CS51313GD16

Special Purpose Regulators Overview

The CS51313GD16 is a synchronous dual N-channel MOSFET buck regulator controller designed for powering core logic in high-performance CPUs, specifically Intel Pentium II and Pro. It utilizes V2TM control topology to achieve fast transient response and precise regulation. The device integrates a 5-bit DAC with 1.2% tolerance, hiccup mode overcurrent protection, and adaptive voltage positioning. It operates with an input voltage range of 4.25V to 16V and provides a +1.23V reference voltage. The component is housed in a 16-SOIC package and supports operation within a temperature range of 0°C to 150°C TJ.

Special Purpose Regulators Feature Summary

• Implements V2TM control topology for rapid transient response and optimal regulation
• Integrates a 5-bit digital-to-analog converter with tight tolerance specifications
• Features adaptive voltage positioning and hiccup mode overcurrent protection
• Includes power-good output monitoring and under-voltage lockout via VCC monitor

Special Purpose Regulators Applications

• Intel Pentium II CPU core voltage regulation
• Intel Pentium Pro CPU core voltage regulation
• Synchronous switching regulator controllers for CPU VCORE

Special Purpose Regulators Procurement Notes

Verify the specific suffix GD16 against official onsemi documentation to confirm the 16-SOIC package configuration. Confirm that the component status aligns with current availability, as legacy CPU controllers may have limited active production support. Ensure compatibility with existing board designs requiring this specific pinout and control interface before procurement.

Special Purpose Regulators Selection Notes

Select this controller for applications requiring synchronous buck regulation for legacy Intel Pentium processors. The integrated DAC simplifies voltage adjustment compared to resistor-divider networks. Consider the thermal performance of the SOIC package and the need for external gate drivers if load currents exceed internal capabilities. Verify that the 4.25V to 16V input range matches the system power supply architecture.

Special Purpose Regulators Part Context

The CS51313 series belongs to onsemi's portfolio of specialized power management ICs targeting high-performance computing applications. This specific model is part of the CS5131x family, which focuses on providing highly integrated solutions for CPU core voltage regulation. The GD16 designation indicates the specific package type and tape/reel or tube configuration offered by the manufacturer for surface-mount assembly.

Special Purpose Regulators Replacement Considerations

Consult official onsemi substitution guides for direct replacements. Generic synchronous buck controllers may lack the specific V2TM control loop and CPU-specific protection features required for Pentium II/Pro platforms. Ensure any substitute maintains compatibility with the 16-SOIC footprint and electrical characteristics.