LT3958

PRODUCTION

High Input Voltage, Boost, Flyback, SEPIC and Inverting Converter

Data Sheet Product Selection Table
Part Models
4
1ku List Price
Starting From $3.66
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Part Details

  • Wide Input Voltage Range: 5V to 80V
  • Single Feedback Pin for Positive or Negative Output Voltage
  • Internal 3.3A/84V Power Switch
  • Current Mode Control Provides Excellent Transient Response
  • Programmable Operating Frequency (100kHz to 1MHz) with One External Resistor
  • Synchronizeable to an External Clock
  • Low Shutdown Current < 1μA
  • Internal 7.2V Low Dropout Voltage Regulator
  • Programmable Input Undervoltage Lockout with Hysteresis
  • Programmable Soft-Start
  • Thermally Enhanced QFN (5mm × 6mm) Package
LT3958
High Input Voltage, Boost, Flyback, SEPIC and Inverting Converter
High Efficiency Boost Converter High Efficiency Boost Converter Product Package 1
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Documentation

Data Sheet 1

Reliability Data 1

User Guide 1

Technical Articles 1

Data Sheet

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

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Hardware Ecosystem

Parts Product Life Cycle Description
Surge Stopper, Overvoltage, and Overcurrent Protection 1
LT4363
RECOMMENDED FOR NEW DESIGNS High Voltage Surge Stopper with Current Limit
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Tools & Simulations

LTspice 2

Models for the following parts are available in LTspice:

  • LT3958
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
DC1569A

LT3958EUHE Boost Demo Board | 11V-40VIN; VOUT = 48V @ 0.5A

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Product Details

Demonstration circuit 1569A is a High Voltage Monolithic Boost Converter featuring the LT3958. The LT3958 can be configured as a boost, flyback, SEPIC, and inverting converter, but the demonstration circuit is assembled as a boost. The input voltage range is 11V to 40V and the output voltage is 48V with 500mA over the entire input voltage range. The LT3958 has an internal n-channel 3.3A, 84V power switch for high voltage, power, and efficiency. The dual paddle package provides excellent heat dissipation for the internal power switch. The LT3958 current-mode dc/dc converter features adjustable switching frequency, soft-start, compensation, shutdown and undervoltage lockout with hysteresis, and a feedback pin (FBX) that can be used in both positive and negative applications. A SYNC input can be used to synchronize the switching at a frequency higher than the IC is programmed.
DC1569A
LT3958EUHE Boost Demo Board | 11V-40VIN; VOUT = 48V @ 0.5A
DC1569 Evaluation Board DC1569 Evaluation Board - Top View DC1569A Evaluation Board - Bottom View DC1569A - Schematic

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