Details

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BUY BD9479FV https://www.utsource.net/itm/p/12593523.html

Parameter	Symbol	Conditions	Min	Typ	Max	Unit
Input Voltage	VIN	Continuous	2.5	-	5.5	V
Output Voltage	VOUT	Adjustable	0.8	-	5.0	V
Output Current	IOUT	Continuous	-	3.0	-	A
Quiescent Current	IQ	VIN = 5V, VOUT = 3.3V, IOUT = 0A	-	60	-	渭A
Shutdown Current	ISD	VIN = 5V, EN = Low	-	1	-	渭A
Efficiency	畏	VIN = 5V, VOUT = 3.3V, IOUT = 3A	-	92	-	%
Switching Frequency	fSW	Typical	-	2.2	-	MHz
Operating Temperature Range	TOPR	-	-40	-	125	掳C
Storage Temperature Range	TSTG	-	-65	-	150	掳C

Instructions for BD9479FV

1. Input Voltage (VIN):

   • Ensure the input voltage is within the range of 2.5V to 5.5V.
   • Use appropriate decoupling capacitors (typically 10渭F and 0.1渭F) close to the input pins to stabilize the input voltage.

2. Output Voltage (VOUT):

   • The output voltage can be adjusted from 0.8V to 5.0V using external resistors.
   • Use the formula: ( V_ = V_ left(1 + fracright) ), where ( V_ ) is typically 0.8V.

3. Output Current (IOUT):

   • The device can provide a continuous output current of up to 3A.
   • Ensure proper heat dissipation if operating at high currents.

4. Quiescent Current (IQ):

   • The quiescent current is typically 60渭A under no load conditions.
   • This value helps in assessing the power consumption in low-power applications.

5. Shutdown Current (ISD):

   • When the enable pin (EN) is set to low, the shutdown current is typically 1渭A.
   • Use this feature to minimize power consumption during standby or off states.

6. Efficiency (畏):

   • The efficiency is typically 92% when VIN = 5V, VOUT = 3.3V, and IOUT = 3A.
   • Efficiency can vary with different input and output conditions.

7. Switching Frequency (fSW):

   • The typical switching frequency is 2.2MHz.
   • This frequency helps in selecting appropriate inductors and capacitors for the output filter.

8. Operating Temperature Range (TOPR):

   • The device operates reliably within the temperature range of -40掳C to 125掳C.
   • Ensure the ambient temperature does not exceed these limits.

9. Storage Temperature Range (TSTG):

   • The device can be stored in temperatures ranging from -65掳C to 150掳C.
   • Avoid exposing the device to extreme temperatures for extended periods.

10. Layout Considerations:

    • Place the input and output capacitors as close as possible to the respective pins to minimize parasitic inductance.
    • Use wide and short traces for power paths to reduce resistance and inductance.
    • Ensure proper grounding and thermal management to maintain optimal performance.

(For reference only)