stepdown3  2.0.0.0
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Step Down 3 Click

Step Down 3 Click is a compact add-on board that steps down the voltage from its input to its output. This board features the ST1PS03, a nano-quiescent miniaturized synchronous step-down converter with a load switch from STMicroelectronics. The ST1PS03 can provide up to 400mA output current with an input voltage ranging from 1.8V to 5.5V, specifically designed for applications where high efficiency is crucial. It also embeds a controlled switch accessible from auxiliary channel input to supply a subsystem, output voltage from 1.6V to 3.3V set using three digital control inputs, and a Power Good signal to indicate stabilized output voltages.

Click Product page


Click library

  • Author : Stefan Filipovic
  • Date : Apr 2022.
  • Type : GPIO type

Software Support

We provide a library for the Step Down 3 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 Step Down 3 Click driver.

Standard key functions :

Example key functions :

Example Description

This example demonstrates the use of Step Down 3 Click board by iterating through the entire output voltage range.

The demo application is composed of two sections :

Application Init

Initializes the driver and logger, then enables the Click board and disables the auxiliary output.

void application_init ( void )
{
log_cfg_t log_cfg;
stepdown3_cfg_t stepdown3_cfg;
LOG_MAP_USB_UART( log_cfg );
log_init( &logger, &log_cfg );
log_info( &logger, " Application Init " );
// Click initialization.
stepdown3_cfg_setup( &stepdown3_cfg );
STEPDOWN3_MAP_MIKROBUS( stepdown3_cfg, MIKROBUS_1 );
if ( DIGITAL_OUT_UNSUPPORTED_PIN == stepdown3_init( &stepdown3, &stepdown3_cfg ) )
{
log_error( &logger, " Communication init." );
for ( ; ; );
}
stepdown3_enable_device ( &stepdown3 );
log_info( &logger, " Application Task " );
}

Application Task

Changes the output voltage every 3 seconds and displays the set voltage output value on the USB UART.

void application_task ( void )
{
static uint8_t vout = STEPDOWN3_OUT_VOLTAGE_1V6;
stepdown3_set_output_voltage ( &stepdown3, vout );
switch ( vout )
{
{
log_printf( &logger, " Output voltage: 1.6 V\r\n\n" );
break;
}
{
log_printf( &logger, " Output voltage: 1.8 V\r\n\n" );
break;
}
{
log_printf( &logger, " Output voltage: 2.1 V\r\n\n" );
break;
}
{
log_printf( &logger, " Output voltage: 2.5 V\r\n\n" );
break;
}
{
log_printf( &logger, " Output voltage: 2.7 V\r\n\n" );
break;
}
{
log_printf( &logger, " Output voltage: 2.8 V\r\n\n" );
break;
}
{
log_printf( &logger, " Output voltage: 3.0 V\r\n\n" );
break;
}
{
log_printf( &logger, " Output voltage: 3.3 V\r\n\n" );
break;
}
}
if ( ++vout > STEPDOWN3_OUT_VOLTAGE_3V3 )
{
}
Delay_ms ( 1000 );
Delay_ms ( 1000 );
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.StepDown3

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.


stepdown3_cfg_setup
void stepdown3_cfg_setup(stepdown3_cfg_t *cfg)
Step Down 3 configuration object setup function.
stepdown3_enable_aux_output
void stepdown3_enable_aux_output(stepdown3_t *ctx)
Step Down 3 enable aux output function.
stepdown3_t
Step Down 3 Click context object.
Definition: stepdown3.h:112
STEPDOWN3_OUT_VOLTAGE_2V7
#define STEPDOWN3_OUT_VOLTAGE_2V7
Definition: stepdown3.h:76
STEPDOWN3_OUT_VOLTAGE_3V0
#define STEPDOWN3_OUT_VOLTAGE_3V0
Definition: stepdown3.h:78
STEPDOWN3_OUT_VOLTAGE_2V8
#define STEPDOWN3_OUT_VOLTAGE_2V8
Definition: stepdown3.h:77
stepdown3_set_output_voltage
void stepdown3_set_output_voltage(stepdown3_t *ctx, uint8_t vout)
Step Down 3 set output voltage function.
STEPDOWN3_OUT_VOLTAGE_3V3
#define STEPDOWN3_OUT_VOLTAGE_3V3
Definition: stepdown3.h:79
application_task
void application_task(void)
Definition: main.c:63
stepdown3_enable_device
void stepdown3_enable_device(stepdown3_t *ctx)
Step Down 3 enable device function.
stepdown3_disable_aux_output
void stepdown3_disable_aux_output(stepdown3_t *ctx)
Step Down 3 disable aux output function.
stepdown3_cfg_t
Step Down 3 Click configuration object.
Definition: stepdown3.h:126
STEPDOWN3_OUT_VOLTAGE_1V6
#define STEPDOWN3_OUT_VOLTAGE_1V6
Step Down 3 output voltage selection.
Definition: stepdown3.h:72
STEPDOWN3_MAP_MIKROBUS
#define STEPDOWN3_MAP_MIKROBUS(cfg, mikrobus)
MikroBUS pin mapping.
Definition: stepdown3.h:97
STEPDOWN3_OUT_VOLTAGE_2V5
#define STEPDOWN3_OUT_VOLTAGE_2V5
Definition: stepdown3.h:75
STEPDOWN3_OUT_VOLTAGE_2V1
#define STEPDOWN3_OUT_VOLTAGE_2V1
Definition: stepdown3.h:74
STEPDOWN3_OUT_VOLTAGE_1V8
#define STEPDOWN3_OUT_VOLTAGE_1V8
Definition: stepdown3.h:73
application_init
void application_init(void)
Definition: main.c:30
stepdown3_init
err_t stepdown3_init(stepdown3_t *ctx, stepdown3_cfg_t *cfg)
Step Down 3 initialization function.