LM2596 auxiliary power supply 3.3V, 5V, 12V, and adjustable output version Adjustable. Don’t miss out on the opportunity to create your own versatile and efficient voltage regulator circuit with the LM2596 auxiliary power supply. Whether you need a stable output of 3.3V, 5V, 12V, or an adjustable voltage, this IC has got you covered. With its wide input voltage range and excellent line load regulation, you can trust in the reliability and performance of your design. Download the PCB files, BOM, and notes today to get started on your next electronic project. Don’t wait, unleash your creativity and innovation with the LM2596 auxiliary power supply now!
Schematic LM2596 auxiliary power supply 3.3V 5V 12V Adj voltage
About IC LM2596
The LM2596 is a versatile and highly efficient voltage regulator integrated circuit that is commonly used in electronic projects and power supply designs. It is capable of converting input voltages between 4.5V and 40V to a stable output voltage in the range of 1.25V to 37V, making it ideal for a wide range of applications. The LM2596 is known for its high efficiency and low dropout voltage, allowing for minimal power dissipation and heat generation. Additionally, it features built-in overcurrent and thermal shutdown protection to ensure the safety and reliability of the circuit. Overall, the LM2596 is a popular choice for engineers and hobbyists looking to design efficient and reliable voltage regulation circuits.
LM2596 SIMPLE SWITCHER® Power Converter 150-kHz 3-A Step-Down Voltage Regulator datasheet (Rev. G)
LM2596 auxiliary power supply
- 3.3V, 5V, 12V, and adjustable output version Adjustable output
- voltage range: 1.2V~37V, ±4% maximum line load regulation and load regulation to ensure
- 3A output load current
- Wide input voltage range: 40V
- Only 4 external components required
- Excellent line load regulation
- Specifications 150 kHz fixed frequency internal crystal oscillator
- TTL shutdown function
- Low power standby mode, typical IQ 80 μA
- High efficiency using standard inductors
- Thermal shutdown and current limit protection
BOM LM2596 auxiliary power supply 3.3V 5V 12V Adj voltage
| Parts | Value | Description | Quantity |
| Capacitors | |||
| C1,C2,C3,C4,C6,C8,C5,C7 | 220uF | 220uF 25V SMD,D6.3xL7.7mm Aluminum Electrolytic Capacitor | 4 |
| C9,C12,C13,C16 | 100nF | C0603 – SMD ceramic capacitor | 4 |
| Resistors | |||
| R1 | 3.3kΩ | R0603 – SMD resistor | 1 |
| R2 | 5k | R0603 – SMD resistor | 1 |
| R3,R4 | 10K | R0603 – SMD resistor | 2 |
| R5 | 1K | R0603 – SMD resistor | 1 |
| Semiconductors | |||
| D1,D2,D3,D6 | SS34 | SMB Schottky diode | 4 |
| D5 | M7 | 1A diode | 1 |
| LED1,LED2,LED3,LED4 | LED Green | 0805 LED | 4 |
| U1 | LM2596S-5 | Step-down type Fixed 40V 5V 3A TO-263-5 DC-DC Converter | 1 |
| U2 | LM2596S-12 | Step-down type Fixed 40V 12V 3A TO-263-5 DC-DC Converter | 1 |
| U3 | LM2596S-ADJ | Step-down type adjustable 40V 3A TO-263-5 DC-DC Converter | 1 |
| U6 | LM2596S-3.3 | Step-down type Fixed 40V 3.3V 3A TO-263-5 DC-DC Converter | 1 |
| Miscellaneous | |||
| DC1 | DC-005A-20A | DC Power Connector | 1 |
| F1 | 5A | 5A 1812 Resettable Fuse | 1 |
| H1,H2,H3,H4,H5,H6,H7,H8 | HDR-M_2.54_1×5P | 1×5P 2.54 mm Pin Header | 8 |
| J1,J2,J3,J4 | B-2100S10P-B110 | 2×5P 2.54 mm Pin Header | 4 |
| L1,L2,L3,L4 | 33uh | CDRH74 SMD,7.3×7.3 mm Power Inductor | 4 |
| P1,P2,P3,P4,P5 | Terminal 2P | Terminal 2P | 5 |
| PR1 | 10 kΩ | 3296W trimpot | 1 |
| SW2 | SS-12D10L5 | Slide Switch SPDT | 1 |
Download files, links, and notes
- Download PCB in Gerber + BOM + Centroid file
- Mirror
- Buy LM2596
- LM2596 SIMPLE SWITCHER® Power Converter 150-kHz 3-A Step-Down Voltage Regulator datasheet (Rev. G)
- Semiconductor and IC Package Thermal Metrics (Rev. D)
- How to increase system reliability and simplify design using DC/DC converters
- The importance of accurate switching frequency and current limit when selecting bu
- Advantages of leaded packages in robust industrial designs
- Low EMI Layout Made SIMPLE With LM43600/1/2/3 and LM46000/1/2 (Rev. A)
- AN-2162 Simple Success With Conducted EMI From DC-DC Converters (Rev. C)
- AN-1081 Low-Cost Low-Parts-Count DC/DC Converter With Multiple Outputs (Rev. B)
- AN-1082 Adjust or Synchronize LM2586/88 Switching Frequency (Rev. B)
- AN-1149 Layout Guidelines for Switching Power Supplies (Rev. C)
- AN-1197 Selecting Inductors for Buck Converters (Rev. B)
- AN-1229 SIMPLE SWITCHER PCB Layout Guidelines (Rev. C)
- AN-1246 Stresses in Wide Input DC-DC Converters (Rev. C)
- AN-1520 A Guide to Board Layout for Best Thermal Resistance for Exposed Packages (Rev. B)
- AN-1566 Techniques for Thermal Analysis of Switching Power Supply Designs (Rev. A)
- AN-1889 How to Measure the Loop Transfer Function of Power Supplies (Rev. A)
- AN-2155 Layout Tips for EMI Reduction in DC/ DC Converters (Rev. A)
- Buck Converters Provide a Battery Charger and System Power
- Simple Techniques Minimize Cross-Coupling in Distributed Power Systems
- Input and Output Capacitor Selection
- SEM1600 Topic 4: Constructing Your Power Supply – Layout Considerations
- AN-643 EMI/RFI Board Design (Rev. B)
Source: https://oshwhub.com/azez/lm2596
