Details

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BUY QN8007B https://www.utsource.net/itm/p/8145030.html

Parameter	Description	Min	Typ	Max	Unit
Input Voltage	Operating voltage range	2.5	-	5.5	V
Output Current	Continuous output current	-	3	5	A
Efficiency	Power conversion efficiency	-	90	-	%
Switching Frequency	Internal oscillator frequency	-	1.2	-	MHz
Quiescent Current	Current consumption in standby mode	-	20	-	μA
Dropout Voltage	Voltage difference between VIN and VOUT at rated load	-	180	-	mV

Instructions for QN8007B:

1. Power Supply Connection: Connect the input voltage within the specified range (2.5V to 5.5V) to the VIN pin and ensure a stable power supply.
2. Output Configuration: The output current can be set up to 5A. Ensure the load does not exceed this limit to avoid damage.
3. Heat Dissipation: For applications requiring high output current, consider using a heatsink or ensuring adequate ventilation to manage heat.
4. Capacitor Selection: Use appropriate input and output capacitors to stabilize the power supply and reduce ripple. Recommended values are typically provided in the datasheet.
5. PCB Layout: Follow recommended PCB layout guidelines to minimize noise and improve performance.
6. Efficiency Optimization: To achieve the typical efficiency of 90%, ensure that the switching frequency and component selection align with optimal operating conditions.
7. Standby Mode: When the device is in standby, it consumes approximately 20μA. Design your circuit to account for this quiescent current if low-power operation is critical.
8. Dropout Consideration: At rated load, the dropout voltage is around 180mV. Ensure that the input voltage remains sufficiently above the output voltage to maintain regulation.

(For reference only)