Details

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BUY MP1620 https://www.utsource.net/itm/p/12611076.html

Parameter	Description	Value
Input Voltage (VIN)	Operating input voltage range	3.5V to 28V
Output Voltage (VOUT)	Adjustable output voltage range	0.8V to VIN - 0.5V
Switching Frequency (fSW)	Fixed switching frequency	1.2MHz
Output Current (IOUT)	Maximum continuous output current	3A
Quiescent Current (IQ)	Quiescent current at no load	25渭A
Shutdown Current (ISD)	Shutdown mode current	<1渭A
Thermal Shutdown (TSD)	Thermal shutdown temperature	160掳C (typical)
Package	Package type	SOIC-8, QFN-10
Operating Temperature (TA)	Ambient operating temperature range	-40掳C to +125掳C
Storage Temperature (TSTG)	Storage temperature range	-65掳C to +150掳C

Instructions for Use

1. Power Supply Connection:

   • Connect the input voltage (VIN) to the power supply.
   • Ensure the input voltage is within the specified range (3.5V to 28V).

2. Output Voltage Setting:

   • Use an external resistor divider to set the output voltage (VOUT).
   • The formula to calculate the output voltage is: ( V_ = V_ times left(1 + fracright) ), where ( V_ = 0.8V ).

3. Inductor Selection:

   • Choose an inductor with a value that ensures stable operation and efficient performance.
   • Typical inductor values range from 1渭H to 4.7渭H.

4. Capacitor Selection:

   • Use low ESR ceramic capacitors for both input and output filtering.
   • Input capacitance should be at least 10渭F.
   • Output capacitance should be at least 10渭F.

5. Thermal Management:

   • Ensure adequate heat dissipation, especially when operating at high output currents.
   • Consider using a heatsink or thermal pad if necessary.

6. Shutdown Function:

   • To enter shutdown mode, pull the SHDN pin low.
   • The shutdown current is less than 1渭A.

7. Layout Considerations:

   • Keep the input and output capacitor leads as short as possible to minimize parasitic inductance.
   • Place the inductor close to the IC to reduce noise and improve stability.

8. Protection Features:

   • The MP1620 includes overcurrent protection, thermal shutdown, and undervoltage lockout (UVLO) to protect the device and system.

9. Testing and Verification:

   • After assembly, test the circuit under various load conditions to ensure it meets the design specifications.
   • Verify the output voltage, efficiency, and thermal performance.

(For reference only)