NCP551SN50T1G: Top Choice in United States (USA) Utsource Holding Company Limited

Description

Parameter	Symbol	Min	Typ	Max	Unit	Conditions
Input Voltage	VIN	2.7	-	5.5	V
Output Voltage	VOUT	1.8	-	3.3	V	Adjustable
Quiescent Current	IQ	-	0.4	-	μA	No load
Load Regulation		-	0.5	-	%	0mA to 500mA
Line Regulation		-	0.05	-	%/V
Dropout Voltage	VDROPOUT	-	200	-	mV	@ 500mA
PSRR		-	65	-	dB	@ 1kHz
Operating Temperature	TOPR	-40	-	85	°C
Storage Temperature	TSTG	-65	-	150	°C

Power Supply Connection:
- Connect the input voltage (VIN) between the IN pin and GND.
- Ensure the input voltage is within the specified range of 2.7V to 5.5V.
Output Configuration:
- Adjust the output voltage using external resistors connected to the ADJ pin if not using fixed output versions.
- Verify the output voltage (VOUT) is within the required operating range of your application (1.8V to 3.3V).
Capacitor Selection:
- Use appropriate input and output capacitors to stabilize the regulator. Typically, ceramic capacitors with low ESR are recommended.
- For input capacitance, a minimum of 1μF is suggested.
- For output capacitance, use a value as per the datasheet recommendations to ensure stability.
Thermal Considerations:
- Ensure adequate heat dissipation if operating near the maximum current or in high ambient temperatures.
- The device can operate up to 85°C; beyond this, thermal shutdown may occur.
PCB Layout:
- Place the regulator close to the power plane to minimize noise.
- Keep the ground connections short and direct to reduce inductance and improve performance.
Testing and Verification:
- After assembly, test the regulator under various load conditions to ensure it meets the design specifications.
- Check for proper regulation, dropout voltage, and thermal stability.

(For reference only)