
  • Power Management Function
  • Current Limit, Reverse Input Protection, Switching Surge Stopper
  • Vin Range
  • 60V (extendable to 200V+)
  • Total Quiescent Currenttyp | A
  • 770µ
  • Circuit Breaker Threshold
  • 95mV
  • Comments
  • Ride-through PWM switching protection, Adjustable output-clamp with timer, Current limit, Shutdown m

LTC7860IMSE Datasheet

  • LTC7860 Technical Documentation/Data sheet
    Download

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Analog Devices, Inc. was founded by two MIT graduates, Ray Stata and Matthew Lorber in 1965. The same year, the company released its first product, the model 101 op amp, which was a hockey-puck sized module used in test and measurement equipment. In 1967, the company published the first issue of its...
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