Details

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BUY L1117-3.3 https://www.utsource.net/itm/p/12609589.html

Parameter	Symbol	Min	Typical	Max	Unit
Input Voltage	VI	4.5	-	20	V
Output Voltage	VO	-	3.3	-	V
Output Current	IO	-	1.0	1.5	A
Dropout Voltage	VD	-	1.0	1.7	V
Quiescent Current	IQ	-	5	10	mA
Line Regulation	-	-	0.01	-	%/V
Load Regulation	-	-	0.1	-	%
Ripple Rejection	-	-	60	80	dB
Operating Temperature	Toper	-40	-	125	掳C
Storage Temperature	Tstg	-65	-	150	掳C

Instructions for Using L1117-3.3

1. Input Voltage:

   • Ensure the input voltage is within the range of 4.5V to 20V.
   • The input voltage should be at least 1.7V higher than the output voltage (3.3V) to maintain regulation.

2. Output Voltage:

   • The L1117-3.3 provides a fixed output voltage of 3.3V.
   • Use appropriate capacitors on the input and output to stabilize the voltage and reduce ripple.

3. Output Current:

   • The regulator can provide up to 1.5A of current, with a typical output current of 1.0A.
   • Ensure the load does not exceed the maximum output current to avoid overheating or damage.

4. Capacitors:

   • Place a 10渭F tantalum or electrolytic capacitor on the input side to filter out noise and transients.
   • Place a 10渭F tantalum or electrolytic capacitor on the output side to stabilize the output voltage and improve transient response.

5. Thermal Management:

   • The L1117-3.3 can operate at temperatures from -40掳C to 125掳C.
   • For high current applications, ensure adequate heat dissipation by using a heatsink or thermal pad.

6. Mounting:

   • Mount the regulator on a PCB with good thermal conductivity to enhance heat dissipation.
   • Avoid placing the regulator near high-heat sources to prevent thermal overload.

7. Testing:

   • Before finalizing the design, test the circuit under various load conditions to ensure stable operation and proper regulation.
   • Measure the output voltage and current to verify that they meet the required specifications.

(For reference only)