Boost Step up Converter DC-DC 2A MT3608

Description
The MT3608 Mini Adjustable DC-DC Boost Module is a low cost module that can step-up a 2 to 24V input voltage up to a 5 to 28V output at up to 2A.

PACKAGE INCLUDES:
MT3608 Mini Adjustable DC-DC Boost Module
KEY FEATURES OF MT3608 MINI ADJUSTABLE DC-DC BOOST MODULE:
Small size
MT3608 converter IC
Adjustable output voltage using adjustment potentiometer
Excellent load and voltage regulation
Output current of up to 2A
Input voltage range 2 to 24V
Output voltage range 5 to 28V
DC-DC boost converters step up the input voltage to a higher voltage while also stepping down the available current since the module can’t output more power than it inputs.

This boost converter is adjustable and capable of outputting a voltage in the range of 5.0 to 28V at a continuous current of up to 2A depending on input/output voltage settings with 1A available with most settings.

Since it is a boost converter, the input voltage must be lower than the output voltage.

The device is able to use low ESR bulk ceramic capacitors rather than electrolytic caps which avoids long-term aging concerns and contributes to the compact packaging.

The MT3608 converter IC has over current and thermal limiting features built-in to safely shut the device down if driven too hard.

Voltage Adjustment
The module has a multi-turn potentiometer for adjustment of the output voltage.

The upper limit of the adjustment range will depend on the input voltage and the load. With a 9V input for instance, at 1A, the upper voltage limit will be approximately 20V.

Module Connections
These are compact boards with 4 solder pads for making connections. Wire is typically soldered to the pad. Not shown in some of the pictures is a thru-hole on each pad

VIN+ = Input Voltage
VIN- = Ground
OUT+ = Output Voltage
OUT- = Ground. In common with VIN- on module
OUR EVALUATION RESULTS:
For the price, these are decent modules that can be used in a number of non-critical applications. They work best when the output current is kept on the lower end of the spectrum such as 500mA or so. If trying to pull higher current from the module, voltage regulation and load regulation can become poor and in that case the module will work best when used with a fairly stable load and input voltage.

Ripple voltage – Measured @ 500mV typical. It can benefit greatly from adding a bulk filter capacitor on the output. In one worst case test case, a 100uF cap knocked the ripple down from 0.9V to 30mV

Voltage regulation – With the output adjusted to 12V and 500mA load, varying the input voltage over the range of 5 – 9V resulted in a 0.11V change in the output.

Load regulation – With input of 5V and output adjusted to 12V, varying the load over the range of 0.0A to 0.5A resulted in a 0.17V change in the output. Further increasing the load to 1A resulted in a drop of 1.3V

These modules do draw 1mA or so when idle, so if using with a battery, it can drain the battery down when not being used if it is not disconnected.

Notes:

Be sure to properly hook up the input and output connections before applying power to avoid possible damage to the module.
Under higher current loads, the components can get fairly hot, so use care when handling.
Technical Specifications
Maximum Ratings
VIN Input Voltage 2 – 24V
IO Maximum Output Current (peak) 2A
Operating Ratings
VO Output Voltage Range 5 – 28V
IO Output Current (max continuous) 1.0A (recommended)
Switching Frequency 1.2MHz
Output Ripple 500mV (typical measured)
Efficiency Varies depending on load Up to 92%
Electrical Isolation Non-isolated
Dimensions L x W x H 37 x 17 x 7mm
Datasheet MT3608 IC