Details

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BUY MC3479P https://www.utsource.net/itm/p/12536208.html

Parameter	Symbol	Min	Typical	Max	Unit	Description
Supply Voltage	VIN	2.7	-	5.5	V	Operating supply voltage range
Output Voltage	VOUT	-	3.3	-	V	Fixed output voltage
Output Current	IOUT	-	150	250	mA	Maximum continuous output current
Quiescent Current	IQ	-	1.0	-	μA	Quiescent current at no load
Dropout Voltage	VDO	-	200	-	mV	Dropout voltage at IOUT = 150 mA
Load Regulation	-	-	0.5	-	%	Load regulation from 0 to 150 mA
Line Regulation	-	-	0.05	-	%/V	Line regulation over input range
Thermal Shutdown	TSD	-	160	-	°C	Thermal shutdown temperature
Operating Junction Temp.	TJ	-40	-	125	°C	Operating junction temperature range

Instructions for Use:

1. Supply Voltage (V_IN):

   • Ensure the supply voltage is within the range of 2.7V to 5.5V.
   • Connect the input voltage to the VIN pin.

2. Output Voltage (V_OUT):

   • The MC3479P provides a fixed output voltage of 3.3V.
   • Connect the output voltage to the VOUT pin.

3. Output Current (I_OUT):

   • The device can provide up to 250mA of output current, with a typical continuous output current of 150mA.
   • Ensure that the load does not exceed the maximum output current to avoid overheating or damage.

4. Quiescent Current (I_Q):

   • The quiescent current is typically 1.0μA when there is no load on the output.
   • This low quiescent current makes the device suitable for battery-powered applications.

5. Dropout Voltage (V_DO):

   • The dropout voltage is typically 200mV at an output current of 150mA.
   • Ensure that the input voltage is at least 200mV higher than the output voltage to maintain regulation.

6. Load Regulation:

   • The load regulation is typically 0.5% from 0 to 150mA.
   • This indicates that the output voltage will remain stable even as the load current changes.

7. Line Regulation:

   • The line regulation is typically 0.05%/V over the input voltage range.
   • This ensures that the output voltage remains stable even if the input voltage fluctuates.

8. Thermal Shutdown:

   • The device has thermal protection and will shut down if the junction temperature exceeds 160°C.
   • Ensure proper heat dissipation to prevent thermal shutdown.

9. Operating Junction Temperature (T_J):

   • The operating junction temperature range is from -40°C to 125°C.
   • Ensure that the device operates within this temperature range to avoid performance issues or damage.

10. Capacitors:

    • Use appropriate input and output capacitors to ensure stability and filter out noise.
    • Typically, a 1μF ceramic capacitor is recommended for both the input and output.

11. PCB Layout:

    • Place the input and output capacitors close to the respective pins to minimize parasitic inductance.
    • Ensure good thermal management by providing adequate copper area for heat dissipation.

By following these parameters and instructions, you can effectively use the MC3479P in your circuit design.

(For reference only)