RP503N121A5-TR-FE

Voltage Regulators - DC DC Switching Regulators Overview

The RP503N121A5-TR-FE is a synchronous buck DC-DC switching regulator from Nisshinbo Micro Devices. It operates with an input voltage range of 2.5V to 5.5V and provides a fixed 1.25V output at up to 600mA. The device integrates built-in switch tubes and supports PWM/VFM modes. It features a 2MHz switching frequency, enabling compact external component sizing. The IC is housed in an SOT-23-5 package and functions within a temperature range of -40°C to +85°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Synchronous rectification for high efficiency
• Integrated power switch elements
• Fixed output voltage configuration

Voltage Regulators - DC DC Switching Regulators Applications

• Portable electronic devices
• Battery-powered systems
• Embedded power management circuits

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix 'A5' against official datasheets to confirm the 1.25V fixed output variant. Ensure compatibility with SOT-23-5 footprints during PCB layout. Confirm operational temperature ratings match application requirements. Cross-reference manufacturer part numbers to avoid confusion with similar series models.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a compact synchronous buck solution is required for low-to-medium current loads. The 2MHz frequency allows for smaller inductors compared to lower-frequency alternatives. Verify that the 600mA output current meets system peak demands. Consider thermal dissipation capabilities within the SOT-23-5 package for the intended operating environment.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the RP503N series of switching regulators designed by Nisshinbo Micro Devices. The series focuses on efficient power conversion in small form factors. It serves as a power management integrated circuit (PMIC) suitable for modern portable electronics requiring stable voltage regulation from varying input sources.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Consult official manufacturer resources for direct replacements or pin-compatible alternatives.