R1272S001A-E2-YE

Overview

The R1272S001A-E2-YE is a synchronous step-down DC-DC controller IC from Nisshinbo Micro Devices. It accepts an input voltage range of 4V to 34V and operates with a switching frequency between 250kHz and 1MHz. The device supports PLL synchronization for clock alignment. It drives external high-side and low-side NMOS transistors to generate a positive output buck regulator. This component is designed for power management applications requiring efficient voltage conversion.

Feature Summary

• Supports synchronous rectification by driving external NMOS transistors
• Enables PLL synchronization for precise clock alignment
• Operates within a wide input voltage range up to 34V

Applications

• Positive output buck regulator systems
• Power management units requiring synchronized clocks
• Automotive electronic control modules

Procurement Notes

Verify the specific suffix 'YE' against official Nisshinbo documentation to confirm package type and tape/reel specifications. Ensure compatibility with external MOSFET selection based on the 34V input rating. Confirm that the required switching frequency range aligns with system design constraints before finalizing procurement orders.

Selection Notes

Select this controller when a synchronous buck topology is required with external drive capability. Consider the 4V to 34V input window and the need for PLL synchronization in multi-rail systems. Evaluate thermal performance requirements for the HSOP-8E or LFSOP package depending on the specific variant configuration and ambient operating conditions.

Part Context

This component belongs to the R1272S series of synchronous step-down controllers. The series is characterized by its ability to manage high-voltage inputs and support external power stages. It serves as a core power management element in systems demanding regulated DC-DC conversion with flexible switching frequency options.

Replacement Considerations

Check datasheets for compatible alternatives such as the R1272S001A-E2-FE, noting potential differences in packaging or reel specifications. Verify electrical parameter equivalence regarding input voltage limits and synchronization capabilities before substitution.