LT3759

PRODUCTION

Wide Input Voltage Range Boost/SEPIC/Inverting Controller

Data Sheet Product Selection Table
Part Models
6
1ku List Price
Starting From $2.84
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Part Details

  • Wide VIN Range: 1.6V to 42V
  • Positive or Negative Output Voltage Programming with a Single Feedback Pin
  • PGOOD Output Voltage Status Report
  • Accurate 50mV SENSE Threshold Voltage
  • Programmable Soft-Start
  • Programmable Operating Frequency (100kHz to 1MHz) with One External Resistor
  • Synchronizable to an External Clock
  • Low Shutdown Current < 1μA
  • INTVCC Regulator Supplied from VIN or DRIVE
  • Programmable Input Undervoltage Lockout with Hysteresis
LT3759
Wide Input Voltage Range Boost/SEPIC/Inverting Controller
2.5V to 36V Input, 12V Output SEPIC Converter Excellent for Automotive 12V Post Regulator Efficiency vs Output Current Product Package 1
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Documentation

Data Sheet 1

Reliability Data 1

User Guide 2

Design Note 1

Technical Articles 2

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
Silicon Oscillators 1
LTC6908
Resistor Set SOT-23 Oscillator with Spread Spectrum Modulation
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Tools & Simulations

LTspice 5

Models for the following parts are available in LTspice:

  • LT3759
LTspice

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
schematic 2
schematic 3
schematic 4
schematic 5
DC1725A

LT3759EMSE Boost Demo Board | VIN = 1.8V to 4.5V, VOUT = 5V @ 2A

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Product Details

Demonstration circuit 1725A features LT3759 in a 485kHz boost converter, designed for a 5V/2A output from a 1.8V to 4.5V input. The LT3759 is a current mode DC/DC Boost/SEPIC/Inverting controller operating over an input range of 1.6V to 42V. Thanks to a novel FBX pin architecture, the LT3759 allows both positive and negative output feedback voltages.

eval board
schematic 6
schematic 7
schematic 8
schematic 9
DC1787A

LT3759EMSE SEPIC Demo Board | VIN = 2.8V to 36V, VOUT = 12V @ 1A

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Product Details

Demonstration circuit 1787A is a wide input voltage range SEPIC converter featuring the LT3759 controller. It converts a 2.8V~36V input to a 12V output, with 1A load current capability for VIN ≥ 4V. The converter operates at a 300 kHz nominal switching frequency, with 91% peak efficiency. The DC1787A can be easily modified to generate other output voltages, and can also be optimized for efficiency and size with narrower input voltage ranges.
DC1725A
LT3759EMSE Boost Demo Board | VIN = 1.8V to 4.5V, VOUT = 5V @ 2A
DC1725A Demo Board DC1725A Demo Board DC1725A Demo Board DC1725A Demo Board DC1725A - Schematic
DC1787A
LT3759EMSE SEPIC Demo Board | VIN = 2.8V to 36V, VOUT = 12V @ 1A
DC1787A Evaluation Board DC1787A Evaluation Board - Top View DC1787A Evaluation Board - Bottom View DC1787A - Schematic

Latest Discussions

2 Years Ago
RE: LT3759 SEPIC Bode plot using LTpowerCAD
3 Years Ago
SEPIC current control
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