Details

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BUY BU18400B-PS https://www.utsource.net/itm/p/12592138.html

Parameter	Symbol	Conditions	Min	Typ	Max	Unit
Supply Voltage	VCC	Operating	2.7	-	5.5	V
Output Current	IOUT	Continuous	-	1.5	3.0	A
Efficiency	畏	At nominal load	-	85	90	%
Switching Frequency	fSW	Typical	-	2.1	-	MHz
Quiescent Current	IQ	No load	-	60	-	渭A
Dropout Voltage	VDROPOUT	IOUT = 300mA	-	300	-	mV
Operating Temperature	TOPR	Junction	-40	-	125	掳C

Instructions for BU18400B-PS:

1. Power Supply Connection:

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

2. Output Configuration:

   • Ensure that the output capacitor is connected between the VOUT pin and GND to stabilize the output voltage.

3. Thermal Management:

   • Place the device on a PCB with adequate copper area or heat sink to dissipate heat, especially under high current conditions.

4. Input Capacitor:

   • Use an input capacitor (typically 1渭F) between VCC and GND close to the IC to reduce noise and transient effects.

5. Load Connection:

   • Connect the load between the VOUT pin and GND. Ensure the load does not exceed the maximum output current rating.

6. Operating Temperature:

   • Operate the device within the specified temperature range (-40掳C to 125掳C) to ensure reliable performance.

7. Efficiency Considerations:

   • For optimal efficiency, operate the device at its typical operating point as indicated in the parameter table.

8. Protection Features:

   • The device includes internal protection features such as thermal shutdown and current limiting. These features activate automatically under fault conditions.

9. Layout Recommendations:

   • Follow good PCB layout practices, keeping traces short and wide where possible, especially for power and ground connections, to minimize inductance and resistance.

(For reference only)