Details

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BUY LM350T https://www.utsource.net/itm/p/12541488.html

Parameter	Symbol	Min	Typical	Max	Unit
Input Voltage	VIN	3.0	-	40.0	V
Output Voltage	VOUT	1.2	-	37.0	V
Output Current	IOUT	-	3.0	5.0	A
Dropout Voltage	VDROPOUT	-	2.0	-	V
Quiescent Current	IQ	-	5.0	-	mA
Thermal Resistance (Junction to Ambient)	RθJA	-	65.0	-	°C/W
Storage Temperature	TSTG	-65.0	-	150.0	°C
Operating Temperature	TOPR	-40.0	-	125.0	°C

Instructions for Using the LM350T:

1. Input Voltage:

   • Ensure the input voltage is within the range of 3.0V to 40.0V.
   • The input voltage must be at least 2.0V higher than the desired output voltage to maintain regulation.

2. Output Voltage:

   • The output voltage can be adjusted from 1.2V to 37.0V using external resistors.
   • Use the following formula to set the output voltage: [ V_ = 1.25 left(1 + fracright) ] where ( R_1 ) is the resistor connected between the output and adjust pins, and ( R_2 ) is the resistor connected between the adjust pin and ground.

3. Output Current:

   • The LM350T can provide up to 5.0A of output current, with a typical current of 3.0A.
   • Ensure proper heat sinking if operating at high currents to prevent overheating.

4. Thermal Management:

   • The thermal resistance from the junction to ambient is 65°C/W.
   • Use a heatsink to keep the device temperature within safe limits, especially when operating at high power dissipation.

5. Capacitors:

   • Place a 0.1μF ceramic capacitor close to the input pin to filter out noise.
   • A 10μF electrolytic capacitor on the output pin helps stabilize the output voltage and improve transient response.

6. Storage and Operating Temperature:

   • Store the device between -65°C and 150°C.
   • Operate the device between -40°C and 125°C to ensure reliable performance.

7. Layout Considerations:

   • Keep the traces between the input, output, and ground as short as possible to minimize parasitic inductance and resistance.
   • Use wide traces for the output to handle high currents efficiently.

8. Protection:

   • The LM350T includes internal overcurrent and thermal shutdown protection.
   • However, it is recommended to add external fuses or current-limiting resistors for additional safety.

9. Adjust Pin:

   • The adjust pin is used to set the output voltage. Ensure it is properly biased and not left floating.
   • A small current (typically 50μA) flows out of the adjust pin, which should be accounted for in the resistor calculations.

10. Testing:

    • Before finalizing the design, test the circuit under various load conditions to ensure stable operation and correct output voltage.

(For reference only)