Microchip Technology LM2576-3.3WT
| 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 | 3A |
| Frequency - Switching | 52kHz |
| Synchronous Rectifier | No |
| Operating Temperature | -40°C ~ 125°C (TJ) |
| Grade | - |
| Qualification | - |
| Mounting Type | Through Hole |
| Package / Case | TO-220-5 |
| Supplier Device Package | TO-220-5 |
| ROHS |  |
The LM2576-3.3WT from Microchip Technology is a high-current step-down (Buck) DC-DC converter that delivers a fixed 3.3V output with up to 3A of load current. It accepts a wide input voltage from 4V to 40V, making it suitable for automotive, industrial, and networking applications. The device operates at a 52kHz switching frequency and is housed in a TO-220-5 package, which includes a metal tab for effective heat dissipation. This converter is a simple, reliable solution for generating high-current 3.3V rails from higher voltage supplies.
- High Output Current (3A): Capable of powering multiple digital ICs or a single high-power processor from a 3.3V rail.
- Wide Input Voltage Range (4V-40V): Suitable for automotive and industrial power buses with significant voltage fluctuations.
- Excellent Thermal Management: The TO-220 package with a metal tab allows for easy mounting on a heatsink, enabling full 3A output in high-temperature environments.
- Simple External Component Requirement: Only a few external parts are needed, simplifying PCB layout and reducing overall system cost.
High-Current 3.3V Rails in Industrial Equipment
The LM2576-3.3WT can supply up to 3A, making it ideal for powering FPGAs, DSPs, and multiple logic ICs in industrial controllers, PLCs, and robotics that require a robust 3.3V rail from a 12V or 24V supply.
Automotive Infotainment and Telematics
With a 4V to 40V input range, this converter handles automotive voltage transients. It provides a stable 3.3V supply for infotainment processors, GPS modules, and communication interfaces, ensuring reliable operation.
Networking and Communication Systems
In routers, switches, and base stations, the LM2576-3.3WT can power high-current digital loads such as ASICs and network processors. Its TO-220 package with a metal tab allows for easy heatsinking in high-power applications.
Point-of-Load (POL) for 5V to 3.3V Conversion
When a system has a 5V rail but needs a high-current 3.3V rail, this buck converter provides an efficient step-down solution, reducing power dissipation compared to linear regulators.
Battery-Powered Systems with Wide Voltage Variation
For equipment powered by lead-acid or multi-cell lithium batteries (e.g., 12V to 36V), the LM2576-3.3WT ensures a constant 3.3V output even as the battery voltage drops, maximizing usable battery capacity.
- Q: What type of converter is the LM2576-3.3WT?
- 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 3A 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-220-5 package.
LM2576-3.3WT.pdf
- Q: What type of converter is the LM2576-3.3WT?
- 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 3A 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-220-5 package.
