LT3502AIDC#TRPBF

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1. Description

The LT3502AIDC#TRPBF are current mode PWM step-down DC/DC converters with an internal 500mA power switch, in tiny 8-lead 2mm × 2mm DFN and 10-lead MS10 packages. The wide input voltage range of 3V to 40V makes the LT3502/LT3502A suitable for regulating power from a wide variety of sources, including 24V industrial  supplies and automotive batteries. Its high operating frequency allows the use of tiny, low cost inductors and capacitors, resulting in a very small solution. Constant frequency above the AM band avoids interfering with radio reception, making the LT3502AIDC#TRPBF particularly suitable for automotive applications. Cycle-by-cycle current limit and frequency foldback provide protection against shorted outputs. Soft-start and frequency foldback eliminates input current surge during start-up. DA current sense provides further protection in fault conditions. An internal boost diode reduces component count.

2. Features

    1. 3V to 40V Input Voltage Range

    2. 500mA Output Current

    3. Switching Frequency: 2.2MHz (LT3502A), 1.1MHz (LT3502)

    4. 800mV Feedback Voltage

    5. Short-Circuit Robust

    6. Soft-Start

    7. Low Shutdown Current: <2µA

    8. Internally Compensated

    9. Internal Boost Diode

  10. Thermally Enhanced 2mm × 2mm 8-Lead DFN and 10-Lead MS10 Package

3. Applications

    1. Automotive Systems

    2. Battery-Powered Equipment

    3. Wall Transformer Regulation

    4. Distributed Supply Regulation