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5V To 3.3V-LM1117 copy

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1、Module description: LM1117 is a low dropout voltage regulator series. Its differential pressure in the 1.2V output, the load current is 1.2V when the load current is 800mA. It has the same tube feet as the national semiconductor industrial standard device LM317. LM1117 has an adjustable voltage version, through 2 external resistors can be achieved 1.25 ~ 13.8V output voltage range. In addition, there are 5 fixed voltage output (1.8V, 2.5V, 2.85V, 3.3V and 5V) model. LM1117 provides current limiting and thermal protection. The circuit includes a bandgap reference voltage of 1 Zener regulation to ensure the accuracy of output voltage is less than 1%. 2、Function Description: Realization of 3.3V to 5V voltage regulator. 3、Description of each function module:

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4、Components and PCB diagram before welding:

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5、Physical map after welding:

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5V转3.3V-LM1117 copy

5V转3.3V-LM1117 copy


ID Name Designator Footprint Quantity
1 LM1117 U1 SOT-223 1
2 0.1uF C1,C4 C-0603 2
3 16V/10uF C2,C3 16V/22uF 2
4 SIP2 P1,P2 HDR1X2 2
5 1k R1 3-0603 1
6 LED D1 L-0603 1




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