FAN23SV04TAMPX

Special Purpose Regulators Overview

The FAN23SV04TAMPX is a synchronous buck regulator designed for DDR termination. It operates with an input voltage range of 7 V to 18 V using the internal linear bias supply, or 4.5 V to 5.5 V when bypassing the internal regulator. The device delivers a continuous output current of 4 A with an adjustable output voltage from 500 mV to 1.5 V. It features a programmable switching frequency between 200 kHz and 1.5 MHz and a quiescent current of 18 uA. The component is housed in a 34-PQFN package and supports operation temperatures from -40°C to +125°C.

Special Purpose Regulators Feature Summary

• Integrates an internal 2:1 resistive divider for VDDQ inputs to reduce circuit size.
• Utilizes Fairchild constant on-time control structure for stable switching frequency and transient response.
• Includes configurable soft-start, adjustable absorption current limit, and low shutdown current.
• Provides comprehensive protection against overvoltage, thermal faults, and overcurrent conditions.

Special Purpose Regulators Applications

• DDR memory termination power rails
• Tracking applications requiring efficient voltage regulation
• Systems utilizing VDDQ input configurations

Special Purpose Regulators Procurement Notes

Verify component authenticity through authorized channels as this part is marked as obsolete by the manufacturer. Confirm specific ordering suffixes match exact package and tape/reel requirements. Check for updated part numbers within the onsemi portfolio due to Fairchild integration changes. Ensure compliance with RoHS and REACH standards before procurement.

Special Purpose Regulators Selection Notes

Select this regulator for applications requiring high efficiency and precise voltage tracking for DDR interfaces. Consider the internal bias supply limitations if input voltages fall below 7 V without bypassing. Evaluate thermal performance within the PQFN-34 package for the required 4 A load. Verify that the programmable frequency range aligns with EMI constraints and inductor selection.

Special Purpose Regulators Part Context

This component belongs to the TinyBuck integrated synchronous regulator family originally developed by Fairchild Semiconductor. Following corporate mergers, the product line is now managed under onsemi. The FAN23SV04TAMPX represents a specialized variant optimized for low-voltage, high-current memory termination tasks, distinguishing it from general-purpose buck regulators in the same series.

Special Purpose Regulators Replacement Considerations

FAN23SV06MPX

Special Purpose Regulators FAQ

How does the device handle input voltages below 7 V?

For input voltages between 4.5 V and 5.5 V, the VIN, P VIN, and P VCC pins must be connected together to bypass the internal linear regulator.

What protection mechanisms are included?

The device includes output overvoltage protection, thermal shutdown with hysteresis restart, and configurable absorption overcurrent protection.