LM25183NGUR

Voltage Regulators - DC DC Switching Regulators Overview

The LM25183NGUR is a primary-side regulation (PSR) flyback DC/DC converter featuring an integrated 65V, 2.5A power MOSFET. It operates with a wide input voltage range of 4.5V to 42V and supports output voltages up to 65V. The device utilizes boundary conduction mode (BCM) switching for high efficiency and compact magnetic design. Key electrical parameters include a maximum switch frequency of 350 kHz, quiescent current of 3 µA, and operation across a temperature range of -40°C to +150°C. It provides load and line regulation better than ±1.5% without requiring an optocoupler or auxiliary winding.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Eliminates the need for optocouplers or transformer auxiliary windings by sampling isolated output voltage via the primary-side flyback voltage.
• Integrates a 65V power MOSFET capable of delivering up to 10W output power, reducing component count and solution size.
• Optimized for low electromagnetic interference (EMI) with spread-spectrum capabilities meeting CISPR 32 requirements.
• Includes discontinuous mode overcurrent fault protection and optional external bias options to enhance system reliability.

Voltage Regulators - DC DC Switching Regulators Applications

• Isolated DC/DC power supplies for industrial equipment
• Adapter and charger designs for consumer electronics
• Battery chargers for portable devices

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix NGUR corresponds to the WSON-8 package and tape-and-reel configuration as listed in official Texas Instruments documentation. Confirm that the AEC-Q100 qualification status aligns with your automotive application requirements if applicable. Ensure compatibility with your PCB footprint for the WSON-8 package dimensions. Cross-reference the datasheet revision date to ensure all functional safety documentation and electrical characteristics are current before finalizing procurement.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when designing isolated flyback converters requiring high integration and minimal external components. It is suitable for applications needing efficient power conversion in the 10W range with strict EMI constraints. Consider the wide input voltage range for universal AC-DC adapter applications. Evaluate the thermal performance within the WSON-8 package against your expected power dissipation levels. Verify that the primary-side regulation accuracy meets the specific load regulation requirements of the target system.

Voltage Regulators - DC DC Switching Regulators Part Context

The LM25183 belongs to the LM2518x family of PSR flyback controllers from Texas Instruments. This series focuses on simplifying isolated power supply designs by integrating the power switch and control logic. The NGUR variant specifically denotes the surface-mount WSON-8 package format. It complements other non-isolated and isolated PMIC solutions offered by the manufacturer for diverse power management needs.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Check for direct pin-to-pin replacements within the LM2518x family or similar PSR flyback controllers from Texas Instruments. Verify that any substitute maintains the 65V MOSFET rating and 42V input limit. Ensure the replacement supports the required BCM operation and EMI filtering features. Confirm package compatibility and thermal characteristics match the original design constraints.