Microchip Technology LM2575-3.3WU
| Quantity | Unit Price | Total Price |
|---|---|---|
| 1 | $5.32 | $5.32 |
| 15+ | $1.22 | $18.30 |
| 25+ | $1.20 | $30.00 |
| 50+ | $1.13 | $56.50 |
| 100+ | $1.00 | $100.00 |
| N+ | $0.20 | Price Inquiry |
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| Product attributes | Property Value |
| Manufacturer | Microchip Technology |
| Product Series | |
| Packaging | Tube | |
| Function | Step-Down |
| Output Configuration | Positive |
| Topology | Buck |
| Output Type | Fixed |
| Number of Outputs | 1 |
| Voltage - Input (Min) | 4V |
| Voltage - Input (Max) | 40V |
| Voltage - Output (Min/Fixed) | 3.3V |
| Voltage - Output (Max) | - |
| Current - Output | 1A |
| Frequency - Switching | 52kHz |
| Synchronous Rectifier | No |
| Operating Temperature | -40°C ~ 125°C (TJ) |
| Grade | - |
| Qualification | - |
| Mounting Type | Surface Mount |
| Package / Case | TO-263-6, D2PAK (5 Leads + Tab), TO-263BA |
| Supplier Device Package | TO-263-5 |
| ROHS |  |
The LM2575-3.3WU from Microchip Technology is a simple, high-efficiency step-down (Buck) DC-DC converter that provides a fixed 3.3V output. It accepts a wide input voltage from 4V to 40V and delivers up to 1A of load current. This device requires only a few external components, making it easy to design into automotive, industrial, and telecom systems. With a 52kHz switching frequency, it offers a good balance between efficiency and EMI performance. The TO-263 (D2PAK) package ensures excellent power dissipation for reliable operation.
- Wide Input Voltage Range (4V-40V): Handles automotive load dumps and industrial 24V rails without external protection circuitry.
- Simple, Robust Design: Requires minimal external components (inductor, diode, capacitors), reducing BOM cost and design time.
- Proven, Reliable Technology: Based on the industry-standard LM2575 family, known for its ruggedness and long-term availability.
- Excellent Thermal Performance: The D2PAK package efficiently dissipates heat, allowing full 1A output in high-temperature environments.
Automotive Power Supplies
The LM2575-3.3WU's wide 4V to 40V input range makes it suitable for automotive environments where battery voltage can vary significantly during cranking or load dumps. It provides a regulated 3.3V rail for sensors, ECUs, and infotainment systems.
Industrial Control Systems
In factory automation, 24V industrial buses are common. This buck converter can step down 24V to 3.3V for microcontrollers, PLCs, and HMI panels, offering a simple and reliable solution without needing a separate isolated supply.
Telecom and Networking Equipment
For networking gear powered from 12V or 24V backplanes, the LM2575-3.3WU provides a clean 3.3V rail for logic circuits, FPGAs, and interface transceivers. Its 52kHz frequency is well-suited for noise-sensitive analog sections.
Point-of-Load (POL) Regulation
When a system has a 12V or 24V main rail, this device can be used as a local POL regulator to generate 3.3V for digital ICs, reducing distribution losses and improving load regulation.
White Goods and Appliances
In washing machines, refrigerators, and air conditioners, the LM2575-3.3WU can derive a 3.3V logic supply from a 12V or 24V control board supply, providing a cost-effective and robust power solution.
- Q: What type of converter is the LM2575-3.3WU?
- A: It is a step-down (Buck) DC-DC converter.
- Q: What is the input voltage range?
- A: The input voltage range is 4V to 40V.
- Q: What is the fixed output voltage?
- A: The output voltage is fixed at 3.3V.
- Q: What is the maximum output current?
- A: It can deliver up to 1A of output current.
- Q: What is the switching frequency?
- A: The switching frequency is 52kHz.
- Q: What package is available?
- A: It is available in a TO-263-6 (D2PAK) package.
LM2575-3.3WU.pdf
- Q: What type of converter is the LM2575-3.3WU?
- A: It is a step-down (Buck) DC-DC converter.
- Q: What is the input voltage range?
- A: The input voltage range is 4V to 40V.
- Q: What is the fixed output voltage?
- A: The output voltage is fixed at 3.3V.
- Q: What is the maximum output current?
- A: It can deliver up to 1A of output current.
- Q: What is the switching frequency?
- A: The switching frequency is 52kHz.
- Q: What package is available?
- A: It is available in a TO-263-6 (D2PAK) package.
