Boost Converter – Input 3.3V, Output 5V@500mA
- Rajkumar Sharma
- 11 Views
- easy
- Tested
- SKU: EL153899
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The project presented here is a compact, high-efficiency, low-cost, and low-EMI step-up DC/DC module designed to replace LDO regulators. This small module not only saves on solution size and cost but also eliminates the need for a heatsink, occupying the same space as a TO-220 package and being pin-to-pin compatible with TO-220 regulators, such as LM78XX. The module is built using the NCV5173 chip, a 560kHz regulator with high efficiency, and a 1.5A integrated switch. The ICs employ a current mode architecture, ensuring excellent load and line regulation, as well as a practical means for current limiting. The combination of high-frequency operation and a highly integrated regulator circuit results in an extremely compact power supply solution. The circuit design includes provisions for features such as frequency synchronization, shutdown, and feedback controls for positive voltage regulation. The project delivers 5V DC at 500mA from a 3.3V input supply.
Features
- Input Supply 3.3V DC
- Output 5V DC
- Continuous Maximum Load Current 500mA
- Operating Frequency 560Khz
- Input and Output 3Pin Header Connector
- Direct Mount on TO220/LM78XX Regulator
- PCB Dimensions 16.03 x 12.02 mm
Schematic
Parts List
NO | QNTY. | REF. | DESC. | MANUFACTURER | SUPPLIER | SUPPLIER PART NO |
---|---|---|---|---|---|---|
1 | 1 | CN1 | 3 PIN MALE HEADER RIGHT ANGLE 2.54MM PITCH | WURTH | DIGIKEY | 732-5336-ND |
2 | 1 | C1 | 10nF/16V CERAMIC SMD SIZE 0805 | YAGEO/MURATA | DIGIKEY | |
3 | 1 | C2 | DNP | |||
4 | 2 | C3,C4 | 22uF/6.3V X5R CERAMIC SMD SIZE 0805 | YAGEO/MURATA | DIGIKEY | |
5 | 1 | D1 | MBRS120T /SS34 | ON SEMI | DIGIKEY | MBRS120T3GOSCT-ND |
6 | 1 | R1 | 3.6K 1% SMD SIZE 0805 | YAGEO/MURATA | DIGIKEY | |
7 | 1 | R2 | 4.99K 1% SMD SIZE 0805 | YAGEO/MURATA | DIGIKEY | |
8 | 1 | R3 | 1.21K 1% SMD SIZE 0805 | YAGEO/MURATA | DIGIKEY | |
9 | 1 | U1 | NCV5173 SOIC8 | ONSEMI | DIGIKEY | 488-NCV5173EDR2GCT-ND |
10 | 1 | L1 | 22uH 6-8MM | BOURNS | DIGIKEY | SRN6045TA-220MCT-ND |
Connections