LM536013QDSXRQ1

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1. Describe

LM53600-Q1 and LM536013QDSXRQ1 synchronization Buck Regulator Devices Optimized for Automotive applications, providing output voltages of 5 V, 3.3 V, or adjustable output. Load current up to 650 mA supported by the LM53600-Q1, while the LM53601- Q1 supports up to 1000 mA. advanced high speed circuit allows the LM53600-Q1 and LM53601-Q1 Device regulated from 18 V input to output 3.3 V at a fixed frequency of 2.1 MHz. innovative architecture allows the device to regulate a 3.3-V Output from an input voltage of only 3.8 V. enter Voltage range up to 36 V with transient tolerance of Up to 42 V, simplifying input surge protection design. One Open-drain reset output with filtering and delay Published to provide a real indication of the state of the system. This feature negates the additional requirement Monitor components, saving cost and board space. Seamless transition between PWM and PFM modes, Together with a quiescent current of only 23 µA, ensuring High Efficiency and Excellent Transient Response load. Requires few external components, allowing Generation of compact PCB layouts. Although Q1 ratings for LM53600-Q1 and LM53601-Q1 devices, Electrical characteristics ensure that across the junction The temperature range is –40°C to 150°C.

2. Feature

    1. Compliant with automotive application requirements

    2. AEC-Q100 qualified with the following results:

        – Device Temperature Grade 1: –40°C to 125°C Ambient operating temperature range

        – Device HBM classification level 2

        – Equipment CDM classification level C5

    3. –40°C to 150°C junction temperature range (available)

    4. Wide operating input voltage: 3.55 V to 36 V (transient to 42 V)

    5. Spread spectrum option available

    6. 2.1MHz fixed switching frequency

    7. Low quiescent current: 23 μA

    8. Shutdown current: 1.8 µA

    9. Adjustable 3.3V or 5V output

  10. Maximum current load: 650 mA for LM53600-Q1, 1000 mA for LM53601-Q1

  11. Pin selectable forced PWM mode

  12. RESET output with filter and delayed release

  13. External frequency synchronization

  14. Internal compensation, soft-start, current limit and UVLO

  15. 10-lead, 3-mm × 3-mm SON package with wettable and non-wettable sides

3. Pin configuration

4. Pin Description

5. Application

    1. Automotive camera applications

    2. Car driver assistance systems

    3. Automotive body applications

6. Feature Description

    1. Soft-Start Function

        Soft-start time is fixed internally at about 3.0 ms. Soft-start is achieved by ramping the internal reference. The LM53600-Q1 and LM53601-Q1 devices operate correctly even if there is a voltage present on output before activation of the LM53600-Q1 or LM53601-Q1.

    2. Current Limit

        The LM53600-Q1 and LM53601-Q1 devices use two current limits which allow the use of smaller inductors than systems utilizing a single current limit. A coarse high side or peak current limit is provided to protect against faults and saturated inductors. High side current limit limits the duration of high sides FET's on period during a given clock cycle. A precision valley current limit prevents excessive average output current from the Buck converter of the LM53600-Q1 and LM53601-Q1 devices. A new switching cycle is not initiated until inductor current drops below the valley current limit. This scheme allows use of inductors with saturation current rated less than twice the rated operating current of the LM53600-Q1 or LM53601-Q1.

    3. Hiccup Mode

        In order to prevent excessive heating and power consumption under sustained short circuit conditions, a hiccup mode is included. If an over current condition is maintained, the LM53600-Q1 or LM53601-Q1 device shuts off its output and waits for tW (approximately 4.5 ms), after which the LM53600-Q1 or LM53601-Q1 restarts operation beginning by activating soft start.

7. Application Information

The LM53600-Q1 and LM53601-Q1 are step-down DC-DC converters typically used to convert higher DC voltages to lower DC voltages with a maximum output current of 1A or 650mA. The following design procedure can be used to select components for the LM53600-Q1 or LM53601-Q1. 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.