R1272S011A-E2-FE

Overview

The R1272S011A-E2-FE is a synchronous step-down DC/DC controller manufactured by Nisshinbo Micro Devices. It accepts an input voltage range of 4 V to 34 V and provides a positive output via external high- and low-side NMOS transistors. The device supports PWM and VFM operation modes with a switching frequency of 1 MHz. It features PLL synchronization capability for noise reduction in multi-unit systems. The controller operates within a temperature range of -40°C to +105°C and is housed in an HSOP-18 package.

Feature Summary

• Supports synchronous buck topology using external NMOS transistors
• Enables PLL synchronization to minimize system-wide electromagnetic interference
• Integrates current mode control for stable regulation under varying loads

Applications

• Industrial power supply systems requiring synchronized multi-phase designs
• Automotive electronics utilizing wide input voltage ranges
• Communication equipment needing low-noise DC/DC conversion

Procurement Notes

Verify the specific suffix 'E2-FE' against the official datasheet to confirm tape-and-reel packaging and lead-free status. Ensure the ordering code matches the exact pinout and thermal characteristics defined for the HSOP-18 package. Cross-reference the manufacturer's latest revision history to confirm component availability and compliance certifications before finalizing procurement orders.

Selection Notes

Select this controller when a wide input voltage range up to 34 V is required alongside precise PLL synchronization capabilities. It is suitable for applications demanding high efficiency through synchronous rectification and low electromagnetic interference via frequency alignment. Consider the external NMOS selection carefully to match the driver strength and switching speed requirements of the target application.

Part Context

This component belongs to the R1272S series of synchronous step-down DC/DC controllers from Nisshinbo Micro Devices. The series is designed for applications requiring robust performance across wide input voltage ranges. The R1272S family emphasizes noise reduction and efficiency, making it appropriate for sensitive electronic environments where power integrity and electromagnetic compatibility are critical design constraints.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.