Details

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BUY SAM9703 https://www.utsource.net/itm/p/12591876.html

Parameter	Description	Value
Part Number		SAM9703
Type	High-Efficiency Step-Down DC-DC Converter
Input Voltage Range	Input voltage range for stable operation	4.5V to 60V
Output Voltage Range	Adjustable output voltage	0.8V to 5.5V
Output Current	Maximum continuous output current	3A
Switching Frequency	Internal switching frequency	650kHz
Efficiency	Typical efficiency at full load	Up to 95%
Package Type	Package type	SOIC-8
Operating Temperature	Operating temperature range	-40掳C to +125掳C
Protection Features	Built-in protection features	Overcurrent, Overvoltage, Thermal Shutdown
Quiescent Current	Quiescent current	30渭A (typical)
Shutdown Current	Shutdown current	<1渭A
Enable Pin	Enable control pin	Logic high to enable, logic low to disable
Soft-Start Time	Time to reach full output voltage after enabling	1ms (typical)

Instructions

1. Power Supply Connection:

   • Connect the input voltage to the VIN pin.
   • Connect the ground to the GND pin.

2. Output Voltage Setting:

   • Use an external resistor divider network between FB, VOUT, and GND to set the desired output voltage.
   • The output voltage can be calculated using the formula: [ V_{text} = V_{text} left(1 + fracright) ] where ( V_{text} ) is typically 0.8V.

3. Inductor Selection:

   • Choose an inductor with a value that provides stable operation within the specified input and output voltage ranges.
   • Recommended inductor values are typically between 4.7渭H and 10渭H.

4. Capacitor Selection:

   • Use a ceramic capacitor with low ESR for the input and output capacitors.
   • Typical values for input capacitance are 10渭F to 47渭F.
   • Typical values for output capacitance are 10渭F to 100渭F.

5. Enable Control:

   • Connect the EN pin to a logic high level to enable the converter.
   • Connect the EN pin to a logic low level to disable the converter and reduce power consumption.

6. Thermal Management:

   • Ensure adequate heat dissipation by providing a good thermal path to the PCB or using a heatsink if necessary.
   • Avoid operating the device at temperatures exceeding the maximum operating temperature.

7. Layout Considerations:

   • Place the input and output capacitors as close as possible to the VIN and VOUT pins to minimize parasitic inductance.
   • Keep the traces for high-frequency signals short and direct to reduce noise and improve stability.

8. Testing:

   • After assembly, test the output voltage and current to ensure the converter is functioning correctly.
   • Verify the efficiency and thermal performance under expected operating conditions.

For detailed application notes and further information, refer to the datasheet provided by the manufacturer.

(For reference only)