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LMR51440SDRRR is listed in the Voltage Regulators - DC DC Switching Regulators range at ChipApex. The manufacturer field lists Texas Instruments. Its product description is IC REG BUCK ADJ 4A 12WSON. Review the specifications below when checking this part for your BOM.
Voltage Regulators - DC DC Switching Regulators specifications for LMR51440SDRRR
- Description：IC REG BUCK ADJ 4A 12WSON
- Series：-
- Mfr：Texas Instruments
- Package：Tape & Reel (TR),Cut Tape (CT)
- Function：Step-Down
- Output Configuration：Positive
- Topology：Buck
- Output Type：Adjustable
- Number of Outputs：1
- Voltage - Input (Min)：4V
- Voltage - Input (Max)：36V
- Voltage - Output (Min/Fixed)：0.8V
- Voltage - Output (Max)：28V
- Current - Output：4A
- Frequency - Switching：200kHz ~ 1.1MHz
- Synchronous Rectifier：Yes
- Operating Temperature：-40°C ~ 150°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：12-WFDFN Exposed Pad
- Supplier Device Package：12-WSON (3x3)
- Grade：-
- Qualification：-
Voltage Regulators - DC DC Switching Regulators datasheet and documents for LMR51440SDRRR
Voltage Regulators - DC DC Switching Regulators Overview
The LMR51440SDRRR is a 36-V, 4-A synchronous buck converter from Texas Instruments. It operates with an input voltage range of 4 V to 36 V and provides a positive adjustable output starting at 0.8 V. The device features a fixed switching frequency of 1.1 MHz and utilizes a 12-WFDFN package with an exposed pad. Quiescent current specifications include 25 uA typical and 35 uA operating supply current. It supports operation temperatures from -40°C to +150°C.
Voltage Regulators - DC DC Switching Regulators Feature Summary
- Functional safety capable with documentation available for system design
- Configured for rugged industrial applications
- Integrated synchronous rectification for high efficiency
Voltage Regulators - DC DC Switching Regulators Applications
- Industrial automation systems
- Automotive electronics
- Point-of-load regulation
Voltage Regulators - DC DC Switching Regulators Procurement Notes
Verify the complete part number including suffixes against official Texas Instruments documentation to ensure correct package type and temperature rating. Confirm functional safety certification requirements if applicable to your specific design implementation. Cross-reference datasheet revisions to ensure compatibility with existing board layouts and component selections.
Voltage Regulators - DC DC Switching Regulators Selection Notes
Select this component when a 36-V input capability and 4-A continuous output current are required in a compact footprint. The 1.1 MHz switching frequency allows for smaller external passive components compared to lower-frequency alternatives. Ensure thermal management strategies account for the WSON-12 package characteristics under maximum load conditions.
Voltage Regulators - DC DC Switching Regulators Part Context
This device belongs to the LMR514x0 family of synchronous step-down DC/DC converters. The family includes variants with different current ratings, such as the 5-A LMR51450. These converters are designed to provide robust performance in demanding environments while maintaining low quiescent current for improved efficiency during light-load conditions.
Voltage Regulators - DC DC Switching Regulators Replacement Considerations
The LMR51450FNDRRR is a documented member of the same LMR514x0 family offering 5-A output current. Verify pinout compatibility and thermal performance differences before substitution. Check specific ordering suffixes to confirm package and tape/reel specifications match the target application requirements.
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