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LT3800

Features: `Wide 4V to 60V Input Voltage Range`Output Voltages up to 36V`Adaptive Nonoverlap Circuitry Prevents Switch Shoot-Through`Reverse Inductor Current Inhibit for Discontinuous Operation Improves Efficiency with Light Loads`Output Slew Rate Controlled Soft-Start with Auto-Reset`100A No Load ...

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SeekIC No. : 004401157 Detail

LT3800: Features: `Wide 4V to 60V Input Voltage Range`Output Voltages up to 36V`Adaptive Nonoverlap Circuitry Prevents Switch Shoot-Through`Reverse Inductor Current Inhibit for Discontinuous Operation Impro...

LT3800 Data Sheet

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Part Number:
LT3800
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: 2024/12/25

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Product Details

Description



Features:

`Wide 4V to 60V Input Voltage Range
`Output Voltages up to 36V
`Adaptive Nonoverlap Circuitry Prevents Switch Shoot-Through
`Reverse Inductor Current Inhibit for Discontinuous Operation Improves Efficiency with Light Loads
`Output Slew Rate Controlled Soft-Start with Auto-Reset
`100A No Load Quiescent Current
`Low 10A Current Shutdown
`1% Regulation Accuracy
`200kHz Operating Frequency
`Standard Gate N-Channel Power MOSFETs
`Current Limit Unaffected by Duty Cycle
`Reverse Overcurrent Protection
`16-Lead Thermally Enhanced TSSOP Package


Application

·12V and 42V Automotive and Heavy Equipment
·48V Telecom Power Supplies
·Avionics and Industrial Control Systems
·Distributed Power Converters


Pinout

Connection Diagram


Specifications

Supply Voltages
Input Supply Pin (VIN) .............................. 0.3V to 65V
Boosted Supply Pin (BOOST) ................... 0.3V to 80V
Boosted Supply Voltage (BOOST SW) .. 0.3V to 24V
Boosted Supply Reference Pin (SW) ........... 2V to 65V
Local Supply Pin (VCC) ............................. 0.3V to 24V
Input Voltages
SENSE+, SENSE ..................................... 0.3V to 40V
SENSE+ SENSE ....................................... 1V to 1V
BURST_EN Pin ........................................... 0.3V to 24V
Other Inputs (SHDN, CSS, VFB, VC) ..........0.3V to 5.0V
Input Currents
SHDN, CSS ............................................... 1mA to 1mA
Maximum Temperatures
Operating Junction Temperature Range (Note 2)
LT3800E (Note 3) ............................. 40°C to 125°C
LT3800I ............................................ 40°C to 125°C
Storage Temperature Range ..............65°C to 150°C
Lead Temperature (Soldering, 10 sec)................. 300°C


Description

The LT®3800 is a 200kHz fixed frequency high voltage synchronous current mode step-down switching regulator controller. The IC drives standard gate N-channel power MOSFETs and can operate with input voltages from 4V to 60V. An onboard regulator provides IC power directly from VIN and provides for output-derived power to minimize VIN quiescent current. MOSFET drivers employ an internal dynamic bootstrap feature, maximizing gate-source "ON" voltages during normal operation for improved operating efficiencies. The LT3800 incorporates Burst Mode® operation, which reduces no load quiescent current to under 100A. Light load efficiencies are also improved through a reverse inductor current inhibit, allowing the controller to support discontinuous operation. Both Burst Mode operation and the reverse-current inhibit features can be disabled if desired. The LT3800 incorporates a programmable soft-start that directly controls the voltage slew rate of the converter output for reduced startup surge currents and overshoot errors. The LT3800 is available in a 16-lead thermally enhanced TSSOP package.




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