Details

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BUY PS2651 https://www.utsource.net/itm/p/12606969.html

Parameter	Symbol	Min	Typical	Max	Unit
Supply Voltage	Vcc	4.5	5.0	5.5	V
Output Current	Iout	-	1.0	1.5	A
Efficiency	η	80	85	90	%
Switching Frequency	fsw	200	300	400	kHz
Quiescent Current	Iq	50	70	90	μA
Load Regulation	ΔVout	-	0.5	1.0	%
Line Regulation	ΔVout	-	0.3	0.6	%
Dropout Voltage	Vdo	0.5	1.0	1.5	V
Operating Temperature	Tj	-40	25	125	°C

Instructions for Use:

1. Supply Voltage (Vcc):

   • Ensure the supply voltage is within the range of 4.5V to 5.5V.
   • Avoid exceeding the maximum supply voltage to prevent damage to the device.

2. Output Current (Iout):

   • The typical output current is 1.0A, with a maximum of 1.5A.
   • Do not exceed the maximum output current to avoid overheating and potential failure.

3. Efficiency (η):

   • The efficiency ranges from 80% to 90%.
   • Optimize the circuit design to achieve higher efficiency.

4. Switching Frequency (fsw):

   • The switching frequency is typically 300kHz, with a range from 200kHz to 400kHz.
   • Adjust the external components to set the desired switching frequency.

5. Quiescent Current (Iq):

   • The quiescent current is typically 70μA, with a range from 50μA to 90μA.
   • Minimize quiescent current to reduce power loss.

6. Load Regulation (ΔVout):

   • The load regulation is typically 0.5%, with a range from 0.5% to 1.0%.
   • Ensure the load regulation meets the application requirements.

7. Line Regulation (ΔVout):

   • The line regulation is typically 0.3%, with a range from 0.3% to 0.6%.
   • Verify that the line regulation is suitable for the application.

8. Dropout Voltage (Vdo):

   • The dropout voltage is typically 1.0V, with a range from 0.5V to 1.5V.
   • Consider the dropout voltage when designing the power supply to ensure stable operation.

9. Operating Temperature (Tj):

   • The operating temperature range is from -40°C to 125°C.
   • Ensure the device operates within this temperature range to avoid thermal stress.

Additional Notes:

• Thermal Management:
  • Proper heat sinking or cooling mechanisms should be used if the device is expected to operate at high temperatures or under high load conditions.
• PCB Layout:
  • Follow recommended PCB layout guidelines to minimize noise and ensure optimal performance.
• Capacitors:
  • Use high-quality capacitors with appropriate ratings for input and output filtering to maintain stability and reduce ripple.
• Inductors:
  • Select inductors with low DC resistance and appropriate saturation current ratings to optimize efficiency and performance.

(For reference only)