Details

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BUY L9779WD-SPI https://www.utsource.net/itm/p/12608531.html

Parameter	Description	Value	Unit
Operating Voltage	Supply voltage range	2.7 to 5.5	V
Output Current	Maximum output current	1.5	A
Switching Frequency	Internal oscillator frequency	1.4	MHz
Quiescent Current	Current consumption in operation	60	渭A
Shutdown Current	Current consumption in shutdown mode	0.1	渭A
Efficiency	Typical efficiency at full load	95	%
Package Type	Physical package type	SOIC-8
Operating Temperature	Ambient temperature range for operation	-40 to 125	掳C
Protection Features	Built-in protection mechanisms	Overcurrent,
		Overtemperature

Instructions for L9779WD-SPI:

1. Power Supply Connection:

   • Connect the supply voltage (VIN) between the VIN pin and GND.
   • Ensure the supply voltage is within the specified operating voltage range of 2.7V to 5.5V.

2. Output Configuration:

   • Connect an external inductor and capacitor to the SW and GND pins for setting up the output stage.
   • Adjust the output voltage using feedback resistors connected to the FB pin.

3. Control Interface:

   • The SPI interface allows for configuration and monitoring of the device.
   • Use the SPI protocol to set parameters such as switching frequency and output voltage.

4. Thermal Considerations:

   • Ensure adequate heat dissipation if operating near maximum load conditions.
   • Place the device on a PCB with sufficient copper area or use a heatsink if necessary.

5. Protection Mechanisms:

   • The device includes overcurrent and overtemperature protection.
   • In case of fault conditions, the device will automatically shut down to prevent damage.

6. Shutdown Operation:

   • To put the device into a low-power shutdown mode, apply a logic low signal to the SHDN pin.
   • This reduces the current consumption to approximately 0.1 渭A.

7. Layout Recommendations:

   • Keep input and output capacitors close to the device to minimize noise and improve transient response.
   • Use short and wide traces for power connections to reduce parasitic inductance and resistance.

For detailed specifications and advanced configurations, refer to the datasheet provided by the manufacturer.

(For reference only)