CS5231-3GDF8

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

The CS5231-3GDF8 is a 500 mA linear regulator with auxiliary control, providing a 3.3 V ± 2.0% output. It features 3.0 mA quiescent current at full load and includes current limit protection and thermal shutdown with hysteresis. The device manages two input supplies, switching between a main 5.0 V supply and a 3.3 V auxiliary source to ensure uninterrupted power. It exhibits fast transient response and limits reverse output current to 450 μA.

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

• Integrates a three-terminal linear regulator with circuitry for controlling an external PFET transistor.
• Manages dual input supplies to deliver constant, uninterrupted power to the load.
• Provides glitch-free transition between the main 5.0 V supply and the 3.3 V auxiliary supply.

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

• Systems requiring Intel Instantly Available power management compliant with ACPI standards.
• Applications needing seamless power switching between primary and auxiliary voltage sources.
• Portable electronics requiring uninterrupted operation during power source transitions.

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 ordering part number matches the exact electrical specifications required for your design. Cross-reference with authorized distributors to confirm availability and authenticity of the component.

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

Select this component when designing systems that require a regulated 3.3 V output from a 5.0 V rail while maintaining power continuity via an auxiliary supply. It is suitable for applications demanding low quiescent current and protection against over-current and overheating conditions without complex external biasing networks.

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

This device belongs to the family of linear regulators with auxiliary control capabilities. It is designed to meet specific industry power management standards, such as those defined by Intel and Microsoft for portable computing devices. The integration of PFET control simplifies the design of dual-supply systems.

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

Check for direct pin-compatible alternatives with identical 3.3 V output and auxiliary control features. Verify that any substitute maintains the same 500 mA current capability and meets the same ACPI compliance requirements. Ensure thermal and electrical characteristics match the original specification.