Details

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BUY L4940V85 https://www.utsource.net/itm/p/11769936.html

Parameter	Symbol	Min	Typical	Max	Unit
Output Voltage	Vout	-	8.5	-	V
Input Voltage Range	Vin	9.3	-	30	V
Output Current (Max)	Iout	-	1.0	-	A
Quiescent Current	IQ	-	70	-	μA
Dropout Voltage	Vdo	-	1.3	-	V
Load Regulation	-	-	0.01	-	%
Line Regulation	-	-	0.01	-	%
Ripple Rejection	-	-	60	-	dB
Operating Temperature	Toper	-40	-	125	°C
Storage Temperature	Tstg	-65	-	150	°C

Instructions for Using L4940V85

1. Circuit Configuration:

   • Connect the input voltage (Vin) to the IN pin.
   • Connect the output voltage (Vout) to the OUT pin.
   • Ground the GND pin.

2. Capacitors:

   • Place a 100nF ceramic capacitor close to the IN pin to filter input noise.
   • Place a 10μF electrolytic capacitor close to the OUT pin to stabilize the output voltage.

3. Heat Dissipation:

   • Ensure adequate heat sinking if the device is operating at high currents or high ambient temperatures.
   • The maximum power dissipation (Pd) can be calculated using the formula: Pd = (Vin - Vout) * Iout.

4. Output Voltage Adjustment:

   • The L4940V85 is a fixed 8.5V regulator. For adjustable output voltages, consider using a different model in the L4940 series.

5. Overcurrent Protection:

   • The device has built-in overcurrent protection. If the current exceeds the rated output, the device will limit the current to protect itself.

6. Thermal Shutdown:

   • The regulator includes thermal shutdown protection to prevent damage from overheating. If the temperature exceeds the safe operating range, the device will shut down until it cools down.

7. Transient Response:

   • The regulator is designed to handle transient conditions, but ensure that the input voltage does not drop below the dropout voltage to maintain stable output.

8. Storage and Handling:

   • Store the device in a dry, cool place to avoid moisture damage.
   • Handle with care to avoid static discharge, which can damage the internal components.

(For reference only)