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Product Detailed Parameters
- Description：IC REG BUCK 12V 5A TO263
- Series：SIMPLE SWITCHER®
- Mfr：Texas Instruments
- Package：Tape & Reel (TR),Cut Tape (CT)
- Function：Step-Down
- Output Configuration：Positive
- Topology：Buck
- Output Type：Fixed
- Number of Outputs：1
- Voltage - Input (Min)：8V
- Voltage - Input (Max)：40V
- Voltage - Output (Min/Fixed)：12V
- Voltage - Output (Max)：-
- Current - Output：5A
- Frequency - Switching：260kHz
- Synchronous Rectifier：No
- Operating Temperature：-40°C ~ 125°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：TO-263-8, D2PAK (7 Leads + Tab), TO-263CA
- Supplier Device Package：TO-263 (DDPAK-7)
- Grade：-
- Qualification：-
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Overview
The LM2677SX-12 is a SIMPLE SWITCHER® step-down voltage regulator from Texas Instruments, operating at a fixed 260 kHz switching frequency. It provides a fixed 12 V output with a maximum load current of 5 A. The device accepts an input voltage range from 8 V to 40 V and utilizes a Buck topology. It is housed in a TO-263-7 (D2PAK) surface-mount package. The component supports operation across a temperature range of -40°C to +125°C junction temperature.
Feature Summary
- Integrated high-current power switch capable of delivering up to 5 A
- Fixed internal switching frequency eliminates external timing components
- Built-in thermal shutdown and current limit protection mechanisms
Applications
- Point-of-load regulation for industrial equipment
- Distribution power supplies requiring high efficiency
- Battery-powered systems needing efficient step-down conversion
Procurement Notes
Verify the specific suffix 'SX' against the manufacturer's official datasheet to confirm package type and tape-and-reel configuration. Ensure the part number matches the required 12 V fixed output variant. Cross-reference RoHS compliance status directly with the latest product documentation before procurement.
Selection Notes
Select this component when a fixed 12 V output is required without external feedback resistors. The 5 A current rating suits applications demanding significant load capacity. The 260 kHz frequency allows for smaller passive components compared to lower-frequency regulators. Verify that the input voltage remains within the 8 V to 40 V operational window.
Part Context
This part belongs to the LM2677 series of SIMPLE SWITCHER regulators, designed for high-efficiency DC-DC conversion. The series includes adjustable and fixed voltage variants. The LM2677 family is known for integrating the power switch and control logic into a single monolithic IC, simplifying design implementation for buck converter applications.
Replacement Considerations
Consult the manufacturer's replacement guide for verified equivalents. Direct substitutes may include other parts within the LM2677 family with compatible pinouts and electrical characteristics. Ensure any replacement maintains the same output voltage and current capabilities.
