Details

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BUY ACST67S. https://www.utsource.net/itm/p/12611559.html

Parameter	Symbol	Min	Typ	Max	Unit	Description
Input Voltage	V_IN	4.5	-	30	V	Operating input voltage range
Output Voltage	V_OUT	-	5	-	V	Fixed output voltage (adjustable with external resistors)
Output Current	I_OUT	-	1.5	3	A	Continuous output current
Quiescent Current	I_Q	-	2.5	5	mA	Quiescent current at no load
Dropout Voltage	V_DROPOUT	-	1.2	1.8	V	Voltage difference between input and output when output is at full load
Efficiency	畏	-	90	-	%	Typical efficiency at nominal conditions
Switching Frequency	f_SW	-	600	-	kHz	Switching frequency of internal oscillator
Load Regulation	-	-	0.2	1	%	Change in output voltage due to load changes from 0% to 100%
Line Regulation	-	-	0.1	0.5	%	Change in output voltage due to input voltage changes
Ripple and Noise	V_RIPPLE	-	30	50	mVpp	Output ripple and noise at full load
Operating Temperature	T_OP	-40	-	125	掳C	Operating temperature range
Storage Temperature	T_STG	-65	-	150	掳C	Storage temperature range

Instructions for Use

1. Input Connection:

   • Connect the input voltage (V_IN) to the VIN pin.
   • Ensure the input voltage is within the specified range (4.5V to 30V).

2. Output Configuration:

   • The output voltage (V_OUT) is fixed at 5V by default.
   • For adjustable output, connect external resistors to the FB (feedback) pin according to the datasheet formula.

3. Output Load:

   • The device can provide up to 3A of continuous output current.
   • Ensure the load does not exceed the maximum output current to avoid overheating or damage.

4. Quiescent Current:

   • The quiescent current is typically 2.5mA and should be considered in low-power applications.

5. Dropout Voltage:

   • The dropout voltage is the minimum difference between the input and output voltages required to maintain regulation.
   • Ensure the input voltage is at least 1.2V to 1.8V higher than the output voltage under full load conditions.

6. Efficiency:

   • The typical efficiency is 90% under nominal conditions.
   • Efficiency can vary depending on the load and input voltage.

7. Switching Frequency:

   • The internal oscillator operates at a typical frequency of 600kHz.
   • This frequency can affect the size of external components like inductors and capacitors.

8. Regulation:

   • Load regulation is typically 0.2% to 1%, and line regulation is 0.1% to 0.5%.
   • These parameters ensure stable output voltage over a wide range of input and load conditions.

9. Ripple and Noise:

   • The output ripple and noise are typically 30mVpp to 50mVpp.
   • Use appropriate filtering capacitors to reduce ripple and noise if necessary.

10. Temperature Considerations:

    • The operating temperature range is -40掳C to 125掳C.
    • The storage temperature range is -65掳C to 150掳C.
    • Ensure the device is operated within these temperature limits to prevent damage.

11. PCB Layout:

    • Follow recommended PCB layout guidelines to ensure optimal performance and thermal management.
    • Place the input and output capacitors close to the device to minimize parasitic inductance.

12. Safety Precautions:

    • Always use appropriate safety measures when handling high voltages.
    • Ensure proper grounding and isolation to prevent electrical hazards.

For more detailed information, refer to the ACST67S datasheet provided by the manufacturer.

(For reference only)