Details

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BUY LM2575T-5.0 https://www.utsource.net/itm/p/12357521.html

Parameter	Symbol	Min	Typical	Max	Unit
Input Voltage	VIN	7	-	40	V
Output Voltage (Fixed)	VOUT	-	5.0	-	V
Output Current	IOUT	-	3.0	-	A
Efficiency	畏	-	80	-	%
Switching Frequency	fSW	-	52	-	kHz
Dropout Voltage	VDROPOUT	-	1.9	-	V
Quiescent Current	IQ	-	5.0	-	mA
Load Regulation	-	-	0.5	-	%
Line Regulation	-	-	0.1	-	%/V
Ripple Rejection	-	-	60	-	dB
Operating Temperature Range	TOPR	-40	-	125	掳C
Storage Temperature Range	TSTG	-65	-	150	掳C

Instructions for Use:

1. Input Voltage (VIN):

   • The input voltage should be within the range of 7V to 40V.
   • Ensure that the input voltage is stable and does not exceed the maximum rating.

2. Output Voltage (VOUT):

   • The LM2575T-5.0 provides a fixed output voltage of 5.0V.
   • For adjustable versions, use an external resistor divider to set the desired output voltage.

3. Output Current (IOUT):

   • The device can deliver up to 3.0A of continuous output current.
   • Ensure that the load does not exceed this limit to avoid overheating or damage.

4. Efficiency (畏):

   • The typical efficiency is around 80%, but this can vary depending on the input voltage and load conditions.
   • Use appropriate heat sinking if operating at high power levels.

5. Switching Frequency (fSW):

   • The switching frequency is typically 52kHz.
   • This helps in reducing the size of external components like inductors and capacitors.

6. Dropout Voltage (VDROPOUT):

   • The dropout voltage is approximately 1.9V.
   • Ensure that the input voltage is at least 1.9V higher than the output voltage to maintain regulation.

7. Quiescent Current (IQ):

   • The quiescent current is typically 5.0mA.
   • This is the current consumed by the regulator when no load is present.

8. Load Regulation:

   • The load regulation is typically 0.5%.
   • This indicates how much the output voltage changes with varying load currents.

9. Line Regulation:

   • The line regulation is typically 0.1% per volt.
   • This indicates how much the output voltage changes with varying input voltages.

10. Ripple Rejection:

    • The ripple rejection is typically 60dB.
    • This indicates the ability of the regulator to reject input voltage ripple.

11. Operating Temperature Range (TOPR):

    • The operating temperature range is from -40掳C to 125掳C.
    • Ensure that the ambient temperature and heat dissipation are managed to keep the device within this range.

12. Storage Temperature Range (TSTG):

    • The storage temperature range is from -65掳C to 150掳C.
    • Store the device in a dry, cool place to prevent damage.

Additional Notes:

• Use a 100nF ceramic capacitor and a 10渭F electrolytic capacitor on the input side to filter out noise and ensure stability.
• Place a 100nF ceramic capacitor close to the output pin to improve transient response and stability.
• For best performance, use a 10渭H to 100渭H inductor in series with the output.
• Ensure proper PCB layout to minimize parasitic inductance and capacitance.

(For reference only)