Details

---

BUY KTC3875-Y-RTK https://www.utsource.net/itm/p/12598169.html

Parameter	Description
Part Number	KTC3875-Y-RTK
Type	Power Management IC
Function	Step-down DC-DC Converter
Input Voltage Range	4.5V to 28V
Output Voltage Range	0.8V to 18V (Adjustable)
Output Current	Up to 5A
Switching Frequency	650kHz (Fixed)
Efficiency	Up to 95%
Package	SOP-8
Operating Temperature	-40掳C to +85掳C
Protection Features	Overcurrent Protection, Overtemperature Protection, Undervoltage Lockout
Quiescent Current	30渭A (Typical)
Enable Pin	Yes
Shutdown Current	1渭A (Typical)

Instructions for Use

1. Circuit Design:

   • Ensure the input voltage is within the specified range (4.5V to 28V).
   • Connect the output capacitor (typically 10渭F to 100渭F) close to the output pins to maintain stability.
   • Use an inductor with a value suitable for the desired output current and switching frequency (e.g., 4.7渭H for 5A).

2. Output Voltage Setting:

   • The output voltage can be adjusted using an external resistor divider connected to the feedback pin (FB).
   • Calculate the resistor values using the formula: ( V_ = V_ times left(1 + fracright) ), where ( V_ ) is typically 0.8V.

3. Enable Function:

   • The enable pin (EN) can be used to control the on/off state of the converter.
   • Apply a high signal (e.g., 3.3V or 5V) to turn on the converter.
   • Apply a low signal (e.g., 0V) to turn off the converter.

4. Thermal Considerations:

   • Ensure adequate heat dissipation by mounting the IC on a heatsink or using a PCB with good thermal conductivity.
   • Monitor the temperature to ensure it stays within the operating range (-40掳C to +85掳C).

5. Protection:

   • The IC includes overcurrent, overtemperature, and undervoltage lockout protection.
   • Do not exceed the maximum ratings to avoid damage to the device.

6. Layout Guidelines:

   • Keep the input and output capacitors as close as possible to the IC to minimize parasitic inductance.
   • Use wide traces for power lines to reduce resistance and improve efficiency.
   • Place the inductor and output capacitor on the same side of the PCB to minimize loop area and reduce EMI.

7. Testing:

   • Before finalizing the design, test the circuit under various load conditions to ensure stable operation and meet performance requirements.
   • Verify the output voltage and current limits to ensure they match the expected values.

(For reference only)