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LMR36503R5URPER 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 5V 300MA 9VQFN. Review the specifications below when checking this part for your BOM.
Voltage Regulators - DC DC Switching Regulators specifications for LMR36503R5URPER
- Description：IC REG BUCK 5V 300MA 9VQFN
- Series：-
- 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)：3.6V
- Voltage - Input (Max)：65V
- Voltage - Output (Min/Fixed)：5V
- Voltage - Output (Max)：-
- Current - Output：300mA
- Frequency - Switching：200kHz ~ 2.2MHz
- Synchronous Rectifier：Yes
- Operating Temperature：-40°C ~ 150°C (TJ)
- Mounting Type：Surface Mount, Wettable Flank
- Package / Case：9-PowerVFQFN
- Supplier Device Package：9-VQFN-HR (2x2)
- Grade：-
- Qualification：-
Voltage Regulators - DC DC Switching Regulators datasheet and documents for LMR36503R5URPER
Voltage Regulators - DC DC Switching Regulators Overview
The LMR36503R5URPER is a synchronous step-down DC/DC converter from Texas Instruments. It operates with an input voltage range of 3 V to 65 V and provides a fixed output voltage of 5 V. The device supports a maximum output current of 300 mA. It features a low quiescent current of 4 uA and an adjustable switching frequency ranging from 400 kHz to 1 MHz. The component is housed in a VQFN-HR-9 package and functions within a temperature range of -40°C to +150°C.
Voltage Regulators - DC DC Switching Regulators Feature Summary
- Integrated synchronous buck topology for high efficiency
- Wide input voltage capability up to 65 V
- Ultra-low quiescent current for battery conservation
- Compact VQFN-HR-9 package design
Voltage Regulators - DC DC Switching Regulators Applications
- Industrial control systems
- Automotive electronics
- Point-of-load regulation
Voltage Regulators - DC DC Switching Regulators Procurement Notes
Verify the specific suffix R5U against official datasheets to confirm the fixed 5V output configuration. Ensure the VQFN-HR-9 package dimensions match your PCB footprint requirements. Confirm moisture sensitivity levels and reflow soldering profiles prior to assembly. Cross-reference the part number with manufacturer documentation to avoid confusion with adjustable variants.
Voltage Regulators - DC DC Switching Regulators Selection Notes
Select this model when a fixed 5V output is required from a wide input range. Compare output current capabilities against load demands, as this unit is rated for 300 mA. Consider the thermal performance of the VQFN-HR-9 package for your enclosure. Evaluate if the fixed frequency range meets EMI constraints compared to adjustable frequency options.
Voltage Regulators - DC DC Switching Regulators Part Context
This component belongs to the LMR36503 series of ultra-small synchronous buck converters. The series includes variants with different output voltages and frequencies. The R5U suffix specifically denotes the fixed 5V output version. It shares the same core architecture and package as other members in the family.
Voltage Regulators - DC DC Switching Regulators Replacement Considerations
LMR36503R5RPER is a confirmed substitute with identical electrical specifications and fixed 5V output. Verify package compatibility and pinout alignment before substitution.
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