Specifications
SKU: 11769257
Parameter | Symbol | Min | Typical | Max | Unit |
---|---|---|---|---|---|
Input Voltage | VIN | 4.5 | - | 40 | V |
Output Voltage Range | VOUT | 1.23 | - | 37 | V |
Output Current | IOUT | - | 3 | - | A |
Quiescent Current | IQ | - | 5 | - | mA |
Dropout Voltage | VDROPOUT | - | 1.2 | - | V |
Switching Frequency | fSW | - | 150 | - | kHz |
Efficiency (Typical) | η | - | 85 | - | % |
Load Regulation | ΔVOUT/ΔILOAD | - | 0.1 | - | % |
Line Regulation | ΔVOUT/ΔVIN | - | 0.1 | - | % |
Thermal Shutdown | TSD | - | 160 | - | °C |
Storage Temperature | TSTG | -40 | - | 125 | °C |
Instructions for Use
Input Capacitor (CIN):
- Place a 10 μF tantalum or ceramic capacitor close to the input pin to ensure stable operation.
- For better transient response, a 0.1 μF ceramic capacitor can be added in parallel.
Output Capacitor (COUT):
- Use a 100 μF electrolytic or tantalum capacitor for the output to maintain stability.
- For improved performance, a 10 μF ceramic capacitor can be added in parallel.
Feedback Resistor Network:
- The output voltage is set using a feedback resistor network. The formula to calculate the output voltage is: [ V_ = 1.23 left(1 + fracright) ]
- Choose R1 and R2 such that the output voltage falls within the specified range.
Inductor Selection:
- Select an inductor with a value between 10 μH and 100 μH.
- Ensure the inductor can handle the maximum current without saturating.
PCB Layout:
- Keep the ground plane solid and wide to minimize noise.
- Place decoupling capacitors as close as possible to the IC pins.
- Use short and wide traces for high current paths.
Thermal Considerations:
- Ensure adequate heat dissipation by providing a good thermal path to the PCB.
- If operating at high currents, consider using a heatsink.
Overvoltage Protection:
- Add a Zener diode across the output to protect against overvoltage conditions.
Short-Circuit Protection:
- The LM2594MX-ADJ/NOPB has built-in short-circuit protection, but external fuses may be added for additional safety.
Start-Up Time:
- The start-up time is typically around 1 ms. Ensure that the input voltage rises slowly to avoid inrush current issues.
Storage and Handling:
- Store the device in a dry environment to prevent moisture damage.
- Handle with care to avoid static discharge, which can damage the IC.
By following these guidelines, you can ensure optimal performance and reliability of the LM2594MX-ADJ/NOPB in your application.
(For reference only)Inquiry - LM2594MX-ADJ/NOPB