How to Use wz3605e: Examples, Pinouts, and Specs

The WZ3605E, manufactured by Stas (Part ID: 5), is a high-performance voltage regulator designed to deliver a stable output voltage with low dropout. This component is ideal for power management applications, ensuring consistent voltage levels for sensitive electronic components. Its compact design and reliable performance make it a popular choice in consumer electronics, industrial systems, and embedded devices.

• Power supply stabilization for microcontrollers and sensors
• Battery-powered devices requiring low dropout voltage
• Consumer electronics such as smartphones and tablets
• Industrial automation systems
• Embedded systems and IoT devices

The WZ3605E is available in a 5-pin SOT-23 package. The pinout is as follows:

1. Input Capacitor: Connect a ceramic capacitor (e.g., 1µF) between the VIN pin and GND to stabilize the input voltage.
2. Output Capacitor: Connect a ceramic capacitor (e.g., 1µF to 10µF) between the VOUT pin and GND to ensure stable output voltage.
3. Enable Pin: The EN pin must be pulled high (above 1.2V) to enable the regulator. If unused, connect it to VIN.
4. Load Connection: Connect the load to the VOUT pin. Ensure the load does not exceed the maximum output current of 500mA.
5. Thermal Considerations: Ensure adequate heat dissipation, especially in high-current applications.

Below is a basic circuit diagram for using the WZ3605E:

   VIN (2.5V-18V) ----+----[C1: 1µF]----+---- VIN (Pin 1)
                      |                 |
                     GND               GND (Pin 2)
                      |
                     EN (Pin 3) ----+----[Pull-up Resistor]---- VIN
                                    |
                                   GND
                      |
                     VOUT (Pin 4) ----+----[C2: 10µF]----+---- Load
                                      |                  |
                                     GND                GND

The WZ3605E can be used to power an Arduino UNO or other microcontrollers. Below is an example code snippet to toggle the EN pin using a digital output pin from the Arduino:

// Define the pin connected to the EN pin of the WZ3605E
const int enablePin = 7;

void setup() {
  // Set the enable pin as an output
  pinMode(enablePin, OUTPUT);

  // Enable the voltage regulator
  digitalWrite(enablePin, HIGH); // Pull EN pin high to enable the regulator
}

void loop() {
  // The regulator remains enabled; add your application code here
  delay(1000); // Placeholder for main loop functionality
}

• Ensure the input voltage is within the specified range (2.5V to 18V).
• Use low-ESR ceramic capacitors for input and output to maintain stability.
• Avoid exceeding the maximum output current of 500mA to prevent damage.
• If the EN pin is not used, connect it to VIN to keep the regulator enabled.

1. Can the WZ3605E be used with a 3.3V microcontroller? Yes, the WZ3605E can regulate input voltages down to 3.3V, provided the dropout voltage is accounted for.

2. What happens if the EN pin is left floating? The regulator may not function correctly. Always connect the EN pin to VIN or a high signal to enable the regulator.

3. Can I use electrolytic capacitors instead of ceramic capacitors? While possible, ceramic capacitors are recommended due to their low ESR, which ensures stability.

4. Is the WZ3605E protected against short circuits? Yes, the WZ3605E includes built-in short-circuit protection to safeguard the device and connected components.

By following this documentation, users can effectively integrate the WZ3605E into their designs and troubleshoot common issues with ease.