Details

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BUY LM2575HVT-12/NOPB https://www.utsource.net/itm/p/9920941.html
IC REG BUCK 12V 1A TO220-5

Parameter	Symbol	Conditions	Min	Typ	Max	Unit
Input Voltage	VIN	Continuous	7	-	40	V
Output Voltage	VOUT	Fixed Output	-	12.0	-	V
Output Current	IOUT	Continuous	-	3.0	-	A
Switching Frequency	fSW	Typical Operation	-	52	-	kHz
Dropout Voltage	VDROPOUT	IOUT = 3A	-	1.5	-	V
Quiescent Current	IQ	VIN = 40V, No Load	-	5	-	mA
Efficiency	η	VIN = 24V, IOUT = 1A	-	82	-	%

Instructions for Use

1. Circuit Design:

   • Ensure the input voltage is within the specified range of 7V to 40V.
   • Connect a suitable output capacitor (typically 10μF to 100μF) between the output and ground to stabilize the output voltage.

2. Heat Management:

   • The LM2575HVT-12/NOPB can dissipate heat through its exposed pad. Ensure this pad is soldered to a large copper area on the PCB for efficient heat dissipation.

3. Component Selection:

   • Choose an inductor with a saturation current higher than the maximum load current and a low DC resistance to minimize losses.
   • Select input and output capacitors that can handle the ripple current at the switching frequency.

4. Layout Considerations:

   • Place components close to the regulator to minimize trace inductance, especially for the input capacitor and the diode.
   • Keep the loop area small to reduce noise and improve stability.

5. Testing and Troubleshooting:

   • Verify the output voltage using a multimeter to ensure it is stable at 12V.
   • Check the temperature of the regulator under load conditions to ensure it does not overheat.
   • If the output voltage is unstable or incorrect, check the connections and component values, particularly the inductor and capacitors.

(For reference only)