CS5231-3GDF8

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Overview

The CS5231-3GDF8 is a linear regulator IC from onsemi that integrates a three-terminal regulator with circuitry to control an external PFET transistor, enabling management of two input supplies. It provides a regulated 3.3 V output with ±2.0% accuracy. The device draws 3.0 mA quiescent current at a 500 mA load and features fast transient response. Protection mechanisms include current limit protection and thermal shutdown with hysteresis. It supports reverse output currents up to 450 μA and ensures glitch-free transitions between the main 5.0 V supply and a 3.3 V auxiliary supply.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Feature Summary

• Integrates linear regulation with external PFET control for dual-supply management
• Provides glitch-free transition between main and auxiliary power sources
• Includes internal current limit protection and thermal shutdown with hysteresis

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Applications

• Systems requiring Intel Instantly Available power compliance
• Applications following Advanced Configuration and Power Interface (ACPI) standards
• Devices needing uninterrupted power during supply switching events

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Procurement Notes

Verify the specific suffix GDF8 against the manufacturer's official datasheet to confirm package type and temperature range. Ensure the external PFET selection matches the required load current and voltage ratings. Confirm compatibility with the target system's ACPI power management requirements before finalizing the design.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Selection Notes

Select this component when a single IC must manage both a primary 5.0 V rail and a secondary 3.3 V rail without interruption. It is suitable for designs prioritizing board space reduction by integrating bias networks and protection features. Verify that the external PFET can handle the peak load currents expected in the application.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Part Context

This part belongs to onsemi's family of linear regulators designed for system power management. It addresses the need for seamless power switching in portable and computing devices. The integration of control logic with the regulator simplifies the bill of materials compared to discrete solutions.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Replacement Considerations

Check for direct pin-compatible alternatives within the same series. Verify that any substitute maintains the 3.3 V output accuracy and glitch-free switching capability. Ensure the replacement supports the same external PFET control interface.