Buck 23 Click

Buck 23 Click is a compact add-on board with a DC-DC power converter that steps down the voltage from its input to its output. This board features the MAX20010C, a fully-integrated, high-efficiency, synchronous, step-down converter from Analog Devices. The MAX20010C achieves 6A continuous output current over a wide input supply range from 3V to 5.5V. It offers ±2% output voltage accuracy and can operate efficiently over interface-configurable output voltage load range from 0.5V to 1.58V. The MAX20010C also offers programmable soft-start, overcurrent, and overtemperature protections.

Click Product page

Click library

• Author : Stefan Filipovic
• Date : Jan 2023.
• Type : I2C type

Software Support

We provide a library for the Buck 23 Click as well as a demo application (example), developed using MikroElektronika compilers. The demo can run on all the main MikroElektronika development boards.

Package can be downloaded/installed directly from NECTO Studio Package Manager(recommended way), downloaded from our LibStock™ or found on Mikroe github account.

Library Description

This library contains API for Buck 23 Click driver.

Standard key functions :

• buck23_cfg_setup Config Object Initialization function.

  void buck23_cfg_setup ( buck23_cfg_t *cfg );

• buck23_init Initialization function.

  err_t buck23_init ( buck23_t *ctx, buck23_cfg_t *cfg );

• buck23_default_cfg Click Default Configuration function.

  err_t buck23_default_cfg ( buck23_t *ctx );

Example key functions :

• buck23_set_vstep This function sets the voltage output step to 10mV or 12.5mV.

  err_t buck23_set_vstep ( buck23_t *ctx, uint8_t vstep );

• buck23_set_vout This function sets the voltage output.

  err_t buck23_set_vout ( buck23_t *ctx, uint16_t vout_mv );

• buck23_get_pg_pin This function returns the PG (power good) pin logic state.

  uint8_t buck23_get_pg_pin ( buck23_t *ctx );

Example Description

This example demonstrates the use of Buck 23 Click by changing the output voltage.

The demo application is composed of two sections :

Application Init

Initializes the driver and performs the device default configuration.

void application_init ( void )
{
    log_cfg_t log_cfg;  /**< Logger config object. */
    buck23_cfg_t buck23_cfg;  /**< Click config object. */

    /** 
     * Logger initialization.
     * Default baud rate: 115200
     * Default log level: LOG_LEVEL_DEBUG
     * @note If USB_UART_RX and USB_UART_TX 
     * are defined as HAL_PIN_NC, you will 
     * need to define them manually for log to work. 
     * See @b LOG_MAP_USB_UART macro definition for detailed explanation.
     */
    LOG_MAP_USB_UART( log_cfg );
    log_init( &logger, &log_cfg );
    log_info( &logger, " Application Init " );

    // Click initialization.
    buck23_cfg_setup( &buck23_cfg );
    BUCK23_MAP_MIKROBUS( buck23_cfg, MIKROBUS_1 );
    if ( I2C_MASTER_ERROR == buck23_init( &buck23, &buck23_cfg ) ) 
    {
        log_error( &logger, " Communication init." );
        for ( ; ; );
    }

    if ( BUCK23_ERROR == buck23_default_cfg ( &buck23 ) )
    {
        log_error( &logger, " Default configuration." );
        for ( ; ; );
    }

    log_info( &logger, " Application Task " );
}

Application Task

Changes the output voltage once per second and displays on the USB UART the currently set voltage output value as well as its range and resolution. It also checks and displays the status register content and the power good pin indication.

void application_task ( void )
{
    uint16_t vout_mv;
    uint8_t status;
    if ( BUCK23_OK == buck23_set_vstep ( &buck23, BUCK23_VSTEP_10 ) )
    {
        log_printf ( &logger, " ------------------------------------\r\n" );
        log_printf ( &logger, " VOUT resolution: 10mV\r\n VOUT range: 500mV to 1270mV\r\n" );
        log_printf ( &logger, " ------------------------------------" );
    }
    for ( vout_mv = BUCK23_VOUT_MIN_VSTEP_10; vout_mv <= BUCK23_VOUT_MAX_VSTEP_10; vout_mv += 50 )
    {
        if ( BUCK23_OK == buck23_read_register ( &buck23, BUCK23_REG_STATUS, &status ) )
        {
            log_printf ( &logger, "\r\n STATUS: 0x%.2X\r\n", ( uint16_t ) status );
        }
        if ( BUCK23_OK == buck23_set_vout ( &buck23, vout_mv ) )
        {
            log_printf ( &logger, " VOUT: %u mV\r\n", vout_mv );
        }
        if ( !buck23_get_pg_pin ( &buck23 ) )
        {
            log_printf ( &logger, " ERROR: No power good\r\n" );
            log_printf ( &logger, " Restarting device\r\n" );
            buck23_restart_device ( &buck23 );
            vout_mv -= 50;
        }
        Delay_ms ( 1000 );
    }
    if ( BUCK23_OK == buck23_set_vstep ( &buck23, BUCK23_VSTEP_12_5 ) )
    {
        log_printf ( &logger, " ------------------------------------\r\n" );
        log_printf ( &logger, " VOUT resolution: 12.5mV\r\n VOUT range: 625mV to 1587.5mV\r\n" );
        log_printf ( &logger, " ------------------------------------" );
    }
    for ( vout_mv = BUCK23_VOUT_MIN_VSTEP_12_5; vout_mv <= BUCK23_VOUT_MAX_VSTEP_12_5; vout_mv += 50 )
    {
        if ( BUCK23_OK == buck23_read_register ( &buck23, BUCK23_REG_STATUS, &status ) )
        {
            log_printf ( &logger, "\r\n STATUS: 0x%.2X\r\n", ( uint16_t ) status );
        }
        if ( BUCK23_OK == buck23_set_vout ( &buck23, vout_mv ) )
        {
            log_printf ( &logger, " VOUT: %u mV\r\n", vout_mv );
        }
        if ( !buck23_get_pg_pin ( &buck23 ) )
        {
            log_printf ( &logger, " ERROR: No power good\r\n" );
            log_printf ( &logger, " Restarting device\r\n" );
            buck23_restart_device ( &buck23 );
            vout_mv -= 50;
        }
        Delay_ms ( 1000 );
    }
}

The full application code, and ready to use projects can be installed directly from NECTO Studio Package Manager(recommended way), downloaded from our LibStock™ or found on Mikroe github account.

Other Mikroe Libraries used in the example:

• MikroSDK.Board
• MikroSDK.Log
• Click.Buck23

Additional notes and informations

Depending on the development board you are using, you may need USB UART Click, USB UART 2 Click or RS232 Click to connect to your PC, for development systems with no UART to USB interface available on the board. UART terminal is available in all MikroElektronika compilers.