Microchip Technology MIC4575-3.3WU-TR
| Quantity | Unit Price | Total Price |
|---|---|---|
| 1 | $13.08 | $13.08 |
| 15+ | $3.01 | $45.15 |
| 25+ | $2.94 | $73.50 |
| 50+ | $2.78 | $139.00 |
| 100+ | $2.45 | $245.00 |
| N+ | $0.49 | Price Inquiry |
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| Product attributes | Property Value |
| Manufacturer | Microchip Technology |
| Product Series | |
| Packaging | Tape & Reel (TR) | |
| Function | Step-Down, Step-Up/Step-Down |
| Output Configuration | Positive |
| Topology | Buck, Buck-Boost |
| Output Type | Fixed |
| Number of Outputs | 1 |
| Voltage - Input (Min) | 4V |
| Voltage - Input (Max) | 24V |
| Voltage - Output (Min/Fixed) | 3.3V |
| Voltage - Output (Max) | - |
| Current - Output | 1.7A (Switch) |
| Frequency - Switching | 200kHz |
| Synchronous Rectifier | No |
| Operating Temperature | -40°C ~ 85°C (TA) |
| 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 MIC4575-3.3WU is a versatile step-down switching regulator from Microchip Technology, designed to deliver a fixed 3.3V output from input voltages between 4V and 24V. Capable of handling up to 1.7A of switch current, it operates at a fixed 200kHz switching frequency, balancing efficiency with component size. Its TO-263-6 (D2PAK) package supports excellent thermal performance, making it suitable for industrial, automotive, and telecom applications where reliable power conversion is critical.
- Wide Input Flexibility: Accepts 4V to 24V inputs, supporting multi-rail systems and automotive environments.
- High Current Capability: 1.7A switch current handles demanding loads without external pass transistors.
- Stable 200kHz Operation: Reduces output ripple and allows for smaller external inductor and capacitor values.
- Buck-Boost Configurability: Offers design flexibility for applications with fluctuating input voltages.
- Robust Package: TO-263-6 D2PAK ensures efficient heat dissipation for reliable long-term operation.
Battery-Powered Industrial Equipment
With a wide 4V to 24V input range and 200kHz switching frequency, this regulator efficiently steps down battery voltages to a stable 3.3V rail for microcontrollers and sensors in portable industrial tools.
Automotive Infotainment Systems
The 24V maximum input accommodates automotive electrical systems, providing a regulated 3.3V supply for logic circuits, audio processors, and display drivers while maintaining high efficiency.
Telecom and Networking Power Rails
In networking equipment with 12V or 24V buses, the MIC4575-3.3WU delivers a clean 3.3V output for FPGA I/O, memory, and interface ICs, reducing heat with its 200kHz operation.
Point-of-Load (POL) Conversion
For distributed power architectures, this buck converter provides a local 3.3V rail from a higher intermediate bus, minimizing board space with its compact D2PAK package.
Buck-Boost Configurations for Unregulated Supplies
When input voltage can fluctuate above or below 3.3V, the device can be configured in a Buck-Boost topology to maintain a constant output, ideal for battery systems with wide discharge curves.
HVAC and Building Automation
In 24V-powered HVAC controllers, the regulator steps down to 3.3V for digital control logic, offering reliable operation across the full input range without external LDOs.
- Q: What type of converter is the MIC4575-3.3WU?
- A: It is a step-down (Buck) switching regulator that can also be configured for Buck-Boost operation.
- Q: What is the input voltage range?
- A: The input voltage range is from 4V to 24V.
- Q: What is the output voltage?
- A: The fixed output voltage is 3.3V.
- Q: What is the maximum switch current?
- A: The maximum switch current is 1.7A.
- Q: What is the switching frequency?
- A: The switching frequency is 200kHz.
- Q: What package is available?
- A: It comes in a TO-263-6 (D2PAK) package with 5 leads plus tab.
MIC4575-3.3WU-TR.pdf
- Q: What type of converter is the MIC4575-3.3WU?
- A: It is a step-down (Buck) switching regulator that can also be configured for Buck-Boost operation.
- Q: What is the input voltage range?
- A: The input voltage range is from 4V to 24V.
- Q: What is the output voltage?
- A: The fixed output voltage is 3.3V.
- Q: What is the maximum switch current?
- A: The maximum switch current is 1.7A.
- Q: What is the switching frequency?
- A: The switching frequency is 200kHz.
- Q: What package is available?
- A: It comes in a TO-263-6 (D2PAK) package with 5 leads plus tab.
