LTM8068

RECOMMENDED FOR NEW DESIGNS

3VIN to 40VIN Isolated μModule DC/DC Converter with LDO Post Regulator

Data Sheet (Rev. D) Product Selection Table
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Overview

  • 2kVAC Isolated μModule Converter
  • UL60950 Recognized File E464570
  • Wide Input Voltage Range: 3V to 40V
  • VOUT1 Output:
    • Up to 450mA (VIN = 24V, VOUT1 = 5V)
    • 2.5V to 18V Output Range
  • VOUT2 Low Noise Linear Post Regulator:
    • Up to 300mA
    • 1.2V to 18V Output Range
  • Current Mode Control
  • Programmable Soft-Start
  • User Configurable Undervoltage Lockout
  • Low Profile (9mm × 11.25mm × 4.92mm) BGA Package

The LTM8068 is a 2kV AC isolated flyback μModule® (power module) DC/DC converter with LDO post regulator. Included in the package are the switching controller, power switches, transformer, LDO, and all support components. Operating over an input voltage range of 2.8V to 40V, the LTM8068 supports an output voltage range of 2.5V to 18V, set by a single resistor. There is also a linear post regulator whose output voltage is adjustable from 1.2V to 18V as set by a single resistor. Only output and input capacitors are needed to finish the design.

The LTM8068 is packaged in a thermally enhanced, compact (9mm × 11.25mm × 4.92mm) overmolded ball grid array (BGA) package suitable for automated assembly by standard surface mount equipment. The LTM8068 is available with SnPb or RoHS compliant terminal finish.

Applications

  • Industrial Sensors
  • Industrial Switches
  • Ground Loop Mitigation
LTM8068
3VIN to 40VIN Isolated μModule DC/DC Converter with LDO Post Regulator
LTM8068 Application Circuit LTM8068 Pin Configuration
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Documentation

Data Sheet 1

Reliability Data 1

User Guide 1

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Software Resources

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Hardware Ecosystem

Parts Product Life Cycle Description
LTM8067
RECOMMENDED FOR NEW DESIGNS 3VIN to 40VIN Isolated μModule DC/DC Converter
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Tools & Simulations

LTspice 1

Models for the following parts are available in LTspice:

  • LTM8068
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

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schematic 1
schematic 2
schematic 3
schematic 4
schematic 5
DC2358A

LTM8068 Demo Board | 2kV AC Isolated μModule Flyback with LDO, 4.5V ≤ VIN ≤ 40V, VOUT1 = 5.6V @ up to 460mA, VOUT2 = 5V Post-Regulator LDO

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Product Details

The Demo Circuit 2358A is a 2kV AC isolated flyback μModule® DC/DC converter with LDO post regulator featuring the LTM8068. The demo circuit is designed for a 5.6V flyback output and a 5V post regulator output from a 4.5V to 40V input. The current capability of the 5.6V flyback output (VOUT1) varies with input voltage from about 200mA at 4.5VIN to about 460mA at 40VIN. The current capability of the 5V LDO output (VOUT2) is limited by either the VOUT1 loading or the 300mA current limit on the LDO post regulator itself. Figure 1 in the demo manual shows the maximum output current on VOUT1 when VOUT2 is not loaded, and VOUT2 when VOUT1 is unloaded.
DC2358A
LTM8068 Demo Board | 2kV AC Isolated μModule Flyback with LDO, 4.5V ≤ VIN ≤ 40V, VOUT1 = 5.6V @ up to 460mA, VOUT2 = 5V Post-Regulator LDO
DC2358A Demo Board DC2358A Demo Board DC2358A Demo Board DC2358A Demo Board DC2358A - Schematic

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