MIC24045 click

MIC24045 click carries MIC24045 I2C-programmable, high-efficiency, wide input range, 5A synchronous step-down regulator from Microchip. The click is designed to run on either 3.3V or 5V power supply. It communicates with the target microcontroller over I2C interface with additional functionality provided by the following pins on the mikroBUS™ line: RST, INT.

MIC24045 regulator features

The MIC24045 is a digitally programmable, 5A valley current-mode controlled regulator featuring an input voltage range from 4.5V to 19V.

The MIC24045 is perfectly suited for multiple voltage rail application environments, typically found in computing and telecommunication systems.

Thermal Warning and Thermal Shutdown

The MIC24045 has a thermal shutdown protection that prevents operation at excessive temperature. The thermal shutdown threshold is typically set at +160°C with a hysteresis of +25°C.

The MIC24045 features a Thermal Warning flag that is readable through the I2C interface (register polling is needed). The Thermal Warning flag signals the approaching of thermal shutdown, so that appropriate system-level countermeasures can be undertaken.

How it works

The click is designed to lower the voltage on the input from 4.5V-19V to 0.64V-5.25V. The same voltage is used for powering the MCP24045 IC (TB1 and TB2 connectors).

The voltage on the mikroBUS™ I2C pin can be either 3.3V or 5V, depending on the jumper position. The selected mikroBUS™ power supply is used only for the pull-ups on I2C lines.

Specifications

Pinout diagram

This table shows how the pinout on MIC24045 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
Precision Enable Input Pin	ENABLE	2	RST	INT	15	PG	Power Good Open-Drain Output Pin
	NC	3	CS	TX	14	NC
	NC	4	SCK	RX	13	NC
	NC	5	MISO	SCL	12	I2C SCL	I2C Clock Input Pin
	NC	6	MOSI	SDA	11	I2C SDA	I2C Data Input/Output Pin
Power supply	+3.3V	7	3.3V	5V	10	+5V	Power supply
Ground	GND	8	GND	GND	9	GND	Ground

Maximum ratings

Programming

Code examples for MIC24045 click, written for MikroElektronika hardware and compilers are available on Libstock.

Code snippet

The following code snippet calls initialization functions, and then slowly decrements the voltage from maximum value down to the minimum.

01 void main()
02 {
03    system_init();
04    mic_24045_init(0x50);
05    Delay_ms (100);
06    i = 21;
07    while (i)
08    {
09            write_1 = i*0.25;
10            mic_24045_write_vout (write_1);
11            GPIOC_ODR = 0x04;        /* Sets EN pin to 1 */
12            Delay_ms (1000);
13            
14            read_2 = mic_24045_read_vout ();
15            FloatToStr (read_2, &uart_text);
16            
17            if (read_2 > 1)
18               uart_text [5] = 0;
19            
20            UART_Write_Text ("rn");
21            UART_Write_Text (uart_text);
22 
23         GPIOC_ODR = 0x00;
24            Delay_ms (1000);
25         i--;
26    }
27 }