CS5233-3GDPR5

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

The CS5233-3GDPR5 is a dual-input linear regulator manufactured by onsemi, providing a fixed 3.3 V output with ±2% accuracy. It supports up to 1.5 A from the VIN source and 500 mA from the VSB source in the D2PAK-5 package. The device features an auxiliary drive control for external PFET switching, glitch-free transitions between three power sources (VIN, VSB, 3.3 V AUX), and reverse current protection. Electrical characteristics include a thermal shutdown threshold of 180°C with 25°C hysteresis, current limits of 3.0 A (VIN) or 800 mA (VSB), and an AuxDrv peak voltage of 4.0 V.

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

• Glitch-free transition between multiple input supplies including main, standby, and auxiliary rails
• Auxiliary drive control enables external PFET switching when primary inputs are absent
• Composite NPN-PNP pass transistor design ensures low dropout voltage and reduced supply current
• Integrated protection mechanisms include current limiting and thermal shutdown with hysteresis

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

• PCI Network Interface Cards (NICs) requiring Instantly Available power per ACPI standards
• Desktop computer power management systems
• PCMCIA interface cards with multiple input sources
• Power supplies utilizing redundant or standby input configurations

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

Verify the specific ordering suffix DPR5 corresponds to the D2PAK-5 package shipped in tape and reel format as documented in the official datasheet. Confirm that the component meets RoHS compliance requirements specified by the manufacturer. Ensure the procurement channel provides valid traceability documentation consistent with onsemi manufacturing standards. Cross-reference the publication order number CS5233-3/D to ensure access to the correct technical specifications and revision history.

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

Select this regulator when designing circuits requiring seamless power transfer between main and standby voltages without output glitches. The D2PAK-5 package is suitable for applications demanding higher current capabilities up to 1.5 A from the VIN rail. Consider the auxiliary drive feature if system architecture requires maintaining output power during total input loss via an external PFET. Evaluate thermal management requirements based on the junction-to-ambient resistance characteristics provided in the datasheet.

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

The CS5233-3 series belongs to onsemi's lineup of dual-input linear regulators designed for system power management. This specific variant integrates auxiliary control logic to manage power sources compliant with Advanced Configuration and Power Interface (ACPI) standards. It serves as a specialized solution for maintaining stable voltage rails in computing peripherals where uninterrupted power delivery is critical during state transitions.

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

The datasheet explicitly states the device is similar to the CS5231-3. Designers should verify pin compatibility and electrical parameter alignment before substituting this part with the CS5231-3 or other family members.

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

How does the CS5233-3 handle transitions between different power sources?

The device provides glitch-free transitions between the VIN, VSB, and 3.3 V AUX supplies using an internal comparator and auxiliary drive control to switch seamlessly without output interruption.

What is the function of the AuxDrv pin?

The AuxDrv pin controls an external p-channel FET to connect the 3.3 V auxiliary supply to the output when both VIN and VSB are absent or drop below the turn-off threshold.

What protections are included in the CS5233-3?

The IC includes current limit protection (3.0 A for VIN, 800 mA for VSB) and thermal shutdown at 180°C with 25°C hysteresis to prevent damage under fault conditions.