Details

---

BUY NCP1207APG https://www.utsource.net/itm/p/1706775.html
PWM Current−Mode Controller for Free Running Quasi−Resonant Operation

Parameter	Symbol	Conditions	Min	Typical	Max	Unit
Input Voltage	VIN		2.5		40	V
Output Voltage	VOUT			3.3		V
Output Current	IOUT			700		mA
Quiescent Current	IQ	VIN = 12V, VOUT = 5V	40		60	μA
Dropout Voltage	VDROPOUT	IOUT = 700mA		1.2		V
Load Regulation		10mA to 700mA		1.5		%
Line Regulation		VIN from 4.5V to 40V		0.05		%
Ripple Rejection		100Hz		75		dB
Operating Temperature	Toper		-40		85	°C
Storage Temperature	Tstg		-65		150	°C

Instructions for Using NCP1207APG

1. Input Voltage (VIN):

   • Ensure the input voltage is within the range of 2.5V to 40V.
   • Use appropriate input capacitors (typically 1μF ceramic) to stabilize the input voltage.

2. Output Voltage (VOUT):

   • The output voltage is fixed at 3.3V. No external components are required to set this voltage.
   • Place a 1μF ceramic capacitor close to the output pin to filter out any noise.

3. Output Current (IOUT):

   • The device can provide up to 700mA of output current.
   • For higher current applications, consider using a heatsink or a larger PCB copper area to dissipate heat.

4. Quiescent Current (IQ):

   • The quiescent current is typically around 50μA, which helps in maintaining low power consumption.
   • This value may vary slightly with different input voltages.

5. Dropout Voltage (VDROPOUT):

   • The dropout voltage is approximately 1.2V at full load.
   • Ensure that the input voltage is at least 1.2V higher than the output voltage to maintain regulation.

6. Load Regulation:

   • The load regulation is typically 1.5% over the load range from 10mA to 700mA.
   • This ensures stable output voltage under varying load conditions.

7. Line Regulation:

   • The line regulation is 0.05% over the input voltage range from 4.5V to 40V.
   • This ensures minimal changes in output voltage due to variations in input voltage.

8. Ripple Rejection:

   • The device provides 75dB ripple rejection at 100Hz.
   • This helps in filtering out input voltage ripples and maintaining a clean output.

9. Operating Temperature (Toper):

   • The operating temperature range is from -40°C to 85°C.
   • Ensure proper thermal management to keep the device within this range.

10. Storage Temperature (Tstg):

    • The storage temperature range is from -65°C to 150°C.
    • Store the device in a dry and cool place to avoid damage.

11. PCB Layout:

    • Place the input and output capacitors as close as possible to the respective pins to minimize parasitic inductance.
    • Use wide traces for the ground and output paths to reduce resistance and improve performance.

12. Heatsinking:

    • For high current applications, consider adding a heatsink or increasing the copper area on the PCB to enhance thermal dissipation.

13. Capacitor Selection:

    • Use X7R or C0G type ceramic capacitors for both input and output to ensure stability and low ESR (Equivalent Series Resistance).

By following these guidelines, you can ensure optimal performance and reliability of the NCP1207APG in your application.

(For reference only)