MT3608 Boost Converter Datasheet & Schematic

MT3608 Ayarlanabilir DC DC Voltaj Regülatörü

Mt3608

The MT3608 is a really handy DC-DC boost converter chip, especially when your project needs a higher voltage from a lower input, like powering a 12V device from a 5V battery. It handles input voltages from 2V to 24V and can boost the output up to around 28V. While it supports peak currents up to 4A, sticking below 2A usually gives you the best efficiency and stability.

What’s nice about this chip is the built-in MOSFET switch, making your circuit simpler with fewer external components. Plus, the high switching frequency of 1.2MHz means you can use smaller inductors and capacitors, saving PCB space.

Remember to carefully choose your inductors and capacitors based on recommended specs and keep your PCB layout neat to reduce interference. With built-in safety features like overheating and overcurrent protection, the MT3608 is perfect for USB chargers, LED drivers, portable gadgets, or IoT devices needing efficient, reliable power boosting.

Mt3608 Pinout Diagram

When using the MT3608, there are a few key things to keep in mind for each pin to get the best results. First, the SW pin (pin 1) is your main switching output, so keep connections to your inductor and diode short and tidy. This reduces interference and noise in your circuit.

For the FB pin (pin 3), you’ll set your output voltage by choosing accurate resistor values. Make sure these resistors are precise, because they directly control how stable and accurate your output voltage is.

The EN pin (pin 4) is your enable pin. If you always want the chip running, just tie this pin to your input voltage. If you don’t need control over enabling the chip, that’s the simplest way to handle it.

Lastly, your VIN (pin 5) and GND (pin 2) pins need stable, solid connections. Place a 10μF ceramic capacitor as close to these pins as possible for smooth operation. Pin 6 (NC) isn’t used, so leave it disconnected.

Mt3608 Equivalent

When picking a replacement for your MT3608, always double-check a few important details. First, make sure the alternative chip covers the voltage range you’re working with—both input and output. Also, look at the current rating: if your device needs more power, choose something equal or stronger than your original chip. Switching frequency matters too; higher-frequency chips like SX1308 usually mean smaller inductors and capacitors. Lastly, if you don’t want to redo your PCB layout, verify the replacement has similar pin functions. SX1308 or FP6291 are good swaps, but confirm these specs first to ensure smooth, stable performance.

Mt3608 Step Up Converter Circuit

This MT3608 boost converter circuit helps when your input voltage is low—like batteries—and you need a stable higher output voltage. The MT3608 chip controls the whole boosting process. The inductor (L1, usually around 22μH) temporarily stores and releases energy to bump up voltage. The Schottky diode (like SS34) quickly sends this energy out to your load. Adjusting the output voltage is easy—just tweak the resistor RP1. Capacitors C1 and C2 smooth out voltage fluctuations. You’ll find this setup handy in portable gadgets, USB charging circuits, LED lights, or anywhere you need efficient, adjustable voltage boosting.

Mt3608 Lithium Battery to 5v

If you’re powering USB gadgets or portable devices from a single lithium battery (around 3.7V), you’ll often need a stable 5V output—this is exactly where the MT3608 boost circuit helps you. The MT3608 chip manages voltage conversion, while the inductor (22μH) temporarily stores energy to boost voltage. A Schottky diode (like SS34) quickly transfers this energy, keeping efficiency high. Capacitors (22μF) smooth out the output, and adjusting the feedback resistor sets your exact 5V output. Remember to include battery protection to prevent over-discharge, and keep your layout tight to reduce interference. You’ll get a compact, efficient, reliable power source.

Mt3608 Led Driver Project

If you’re working on an LED driver project using the MT3608 chip, here’s how it works: the MT3608 boosts your input voltage (like 3.7V from a lithium battery) to whatever higher voltage your LED needs. The key parts include a 22μH inductor for energy storage, a fast diode like the SS34 to efficiently transfer power, and 22μF capacitors to smooth out voltage ripples. Adjusting output voltage is easy—just tweak the feedback resistors. To keep your LEDs safe, always include a resistor or constant-current driver to limit current and make sure your LEDs stay cool enough for reliable operation.

Mt3608 Ripple Filtering

When you’re using an MT3608 boost circuit, you’ll usually see some ripple—small voltage fluctuations at the output—because of its high-frequency switching. Too much ripple isn’t great, especially for sensitive electronics. To fix this, try adding a low-ESR ceramic capacitor (22μF to 47μF) at the output for high-frequency smoothing. For even better results, pair it with a 100μF electrolytic capacitor to handle mid-to-low frequencies. If your circuit needs ultra-clean output, adding a small LC filter (2.2μH inductor plus 22μF capacitor) works wonders. Keep capacitors close to the chip and wires short—this helps cut ripple down even further.

Mt3608 Soldering Guide

Here’s a quick guide to soldering the MT3608 chip (SOT-23-6 package) successfully. First, make sure your PCB pads are clean—no dirt, grease, or oxidation. Using a bit of no-clean flux helps solder flow smoothly.

Place the chip carefully on the PCB pads using tweezers, checking the alignment against the markings. To secure its position, solder one corner pin first—just a quick touch for about 2–3 seconds. Then confirm alignment again.

Next, solder the remaining pins quickly, keeping each under 3 seconds to avoid overheating and damaging the chip. Your iron temperature should be about 320–350°C, and thinner solder wire (0.3–0.5mm) works best.

Once finished, inspect carefully—each joint should be shiny and smooth, without bridges or shorts. Finally, clean off any leftover flux with isopropyl alcohol and dry thoroughly. Remember, avoid reheating pins too often and keep the iron temperature moderate to protect your MT3608 chip.

Mt3608 Smps Power Supply Design

If you’re working on a project that needs to boost voltage from something like a 3.7V lithium battery up to 5V, 12V, or higher, the MT3608 chip is a great pick. It’s efficient, simple, and keeps power losses low.

Inside the MT3608, there’s a built-in MOSFET and a fixed-frequency PWM controller running at 1.2MHz. To get the voltage boost, you just need a suitable inductor (usually around 4.7–22µH) and a Schottky diode, like the SS34, which helps the circuit switch quickly and efficiently.

When selecting capacitors for filtering the output, go for low-ESR ceramic or tantalum types to minimize ripple. Also, pay close attention to your PCB layout—keep loops tight and compact to reduce noise. Pick your feedback resistors carefully because they determine your exact output voltage.

Thanks to its compact size and easy setup, you’ll find MT3608 perfect for portable gadgets, LED drivers, or anything battery-powered.