FAN23SV04TMPX

Special Purpose Regulators Overview

The FAN23SV04TMPX is a high-efficiency integrated synchronous buck regulator designed for DDR termination and tracking applications. It operates with an input voltage range of 7 V to 18 V using the internal linear bias regulator, or 4.5 V to 5.5 V when bypassing the internal regulator by connecting VIN, P VIN, and P VCC together. The device supports a continuous load current of 4 A and features an output voltage range from 0.5 V to 1.5 V. It utilizes a constant on-time control structure for excellent transient response and includes configurable switching frequencies between 200 kHz and 1.5 MHz.

Special Purpose Regulators Feature Summary

• Integrates an internal 2:1 resistive divider for VDDQ input to reduce circuit size
• Features Fairchild constant on-time control for stable switching frequency and fast transient response
• Includes programmable switching frequency and adjustable absorption current limit for flexible design
• Provides comprehensive protection via output overvoltage and thermal shutdown with hysteresis restart

Special Purpose Regulators Applications

• DDR termination power rails
• Tracking voltage regulation applications
• VDDQ supply generation

Special Purpose Regulators Procurement Notes

Verify the specific suffix TMPX against official documentation to confirm package type and tape-and-reel specifications. Ensure compatibility with ON Semiconductor ordering systems following the Fairchild integration, as part number nomenclature may have changed. Confirm RoHS compliance and halogen-free status if required by manufacturing standards. Cross-reference datasheet revisions to ensure all electrical parameters match the intended design requirements.

Special Purpose Regulators Selection Notes

Select this component when a compact solution for DDR termination is required with high efficiency. The internal bias regulator simplifies design for inputs above 7 V, while the bypass option suits 5 V systems. Consider the adjustable current limit and soft-start features for system protection. Verify that the required switching frequency falls within the 200 kHz to 1.5 MHz range and that the output voltage needs align with the 0.5 V to 1.5 V capability.

Special Purpose Regulators Part Context

This device belongs to the family of synchronous buck regulators optimized for memory interface power supplies. It addresses the need for precise voltage regulation in DDR applications where transient loads are significant. The integration of bias generation and control logic reduces the external component count compared to discrete solutions.

Special Purpose Regulators Replacement Considerations

Check for updated part numbers under ON Semiconductor branding due to corporate integration. Verify pinout and electrical parameter equivalence before substituting with other 4 A synchronous buck regulators.