Details

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BUY LM2596S-5.0 . https://www.utsource.net/itm/p/12608779.html

Parameter	Symbol	Min	Typical	Max	Unit
Input Voltage	VIN	4.5	-	40	V
Output Voltage	VOUT	-	5.0	-	V
Output Current	IOUT	-	3.0	-	A
Quiescent Current	IQ	-	5.0	-	mA
Dropout Voltage	VDROPOUT	-	1.2	-	V
Switching Frequency	fSW	-	150	-	kHz
Efficiency	畏	-	90	-	%
Operating Temperature	TOPR	-40	-	85	掳C
Storage Temperature	TSTG	-40	-	125	掳C

Instructions for Using the LM2596S-5.0

1. Input Voltage (VIN):

   • Ensure the input voltage is within the range of 4.5V to 40V.
   • Do not exceed the maximum input voltage to avoid damaging the device.

2. Output Voltage (VOUT):

   • The LM2596S-5.0 is pre-set to output 5.0V. No external components are required to set this voltage.
   • Verify the output voltage using a multimeter before connecting any load.

3. Output Current (IOUT):

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

4. Quiescent Current (IQ):

   • The quiescent current is typically 5.0mA, which is the current consumed by the regulator when no load is connected.

5. Dropout Voltage (VDROPOUT):

   • The dropout voltage is approximately 1.2V. This means the input voltage must be at least 1.2V higher than the output voltage for proper regulation.

6. Switching Frequency (fSW):

   • The switching frequency is fixed at 150kHz. This helps in selecting appropriate inductor and capacitor values for the external circuit.

7. Efficiency (畏):

   • The efficiency of the regulator is typically around 90%. This means that about 90% of the input power is converted to output power, with the remaining 10% lost as heat.

8. Operating Temperature (TOPR):

   • The device can operate within the temperature range of -40掳C to 85掳C.
   • Ensure adequate cooling if operating near the upper temperature limit.

9. Storage Temperature (TSTG):

   • The device can be stored between -40掳C and 125掳C without damage.

10. PCB Layout:

    • Use a good quality PCB with proper grounding and decoupling capacitors.
    • Place the input and output capacitors close to the regulator to minimize noise and improve stability.

11. Inductor Selection:

    • Choose an inductor with a saturation current higher than the maximum output current.
    • A typical value for the inductor is 100渭H, but this can vary based on specific application requirements.

12. Capacitor Selection:

    • Use a low ESR (Equivalent Series Resistance) capacitor for both input and output.
    • Typical values are 100渭F for the input and 100渭F for the output.

13. Thermal Considerations:

    • Ensure the regulator has adequate heat dissipation, especially when operating at high currents or in high ambient temperatures.
    • Consider using a heatsink if necessary.

By following these instructions, you can ensure optimal performance and reliability of the LM2596S-5.0 in your application.

(For reference only)