Details

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BUY MC33984CHFK https://www.utsource.net/itm/p/12536020.html

Parameter	Symbol	Min	Typ	Max	Unit	Conditions
Input Voltage	VIN	4.5	-	40	V
Output Voltage	VOUT	-	12	16	V	Adjustable
Output Current	IOUT	-	1.5	3	A	Continuous
Switching Frequency	fSW	-	200	500	kHz	Adjustable
Efficiency	η	-	92	-	%	@ VOUT = 12V, IOUT = 1A
Quiescent Current	IQ	-	10	20	mA	VIN = 12V, No Load
Shutdown Current	ISD	-	1	5	μA	VIN = 12V, SHDN = 0V
Thermal Shutdown	TSD	-	160	-	°C	Internal
Operating Temperature	TOPR	-40	-	125	°C
Storage Temperature	TSTG	-65	-	150	°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 (4.5V to 40V).

2. Output Configuration:

   • Set the output voltage (VOUT) using the external feedback resistors. The typical output voltage is 12V, but it can be adjusted between 12V and 16V.
   • Ensure the load current does not exceed the maximum output current (3A).

3. Switching Frequency Adjustment:

   • The switching frequency (fSW) can be adjusted using an external resistor connected to the FREQ pin. The typical range is 200kHz to 500kHz.

4. Thermal Management:

   • Ensure proper heat dissipation to prevent the device from exceeding the thermal shutdown temperature (160°C). Use a heatsink if necessary.

5. Shutdown Control:

   • To shut down the device, pull the SHDN pin to ground (0V). The shutdown current will be less than 5μA.
   • To activate the device, apply a high signal (typically 3V to 5V) to the SHDN pin.

6. Operating and Storage Temperature:

   • Operate the device within the specified operating temperature range (-40°C to 125°C).
   • Store the device within the specified storage temperature range (-65°C to 150°C).

7. Protection Features:

   • The device includes overcurrent protection, thermal shutdown, and undervoltage lockout (UVLO) to ensure safe operation.

8. Layout Considerations:

   • Keep the input and output capacitors close to the device to minimize parasitic inductance.
   • Use wide traces for high-current paths to reduce resistance and heating.

9. Capacitor Selection:

   • Choose input and output capacitors with appropriate ratings to handle the ripple current and voltage levels. X7R or X5R ceramic capacitors are recommended for their stability and low ESR.

10. Inductor Selection:

    • Select an inductor with a saturation current higher than the maximum output current and a DC resistance (DCR) that minimizes power loss.

By following these instructions, you can ensure optimal performance and reliability of the MC33984CHFK.

(For reference only)