Details

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BUY LM317L https://www.utsource.net/itm/p/12541651.html

Parameter	Symbol	Min	Typical	Max	Unit
Input Voltage	VIN	3.0	-	40	V
Output Voltage	VOUT	1.25	-	37	V
Dropout Voltage	VD	1.0	1.5	2.5	V
Output Current	IOUT	0.01	-	0.1	A
Quiescent Current	IQ	2.5	5	10	mA
Load Regulation		0.01	-	1.0	%
Line Regulation		0.01	-	0.1	%
Temperature Coefficient		0.005	-	0.1	%/°C
Operating Junction Temp.	TJ	-40	-	125	°C
Storage Temperature	TSTG	-65	-	150	°C

Instructions for Using LM317L:

1. Circuit Configuration:

   • Connect the input voltage (VIN) to the input pin.
   • Connect the output voltage (VOUT) to the output pin.
   • Connect the adjustment pin (ADJ) to a voltage divider formed by two resistors (R1 and R2).

2. Output Voltage Calculation:

   • The output voltage can be calculated using the formula: [ V_ = 1.25 left(1 + fracright) + I_ cdot R2 ]
   • For most applications, (I_) is very small (approximately 50 μA) and can often be neglected.

3. Capacitor Recommendations:

   • Place a 1 μF tantalum capacitor between the input and ground to improve transient response and stability.
   • Optionally, place a 10 μF electrolytic capacitor between the output and ground to further improve stability and reduce ripple.

4. Thermal Considerations:

   • Ensure adequate heat sinking if the device is operating at high power levels or in high ambient temperatures.
   • The maximum power dissipation is given by: [ P_ = (V_ - V_) times I_ ]

5. Protection:

   • The LM317L has internal thermal overload protection and safe-area compensation.
   • External diodes may be required to protect against reverse polarity and transient voltages.

6. Layout Guidelines:

   • Keep leads short and use wide traces for power connections to minimize inductance and resistance.
   • Place bypass capacitors close to the device to ensure stable operation.

7. Storage and Handling:

   • Store in a dry environment and handle with care to avoid damage from electrostatic discharge (ESD).

(For reference only)