SE350 Datasheet, Price, PDF

SE350

The SE350 is a great choice for embedded systems, offering a compact, all-in-one power solution. It efficiently handles both buck and boost conversions, which makes it perfect for applications where power efficiency is key. With a wide input voltage range, it can easily fit into different setups. Its low power consumption ensures devices run smoothly without draining batteries, and its design keeps things cool even when under load. Plus, its small size makes it ideal for tight spaces, whether you’re working with wearables, IoT sensors, or other portable devices.

SE350 Equivalent Replacement

If you’re considering replacements, the TPS7A02 has a lower output current (2A) than the SE350, which can handle 3A. So, if you need more current, the SE350 or LTC3035 might be a better fit. The LTC3035 is similar to the SE350 in output (3A) and efficiency (up to 92%), making it a strong alternative, especially if you’re looking for similar performance and power handling. While the TPS7A02 has slightly better efficiency (up to 94%), it won’t be ideal for higher power needs due to its lower current output.

SE350 Battery Backup Circuit Example

This circuit is a straightforward voltage regulator setup, using a power management IC like the SE350 for a battery backup system. Here’s how it works: the V_BAT pin is the battery source, providing power when the main supply is down. The input and output capacitors (C_IN and C_OUT) smooth out any voltage fluctuations to keep everything stable. The EN pin controls whether the SE350 is on or off. The SE350 regulates the input voltage and ensures a steady output to the load.

When the battery is connected, the SE350 stabilizes the voltage and powers the load. The capacitors filter out noise, ensuring smooth operation. By controlling the EN pin, you can easily switch the system on or off.

SE350 Power Supply Connection Guide

Here’s how to connect the SE350 power management IC in your circuit:

First, connect the VIN pin to your power source, whether it’s a battery or DC adapter. Make sure the voltage is between 3V and 5.5V.

Next, hook up the VOUT pin to the load you want to power—things like sensors or microcontrollers. If you need a specific output voltage, use a feedback resistor network to adjust it. The SE350 can handle output voltages from 1.8V to 5V.

The EN pin controls whether the IC is on or off. Apply a high signal (2.5V to 5V) to turn it on, and it’ll regulate the output. If you send it a low signal, the IC stays off.

Finally, connect the GND pin to the circuit’s ground, and add capacitors (CIN and COUT) to smooth input and output voltages for stable power.

SE350 Surge Protection Circuit

This setup is a simple surge protection circuit using the SE350 or a similar power management IC. Here’s how it works:

The input (VIN) gets its power from a DC source or a battery. C2, a 1µF capacitor, filters out high-frequency noise and absorbs voltage spikes, helping to stabilize the input voltage. The SE350 regulates the voltage and offers protection, with features like overvoltage and thermal shutdown to handle surges. C1, another 1µF capacitor at the output, smooths out the voltage to keep things stable.

The load (J3) is powered by the SE350, and surge protection keeps it safe from voltage spikes. With proper grounding and the right capacitors, your sensitive components are protected and can run longer without damage.