LM536025QPWPTQ1 Integrated Circuits (ICs)

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1. Describe

The LM53603-Q1, LM536025QPWPTQ1 buck regulators are designed for automotive applications and provide 5 V or 3.3 V output voltage (with ADJ option) at 3 A or 2 A from input voltage up to 36 V. Advanced high speed The circuit allows the device to be regulated from an input of up to 20 V, while providing an output of 5 V at a switching frequency of 2.1 MHz. The innovative architecture allows the device to regulate a 3.3 V output from an input voltage of only 3.5 V. All aspects of this product are optimized for automotive customers. Input voltage range up to 36 V and transient tolerance up to 42 V simplify input surge protection design. An open-drain reset output, with filtering and delay, provides a true indication of system status. This feature negates the requirement for additional oversight components, saving cost and board space. Seamless transition between PWM and PFM modes and a no-load operating current of only 24 µA ensures high efficiency and excellent transient response load.

2. Feature

    1. The LM53603-Q1, LM53602-Q1 are available as AEC-Q1 qualified automotive grade products with the following results:

        – Device Temperature Grade 1: -40°C to +125°C ambient operating range

        – Device HBM ESD classification level 1C

        – Equipment CDM ESD classification level C4B

    2. 3 A or 2 A maximum load current

    3. Input voltage range from 3.5 V to 36 V: transient to 42 V

    4. Output voltage options: 5 V, 3.3 V, ADJ

    5. 2.1 MHz fixed switching frequency

    6. ±2% output voltage tolerance

    7. –40°C to 150°C Junction Temperature Range

    8. 1.7 µA Shutdown Current (typ)

    9. 24 µA no-load input supply current (typ)

  10. 5 V or 3.3 V output requires no external feedback divider

  11. Reset output with filter and delay

  12. Auto light load mode for increased efficiency

  13. User selectable forced PWM mode (FPWM)

  14. Built-in loop compensation, soft-start, current limit, thermal shutdown, UVLO and external frequency synchronization

  15. Thermally enhanced 16-pin package: 5 mm x 4.4 mm x 1 mm

3. Application

    1. Navigation/GPS

    2. dash board

    3. ADAS, infotainment, HUD

4. Pin configuration

5. Pin Description

6. Application Information

The LM53603-Q1 and LM536025QPWPTQ1 are step-down DC-DC converters typically used to convert higher DC voltages to lower DC voltages with a maximum output current of 3 A or 2 A. Components can be selected for the LM53603-Q1 or LM536025QPWPTQ1 using the following design procedure. Alternatively, the WEBENCH® design tool can be used to generate a complete design. The tool utilizes an iterative design process and provides access to a comprehensive component database. This allows the tool to create optimized designs and allows users to experiment with various design options.