RP509Z312B-E2-F

Voltage Regulators - DC DC Switching Regulators Overview

The RP509Z312B-E2-F is a low-supply-current CMOS-based PWM/VFM step-down DC/DC converter with synchronous rectifier. It features an input voltage range of 2.3 V to 5.5 V and delivers up to 1 A output current. The device operates at a switching frequency of 6 MHz and provides a fixed output voltage of 3.1 V. It utilizes a WLCSP-6 package for high-density mounting. Key electrical parameters include a quiescent current of 15 uA, an operating temperature range of -40°C to +85°C, and integrated protection circuits including thermal shutdown and undervoltage lockout.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Synchronous rectification replaces diodes with built-in switching transistors to improve efficiency and reduce parts count.
• Auto-switching between PWM and VFM modes optimizes performance across load conditions while reducing noise in forced PWM mode.

Voltage Regulators - DC DC Switching Regulators Applications

• Portable electronic devices requiring compact power solutions
• Battery-powered systems needing efficient voltage regulation
• Space-constrained circuit designs utilizing small footprint packages

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix 'E2-F' corresponds to the required tape and reel packaging quantity of 5000 units. Confirm that the fixed 3.1 V output voltage aligns with the target system requirements. Ensure compatibility with the WLCSP-6 package soldering profile during assembly. Cross-reference the manufacturer part number against official Nisshinbo Micro Devices documentation to validate authenticity and revision status before procurement.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 3.1 V output is required from a 2.3 V to 5.5 V input source. Choose based on the need for high efficiency via synchronous rectification and low quiescent current for battery longevity. Consider the 6 MHz switching frequency for minimizing external passive component size. Evaluate the WLCSP-6 package constraints for PCB layout density and thermal management capabilities within the specified temperature range.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the RP509Z series of step-down DC/DC converters from Nisshinbo Micro Devices. The series is characterized by low supply current and high output current capabilities of 0.5 A or 1 A. It integrates essential protection features such as thermal shutdown and undervoltage lockout. The family supports both auto-switching and forced PWM control modes to adapt to varying load and noise sensitivity requirements.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Direct substitutes within the same series include RP509Z311D-E2-F (0.5A version) or RP509Z312B-E2-F variants with different output voltages if adjustable options are needed. Verify pin compatibility and thermal characteristics when considering alternative packages like SOT-89-5 found in other RP509x models.