Details

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BUY CPT40045 https://www.utsource.net/itm/p/10083632.html

Parameter	Description
Part Number	CPT40045
Type	Power Management IC
Function	Buck Converter
Input Voltage Range	2.7V to 5.5V
Output Voltage Range	Adjustable, typically 0.8V to VIN-0.6V
Switching Frequency	1.2MHz
Efficiency	Up to 95%
Load Current	Up to 2A continuous
Package	SOT-23-6
Operating Temperature	-40°C to +85°C
Protection Features	Overcurrent protection, thermal shutdown
Quiescent Current	25μA typical (at no load)

Instructions for Use:

1. Input Capacitor Selection: Choose a ceramic capacitor with low ESR and a voltage rating at least 1.2 times the maximum input voltage.
2. Output Capacitor Selection: Use a ceramic capacitor with a value between 1μF and 10μF to ensure stability.
3. Inductor Selection: Select an inductor with a saturation current greater than the maximum output current and a frequency response suitable for 1.2MHz operation.
4. Feedback Resistor Network: Adjust the feedback resistor network to set the desired output voltage according to the formula provided in the datasheet.
5. PCB Layout Considerations: Place the input and output capacitors as close as possible to the device. Keep the ground connections short and direct to minimize noise.
6. Thermal Considerations: Ensure adequate PCB copper area for heat dissipation if operating at high currents or temperatures.
7. Protection Circuitry: Verify that the input supply has appropriate transient suppression components to protect against voltage spikes.

For detailed design considerations and application circuits, refer to the full datasheet available from the manufacturer's website.

(For reference only)