Smart Buck 2 Click

How does it work?

Smart Buck 2 Click is based on the TPS62363, a 3A processor supply with remote sense from Texas Instruments. The converter has a programable output voltage for digital voltage scaling in a range of 0.5V up to 1.77V in 10mV steps. It is focused on high-output voltage accuracy and features soft start, programmable slew rate at voltage transition, overtemperature protection, input undervoltage detection and lockout, differential load sensing, DCS-Control™ architecture for fast and precise transient regulation, and more. Also, it offers a high-efficiency step-down conversion, where the area of highest efficiency is towards low currents while the processor is operating in retention mode, as well as towards the highest output currents, increasing the battery ON time.

The TPS62363 converter features a power save mode to gain efficiency at light output current conditions. The device automatically transitions in both directions between pulse width modulation (PWM) operation at high load and pulse frequency modulation (PFM) operation at light load current. This maintains high efficiency at both light and heavy load currents. In PFM Mode, the device generates single switching pulses when required to maintain the programmed output voltage.

Smart Buck 2 Click uses a standard 2-wire I2C interface to communicate with the host MCU. The TPS62363 supports Standard, Fast, and High-Speed modes with a clock frequency of up to 3.4MHz.

This Click board™ can be operated only with a 3.3V logic voltage level. The board must perform appropriate logic voltage level conversion before using MCUs with different logic levels. Also, this Click board™ comes equipped with a library containing easy-to-use functions and an example code that can be used as a reference for further development.

Specifications

Pinout diagram

This table shows how the pinout on Smart Buck 2 Click corresponds to the pinout on the mikroBUS™ socket (the latter shown in the two middle columns).

Notes	Pin					Pin	Notes
	NC	1	AN	PWM	16	NC
	NC	2	RST	INT	15	NC
ID COMM	CS	3	CS	RX	14	NC
	NC	4	SCK	TX	13	NC
	NC	5	MISO	SCL	12	SCL	I2C Clock
	NC	6	MOSI	SDA	11	SDA	I2C Data
Power Supply	3.3V	7	3.3V	5V	10	NC
Ground	GND	8	GND	GND	9	GND	Ground

Onboard settings and indicators

Smart Buck 2 Click electrical specifications

Software Support

We provide a library for the Smart Buck 2 Click as well as a demo application (example), developed using MIKROE compilers. The demo can run on all the main MIKROE development boards.

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

Library Description

This library contains API for Smart Buck 2 Click driver.

Key functions

• smartbuck2_set_voltage Smart Buck 2 set voltage function.

• smartbuck2_get_voltage Smart Buck 2 get voltage function.

Example Description

This library contains API for the Smart Buck 2 Click board™. This driver provides functions for device configurations and for the sets and reads the output voltage.

void application_task ( void )  
 { 
     if ( SMARTBUCK2_OK == smartbuck2_set_voltage( &smartbuck2, vout_mv ) ) 
     { 
         Delay_ms( 100 ); 
         if ( SMARTBUCK2_OK == smartbuck2_get_voltage( &smartbuck2, &vout_mv ) ) 
         { 
             log_printf( &logger, " Output voltage: %u [mV]rn", vout_mv ); 
         } 
     } 
     vout_mv += DEMO_VOUT_STEP_100MV; 
     if ( vout_mv > SMARTBUCK2_VOUT_MAX ) 
     { 
         vout_mv = SMARTBUCK2_VOUT_MIN; 
     } 
     Delay_ms( 3000 ); 
 }

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

Other Mikroe Libraries used in the example:

• MikroSDK.Board
• MikroSDK.Log
• Click.SmartBuck2

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 MIKROE compilers.

mikroSDK

This Click board™ is supported with mikroSDK – MIKROE Software Development Kit. To ensure proper operation of mikroSDK compliant Click board™ demo applications, mikroSDK should be downloaded from the LibStock and installed for the compiler you are using.

For more information about mikroSDK, visit the official page.