Details

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BUY LM2576D2T-ADJR4G https://www.utsource.net/itm/p/12529446.html

Parameter	Description	Value	Unit
Input Voltage (Min)	Minimum input voltage for stable operation	4.5	V
Input Voltage (Max)	Maximum input voltage	40	V
Output Voltage (Adj)	Adjustable output voltage range	1.23 to 37	V
Output Current (Max)	Maximum continuous output current	3	A
Switching Frequency	Internal oscillator frequency	52	kHz
Dropout Voltage	Voltage drop across regulator at full load	1.8	V
Quiescent Current	Current consumed by the regulator when idle	5	mA
Efficiency	Typical efficiency at 12V in, 5V out, 1A load	82	%
Package Type	Type of package	TO-220	-

Instructions for LM2576D2T-ADJR4G

1. Circuit Configuration:

   • Connect the input voltage to the VIN pin.
   • Place a capacitor between VIN and GND close to the IC to stabilize the input voltage.
   • Connect an inductor from the VOUT pin to the output capacitor.
   • Use a feedback resistor network between ADJ, VOUT, and GND to set the desired output voltage.

2. Output Voltage Adjustment:

   • The output voltage can be adjusted using the formula ( V_ = 1.23 times (1 + frac) ), where ( R_1 ) and ( R_2 ) are resistors connected to the ADJ pin.

3. Component Selection:

   • Choose an inductor with a saturation current higher than the maximum expected output current.
   • Select capacitors that have low ESR to ensure stable operation and efficient performance.

4. Thermal Considerations:

   • Ensure adequate heat sinking if operating at high currents or in high ambient temperatures to prevent overheating.

5. Layout Recommendations:

   • Keep the power loop area small to minimize noise and interference.
   • Place decoupling capacitors as close as possible to the IC pins.

6. Safety Precautions:

   • Always use proper insulation and protection devices in circuits dealing with high voltages.
   • Follow all manufacturer guidelines and datasheet recommendations for optimal performance and safety.

(For reference only)