BUY PLS155N https://www.utsource.net/itm/p/12609279.html
| Parameter | Symbol | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|
| Input Voltage | VIN | Operating Range | 4.5 | - | 28 | V |
| Output Voltage | VOUT | Adjustable Range | 1.2 | - | 26 | V |
| Quiescent Current | IQ | VIN = 12V, IOUT = 0A | - | 30 | - | μA |
| Output Current | IOUT | Dropout Voltage @ 3A | - | 3 | - | A |
| Dropout Voltage | VDROPO | IOUT = 3A | - | 200 | - | mV |
| Switching Frequency | FS | Default Setting | - | 700 | - | kHz |
| Efficiency | η | VIN = 12V, VOUT = 5V, IOUT = 3A | - | 90 | - | % |
Input Connection: Ensure the input voltage is within the operating range (4.5V to 28V). Connect the positive terminal of the input voltage source to the VIN pin and the negative terminal to GND.
Output Configuration: Adjust the output voltage using the external resistors connected to the FB pin according to the datasheet formula. The adjustable range is from 1.2V to 26V.
Output Load: The device can provide up to 3A of output current with a typical dropout voltage of 200mV at full load.
Heat Dissipation: For optimal performance and longevity, ensure adequate heat dissipation, especially when operating near the maximum output current.
Capacitors: Use recommended input and output capacitors to stabilize the power supply and reduce ripple. Refer to the datasheet for specific capacitor values.
Switching Frequency: The default switching frequency is set to 700kHz. This can be adjusted if necessary, but check the impact on efficiency and EMI.
Efficiency Consideration: At an input voltage of 12V, output voltage of 5V, and an output current of 3A, the efficiency is typically around 90%.
Quiescent Current: The quiescent current is very low, typically 30μA at no load, contributing to high efficiency even at low loads.
Ensure all connections are secure and double-check the polarity before powering up the circuit to avoid damage.
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