40V, 200mA Micropower Step-Down DC/DC with TJ(MAX) = 150°C

Apr 23 2007 - MILPITAS, CA
  • Linear Technology announces the H-grade version of the LT3470. The LT3470 is a 40V micropower step-down DC/DC converter with integrated boost and catch diodes in a 2mm × 3mm DFN package. It operates from input voltages of 4V to 40V, delivering up to 200mA of output current. The LT3470 is optimized for 2-cell Li-Ion, wall adapter or automotive power sources. Burst Mode® operation reduces quiescent current to only 26uA, making it ideal for applications such as always-on automotive systems. The entire solution footprint is only 50mm2, making it ideal for space constrained applications.

    The H-grade version operates up to a junction temperature of 150°C, compared to the E- and I-grade maximum junction temperature of 125°C. All electrical specifications are identical for the E-, I- and H-grade versions. The H- grade parts are both tested and guaranteed to the maximum junction temperature of 150°C. They are well suited for automotive and industrial applications, which are subjected to high ambient temperatures.

    The LT3470HDDB is available from stock in a 2mm × 3mm DFN-8 package. Pricing starts at $3.07 each for 1,000 piece quantities.

    Summary of Features: LT3470H

    • Low Quiescent Current: 26uA at 12VIN to 3.3VOUT
    • Integrated Boost and Catch Diodes
    • Input Range: 4V to 40V
    • Low Output Ripple: <10mV
    • 200mA Output Current
    • Hysteretic Mode Control
      • Low Ripple Burst Mode® Operation at Light Loads
      • Continuous Operation at Higher Loads
    • Solution Size as Small as 50mm2
    • 8-pin 2mm × 3mm DFN Package

    40V, 200mA Step-Down DC/DC Converter w/ TJMAX = 150°C


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