Details

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BUY NCP1117IST18T3G https://www.utsource.net/itm/p/12596507.html

Parameter	Symbol	Conditions	Min	Typ	Max	Unit
Input Voltage	VIN		4.5		20	V
Output Voltage	VOUT	Fixed		1.8		V
Output Current	IOUT	Continuous			1.0	A
Quiescent Current	IQ	VIN = 20V		6		mA
Dropout Voltage	VD	IOUT = 500mA		1.3		V
Line Regulation		VIN from 4.5 to 20V		0.02		%
Load Regulation		IOUT from 0 to 1A		0.5		%
Ripple Rejection		f = 120Hz		70		dB
Operating Temperature	TJ		-40		125	掳C
Storage Temperature	TSTG		-65		150	掳C

Instructions for Use:

1. Input Voltage (VIN):

   • Ensure the input voltage is within the specified range of 4.5V to 20V. Exceeding this range can damage the regulator.

2. Output Voltage (VOUT):

   • The NCP1117IST18T3G provides a fixed output voltage of 1.8V. No external components are required for setting the output voltage.

3. Output Current (IOUT):

   • The device can supply up to 1.0A continuously. Avoid exceeding this limit to prevent overheating and potential failure.

4. Quiescent Current (IQ):

   • Keep in mind the quiescent current of 6mA at an input voltage of 20V, which impacts overall power efficiency.

5. Dropout Voltage (VD):

   • The dropout voltage is 1.3V at 500mA load. Ensure that the input voltage is always higher than the sum of the output voltage and dropout voltage to maintain regulation.

6. Line and Load Regulation:

   • The line regulation is 0.02% over the input voltage range, and the load regulation is 0.5%. These parameters ensure stable output under varying conditions.

7. Ripple Rejection:

   • The device offers 70dB ripple rejection at 120Hz, providing clean output even with noisy inputs.

8. Operating and Storage Temperature:

   • Operate the device within the temperature range of -40掳C to 125掳C. Store it between -65掳C and 150掳C.

9. PCB Layout Considerations:

   • Place the input and output capacitors as close as possible to the regulator to minimize noise and improve stability.
   • Use wide traces for ground connections to reduce resistance and improve heat dissipation.

10. Capacitor Selection:

    • Choose input and output capacitors with appropriate ratings to ensure stability and performance. Typically, ceramic capacitors are recommended for their low ESR.

(For reference only)