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LM2676S-3.3
+StücklisteLM2676 SIMPLE SWITCHER 8V TO 40V
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HerstellerTexas Instruments
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Herstellerteil #LM2676S-3.3
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Datenblatt LM2676S-3.3 DataSheet
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Paket TO-263-7
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Auf Lager4957
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Spezifikationen
| Attribut | Wert |
| Package | Bulk |
| Series | SIMPLE SWITCHER® |
| ProductStatus | Active |
| Function | Step-Down |
| OutputConfiguration | Positive |
| Topology | Buck |
| OutputType | Fixed |
| NumberofOutputs | 1 |
| Voltage-Input(Min) | 8V |
| Voltage-Input(Max) | 40V |
| Voltage-Output(Min/Fixed) | 3.3V |
| Current-Output | 3A |
| Frequency-Switching | 260kHz |
| SynchronousRectifier | No |
| OperatingTemperature | -40°C ~ 125°C (TJ) |
| MountingType | Surface Mount |
| Package/Case | TO-263-8, D²Pak (7 Leads + Tab), TO-263CA |
Übersicht
Description
Key features of the LM2676S-3.3 include high efficiency, typically above 90%, due to its use of a switching mode design, and a simple, easy-to-use architecture that requires minimal external components. This regulator also integrates protection features such as thermal shutdown and current limiting, enhancing reliability and safety in operation. The LM2676S-3.3 is ideal for applications like battery-powered devices, embedded systems, and distributed power systems where a dependable 3.3V supply is needed. Its ease of use and robust performance make it a popular choice among engineers and designers.
Equivalent
1. LM2576-3.3: Another step-down regulator from the same family with similar specifications.
2. L4973V3.3: From STMicroelectronics, offering similar functionality.
3. MC34063: A versatile DC-DC converter that can be configured for similar applications.
4. TPS5430: From Texas Instruments, offering 3 A output with adjustable output voltage.
5. MP1584EN: From Monolithic Power Systems, a compact step-down regulator.
Always verify pin compatibility and electrical characteristics before replacing.
Features
1. Output Voltage: Fixed output voltage of 3.3V.
2. Input Voltage Range: Operates effectively over a wide input voltage range from 8V to 40V.
3. Output Current: Capable of delivering up to 3A continuous output current.
4. Efficiency: High efficiency, typically up to 90%, due to its design and low on-resistance switches.
5. Switching Frequency: Operates at a fixed frequency of 260 kHz, reducing the size of external components.
6. Thermal Protection: Built-in thermal shutdown and current limiting features for safety and reliability.
7. Soft Start: Integrated soft-start function to minimize inrush current during startup.
8. Package: Available in a TO-263 (surface-mount) package.
9. Low Component Count: Requires fewer external components, simplifying circuit design.
Overall, the LM2676S-3.3 is well-suited for applications requiring reliable, efficient step-down voltage conversion with minimal external components and robust protection features.
Pinout
1. VIN: Input voltage supply pin. Connects to the input voltage source.
2. GND: Ground pin. Common ground for both input and output voltages.
3. SW: Switch output pin. Connects to the inductor in the buck configuration.
4. FB: Feedback pin. For the fixed output version like the LM2676S-3.3, this pin may be internally connected for feedback.
5. ON/OFF: Enable pin. This pin is used to turn the regulator on or off. A low logic level turns the device off, while a high logic level turns it on.
These pin functions allow the LM2676S-3.3 to efficiently convert a higher input voltage to a stable 3.3V output, suitable for powering various digital circuits and systems.
Manufacturer
Application
1. Embedded Systems: Provides stable 3.3V power for microcontrollers and peripherals.
2. Industrial Automation: Powers sensors and control systems requiring reliable DC voltage.
3. Consumer Electronics: Used in devices like set-top boxes, routers, and modems.
4. Communication Equipment: Supplies regulated power for RF modules and networking devices.
5. Automotive Systems: Used in infotainment systems and vehicle electronics requiring consistent power supply.
Its features like high efficiency and low dropout make it suitable for these applications.