Step Up DC-DC Converter – 24V/10mA Output from 12V DC Input – Compatible to TO220 LDO

Rajkumar Sharma
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easy
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SKU: EL129411
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The project demonstrated here is a small-size solution, high-efficiency, low-cost, and low-EMI step-up DC/DC module for LDO regulator replacement. This small size module helps save on solution size and cost while also eliminating the need for a heatsink. The module takes up the same amount of space as a TO-220 package and is pin-to-pin compatible with TO-220 regulators, such as LM7805. The project is based on LM3578, which is a switching regulator that can easily be set up for such DC-to-DC voltage conversion circuits as the buck, boost, and inverting configurations. In this board, the chip is configured as a boost converter. Switching frequency sets at 100Khz. The project provides 24V output from 12V input. The project can output up to 20mA of current but it is safe to draw continuous 10mA.

Note: The PCB has the option to install THT or SMD inductor.

Features

Input Voltage V_IN = 12V DC
Output Voltage V_OUT= 24V DC
Load Current 10mA
Switching Frequency 100Khz
3 Pin Header Connector for Input and Output
Pin to Pin Compatible as LM7805
Output Ripple 60mV
PCB Dimensions 16.19 x 9.53 mm

Schematic

Parts List

NO	QNTY.	REF.	DESC.	MANUFACTURER	SUPPLIER	PART NO
1	1	CN1	3 PIN MALE HEADER PITCH 2.54MM	WURTH	DIGIKEY	732-5316-ND
2	1	C1	47uF/16V CERAMIC SMD SIZE 1210 OR 1206	MURATA/YAGEO	DIGIKEY
3	1	C2	22uF/35V CERAMIC SMD SIZE 1210 OR 1206	MURATA/YAGEO	DIGIKEY
4	1	C3	22PF/50V CERAMIC SMD SIZE 0805	MURATA/YAGEO	DIGIKEY
5	1	C4	680PF/50V CERAMIC SMD SIZE 0805	MURATA/YAGEO	DIGIKEY
6	1	D1	PMEG6010CEH SMD DIODE	NEXPERIA	DIGIKEY	1727-3848-1-ND
7	1	L1	470uH SMD OR THT 5MM-8MM	ALLIED	DIGIKEY	3475-PC0503-471K-RCTR-ND
8	1	R1	4.32K 1% SMD SIZE 0805	MURATA/YAGEO	DIGIKEY
9	1	R2	100K 1% SMD SIZE 0805	MURATA/YAGEO	DIGIKEY
10	1	U1	LM3578 SOIC8		DIGIKEY	296-35906-1-ND