MIKROE-2835 Datasheet MIKROE-2835 | P1-P3



MIC24055 click

PID: MIKROE-2835

Weight: 35 g

MIC24055 click is the buck regulator that can deliver continuous output current up to 8A and

can step down voltages from up to 19V which makes this click board easy to use with many

power sources commonly available. The amount of current it can deliver and the steady, ripple-

free regulated voltage, make this click board a perfect choice for powering up devices which

require high current, regulated power supply, such as servers and workstations, routers, telecom

equipment and every other electronic device with similar power demands.

MIC24055 click is equipped with the MIC24055, high-efficiency buck regulator from

Microchip. This IC can work with the wide range of input voltages, from 4.5V up to 19V. The

regulated voltage at the output can be set from 1V to 4.8V by the means of the feedback (FB) pin

and the second chip on board - MCP4921, a single channel 12-bit DAC by Microchip, equipped

with the SPI interface. By programming the output of this DAC through the SPI interface routed

to the mikroBUS socket pins, it is possible to easily set up the output voltage of the buck

regulator. MikroElektronika libraries make it possible to perform this task easily, as seen in the

example application.

HowdoestheMIC24055clickwork?

The MIC24055 IC is used on this click board as the main buck regulating element. It is a

synchronous buck regulator from Microchip, which works with the fixed switching frequency of

600kHz, featuring a unique adaptive on-time control architecture. This buck regulator accepts

input voltages from 4.5V to 19V and outputs voltage from 1V to 4.8V. The buck regulator IC

provides a full suite of safekeeping features to ensure the protection of the IC during fault

conditions, such as the under-voltage lockout, internal soft-start to reduce inrush current, short-

circuit protection and thermal shutdown. MIC24055 click is capable of delivering up to 8A of

continuous output current on its output connector.

To set the desired output voltage, the MIC24055 relies on the feedback voltage of the FB pin.

For that purpose, the FB pin of the MIC24055 is connected to the MCP4921 DAC converter

VOUT pin. The MCP4921 DAC uses the SPI interface and it can be programmed to output a

specific voltage level to the FB pin of the buck regulator. That way, the output voltage of the

buck regulator can be adjusted to the desired level. The buck regulator output voltage is also fed

back to the AN pin of the click board, through the voltage divider. This allows for checking the

output voltage of the regulator, so the software can additionally adjust the level of the DAC

output if needed. For the proper operation of the device, the input voltage needs to be greater

than the set output voltage.

Besides the AN pin, the click board uses the SPI interface pins, EN pin - which is used to enable

the buck regulator chip and the INT pin, which is routed to the PG pin of the MIC24055 buck

regulator. This pin is an open drain output pin, used to signalize the Power Good condition,

which occurs when the output voltage level (VOUT) reaches 92% of its steady state voltage

level. This pin is supplied with the pull-up resistor, connected to the 3.3V rail.

The click board is also equipped with the two 18A connectors, for an easy and secure connection

of the input and output lines.

Specifications

Type Buck

Applications

TheMIC24055clickcanbeusedforpoweringupdeviceswhichrequireregulatedpower

sourcewithsufficientcurrent,suchasserversandworkstations,routers,telecom

equipmentandeveryotherelectronicdevicewithsimilarpowerdemands.

On‐board

modules

Microchip'sMIC24055constant‐frequencysynchronousbuckregulator.Microchip's 

MCP4921singlechannel,12‐bitDACwiththe SPIinterface.

KeyFeatures

Continuousoutputcurrentupto8A,wideinputrangefrom4.5Vto19V,powergood

(PG)output,shortcircuit protection,under‐voltageprotection,fasttransientresponse.

Interface Analog,GPIO,SPI

InputVoltage 3.3V

Clickboard

size

L(57.15x25.4mm)

Pinoutdiagram

ThistableshowshowthepinoutonMIC24055clickcorrespondstothepinoutonthe

mikroBUS™socket(thelattershowninthetwomiddlecolumns).

Notes Pin



Pin Notes

AnalogIn AN 1 AN PWM 16 NC



MIC24055Enable



EN 2 RST INT 15 INT PowerGoodOut

DACChipSelect CS 3 CS RX 14 NC



SPIClock



SCK 4 SCK TX 13 NC



5 MISO SCL 12 NC



SPISDI



MOSI 6 MOSI SDA 11 NC



PowerSupply



+3.3V 7 3.3V 5V 10 NC



Ground



GND 8 GND GND 9 GND Ground

P1-P3 P4-P5

MIKROE-2835

Mfr. #:

Buy MIKROE-2835

Manufacturer:

Mikroe

Description:

Power Management IC Development Tools MIC24055 click

Lifecycle:

New from this manufacturer.

Delivery:

DHL FedEx Ups TNT EMS

Payment:

T/T Paypal Visa MoneyGram Western Union

Products related to this Datasheet

MIKROE-2835