Details

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BUY SM5847 https://www.utsource.net/itm/p/12605660.html

Parameter	Description
Part Number	SM5847
Type	Power Management IC
Function	Step-down (Buck) Converter
Input Voltage Range	2.7V to 5.5V
Output Voltage	Adjustable, typically 0.8V to 3.3V
Output Current	Up to 1A
Switching Frequency	1.2MHz
Package	SOT-23-6
Operating Temperature	-40掳C to +85掳C
Features	Built-in overcurrent protection, thermal shutdown, low quiescent current

Instructions for Use:

1. Circuit Design:

   • Ensure the input voltage is within the specified range of 2.7V to 5.5V.
   • Choose an appropriate inductor and output capacitor based on the desired output voltage and load conditions.

2. Output Voltage Setting:

   • The output voltage can be set using external resistors connected to the feedback pin (FB). Refer to the datasheet for specific resistor values.

3. Thermal Considerations:

   • Place the device on a PCB with adequate copper area or heat sink to ensure proper heat dissipation, especially under high load conditions.

4. Power-On Sequence:

   • Apply power to the input pin ensuring that it rises smoothly to avoid transient issues.
   • Verify that the output voltage stabilizes at the expected value.

5. Protection Circuits:

   • The SM5847 includes built-in overcurrent and thermal protection circuits which will automatically shut down the device if limits are exceeded.

6. Layout Guidelines:

   • Keep the power and ground traces as short and wide as possible to reduce noise and improve efficiency.
   • Position the input and output capacitors close to the device for better performance.

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

(For reference only)