Texas Instruments LM2575S-3.3/NOPB
| Quantity | Unit Price | Total Price |
|---|---|---|
| 1 | $4.18 | $4.18 |
| 15+ | $4.05 | $60.75 |
| 25+ | $3.96 | $99.00 |
| 50+ | $3.74 | $187.00 |
| 100+ | $3.30 | $330.00 |
| N+ | $0.66 | Price Inquiry |
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| Product attributes | Property Value |
| Manufacturer | Texas Instruments |
| Product Series | SIMPLE SWITCHER® |
| 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 (DDPAK-5) |
| ROHS |  |
The LM2575S-3.3/NOPB is a fixed 3.3V output step-down buck converter from Texas Instruments. It operates from a wide input voltage of 4V to 40V and delivers up to 1A of continuous output current. With a fixed 52kHz switching frequency, it offers a simple, low-component-count design while maintaining high efficiency. The TO-263 (D2PAK) package provides excellent thermal dissipation, making it suitable for industrial, automotive, and networking applications where a reliable 3.3V rail is required.
- Fixed 3.3V Output: Eliminates external resistor dividers, simplifying design and reducing component count.
- Wide Input Range (4V-40V): Accommodates unregulated supplies and automotive load-dump conditions.
- 1A Output Current: Sufficient for most digital ICs, sensors, and auxiliary logic circuits.
- 52kHz Fixed Frequency: Enables small inductor sizes and predictable EMI filtering.
- Thermally Efficient Package: TO-263 D2PAK ensures low thermal resistance for high-temperature environments.
Microcontroller Power Supplies
Providing a stable 3.3V rail from a 5V to 40V source, this converter powers MCUs, DSPs, and digital logic in embedded systems with up to 1A load.
Automotive Sensors
Its 40V input tolerance makes it suitable for automotive sensor modules, converting battery voltage to a clean 3.3V supply for pressure, temperature, and position sensors.
Industrial Instrumentation
In factory automation, this fixed-output buck converter delivers reliable 3.3V power to field transmitters, data loggers, and process controllers operating from 24V rails.
Networking Equipment
For routers and switches, it steps down 12V or 24V backplane voltages to 3.3V for PHY chips, FPGAs, and control logic, ensuring low ripple and stable operation.
Consumer Electronics
In set-top boxes and gaming peripherals, the LM2575S-3.3 provides a cost-effective, high-efficiency solution for generating 3.3V from a 12V adapter.
- Q: What type of converter is the LM2575S-3.3/NOPB?
- A: It is a step-down (Buck) DC-DC converter with a fixed 3.3V output.
- 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: The maximum output current is 1A.
- Q: What is the switching frequency?
- A: The switching frequency is fixed at 52kHz.
- Q: What package is available?
- A: It comes in a TO-263-6 (D2PAK) package with 5 leads and a tab.
LM2575S-3.3/NOPB.pdf
- Q: What type of converter is the LM2575S-3.3/NOPB?
- A: It is a step-down (Buck) DC-DC converter with a fixed 3.3V output.
- 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: The maximum output current is 1A.
- Q: What is the switching frequency?
- A: The switching frequency is fixed at 52kHz.
- Q: What package is available?
- A: It comes in a TO-263-6 (D2PAK) package with 5 leads and a tab.
