Details

---

BUY XR3403 https://www.utsource.net/itm/p/12606060.html

Parameter	Description	Min	Typ	Max	Unit
Supply Voltage (Vcc)	Operating voltage range	2.7	-	5.5	V
Output Current (Iout)	Maximum continuous output current	-	1.5	3.0	A
Quiescent Current (Iq)	Current consumed by the IC when no load is applied	2.5	-	5.0	mA
Dropout Voltage (Vdo)	Voltage difference between input and output for regulation	0.3	-	0.8	V
Output Voltage Range (Vout)	Adjustable output voltage range	1.25	-	15.0	V
Thermal Shutdown Temperature (TSD)	Temperature at which the IC shuts down to prevent damage	-	-	160	掳C
Protection Features	Overcurrent, thermal, and short-circuit protection	-	Yes	-	-

Instructions for Using XR3403

1. Power Supply Connection:

   • Connect the positive terminal of the power supply to the VIN pin.
   • Connect the negative terminal of the power supply to the GND pin.

2. Output Configuration:

   • Connect the load to the VOUT pin.
   • Use external resistors to set the desired output voltage. The formula for calculating the output voltage is: [ V_{text} = V_{text} left(1 + fracright) ] where ( V_{text} = 1.25 ) V, ( R_1 ) is the resistor connected between VOUT and ADJ, and ( R_2 ) is the resistor connected between ADJ and GND.

3. Capacitor Requirements:

   • Place a 1 渭F ceramic capacitor between VIN and GND to filter input noise.
   • Place a 1 渭F ceramic capacitor between VOUT and GND to stabilize the output.

4. Thermal Considerations:

   • Ensure adequate heat dissipation if operating at high currents or in high ambient temperatures.
   • Use a heatsink if necessary to keep the junction temperature below 160掳C.

5. Protection Features:

   • The IC includes overcurrent, thermal, and short-circuit protection. These features will automatically shut down the device if any of these conditions are detected.

6. Layout Recommendations:

   • Keep the layout compact and minimize trace lengths to reduce parasitic inductance and capacitance.
   • Use wide traces for power and ground connections to reduce resistance and improve heat dissipation.

7. Testing:

   • After assembly, test the output voltage with a multimeter to ensure it matches the desired value.
   • Gradually increase the load to verify the maximum output current capability and stability.

By following these instructions, you can effectively use the XR3403 in your application.

(For reference only)