LT3800

PRODUCTION

High-Voltage Synchronous Current Mode Step-Down Controller

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Part Details

  • 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
  • 100µA No Load Quiescent Current
  • Low 10µA 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
LT3800
High-Voltage Synchronous Current Mode Step-Down Controller
12V 75W DC/DC Converter with Reverse Current Inhibit and Input UVLO Efficiency and Power Loss Product Package 1
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Documentation

Data Sheet 1

Reliability Data 1

User Guide 1

Design Note 1

Technical Articles 1

Data Sheet

This is the most up-to-date revision of the Data Sheet.

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Software Resources

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Hardware Ecosystem

Parts Product Life Cycle Description
Circuit Monitors 1
LTC2960
RECOMMENDED FOR NEW DESIGNS 36V Nano-Current Two-Input Voltage Monitor
Protection Switches & Controllers 2
LTC4359
RECOMMENDED FOR NEW DESIGNS Ideal Diode Controller with Reverse Input Protection
LT4363
RECOMMENDED FOR NEW DESIGNS High Voltage Surge Stopper with Current Limit
Switching Regulators & Controllers 1
LTC3880
RECOMMENDED FOR NEW DESIGNS Dual Output PolyPhase Step-Down DC/DC Controller with Digital Power System Management
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Tools & Simulations

LTspice 2

Models for the following parts are available in LTspice:

  • LT3800
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LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.

Evaluation Kits

eval board
schematic 1
DC720A

LT3800EFE Demo Board | VIN = 20V to 55V, VOUT = 12V @ 6.25A

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Product Details

Demonstration Circuit 720 is a 200kHz high voltage, synchronous current-mode DC/DC step-down converter featuring the LT3800. The board operates from a Vin range of 20V –to 55V and outputs 12V @ 6.25A (75W).
DC720A
LT3800EFE Demo Board | VIN = 20V to 55V, VOUT = 12V @ 6.25A
DC720A - Schematic

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