Details

---

BUY SR4M4012 https://www.utsource.net/itm/p/9267234.html

Parameter	Symbol	Min	Typ	Max	Unit	Description
Input Voltage	VIN	2.7	-	5.5	V	Operating input voltage range
Output Voltage	VOUT	-	3.3	-	V	Fixed output voltage
Output Current	IOUT	-	400	-	mA	Maximum continuous output current
Quiescent Current	IQ	-	20	-	μA	Quiescent current at no load
Dropout Voltage	VD	-	120	-	mV	Dropout voltage at 400mA
Load Regulation	-	-	1%	-	%	Load regulation from 0 to 400mA
Line Regulation	-	-	0.5	-	%/V	Line regulation over input range
Ripple Rejection	-	50	60	70	dB	Power supply rejection ratio (PSRR)
Operating Temp	Toper	-40	-	85	°C	Operating temperature range
Storage Temp	Tstg	-40	-	125	°C	Storage temperature range

Instructions:

1. Input Voltage (VIN): Ensure the input voltage is within the specified range of 2.7V to 5.5V. Exceeding this range can damage the device.
2. Output Voltage (VOUT): The SR4M4012 provides a fixed output voltage of 3.3V. No external components are required for voltage setting.
3. Output Current (IOUT): The maximum continuous output current is 400mA. Avoid exceeding this limit to prevent overheating or damage.
4. Quiescent Current (IQ): The quiescent current is typically 20μA, which helps in maintaining low power consumption during no-load conditions.
5. Dropout Voltage (VD): The dropout voltage is 120mV at 400mA, ensuring efficient operation even when the input voltage is close to the output voltage.
6. Load Regulation: The load regulation is 1%, meaning the output voltage will vary by 1% over the entire load range from 0 to 400mA.
7. Line Regulation: The line regulation is 0.5% per volt, indicating the output voltage stability over the input voltage range.
8. Ripple Rejection (PSRR): The power supply rejection ratio (PSRR) ranges from 50dB to 70dB, effectively reducing input ripple and noise.
9. Operating Temperature (Toper): The device operates reliably within a temperature range of -40°C to 85°C.
10. Storage Temperature (Tstg): The device can be stored in temperatures ranging from -40°C to 125°C without damage.

Additional Notes:

• Capacitors: Use ceramic capacitors with low ESR for input and output filtering. Typical values are 1μF for input and 10μF for output.
• PCB Layout: Ensure proper PCB layout to minimize noise and improve thermal performance. Place the input and output capacitors as close as possible to the device.
• Thermal Considerations: If operating near the maximum output current, consider adding a heatsink or ensuring adequate airflow to dissipate heat.

(For reference only)