CS8122YTHA5

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

The CS8122YTHA5 is a precision 5.0 V linear regulator capable of sourcing in excess of 750 mA output current. It features a low dropout voltage of 0.6 V at 0.5 A and includes an externally programmed RESET delay function using a discrete RC network. The device provides comprehensive fault protection against reverse battery, overvoltage, short circuit, and thermal runaway conditions. It withstands voltage transients ranging from −50 V to +40 V and limits short circuit current to 1.2 A typical. Packaged in a five-lead TO-220 horizontal configuration with a copper tab for heat sinking.

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

• Externally programmable RESET delay timing via discrete RC network
• Integrated latching discharge circuit for brief fault condition handling
• Hysteresis included in Delay and RESET comparators for improved noise immunity
• Robust fault protection covering reverse polarity, load dump, and thermal shutdown

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

• Automotive electronics requiring robust transient protection
• Industrial control systems needing precise voltage regulation
• Embedded applications utilizing delayed system reset sequencing
• Power supply designs requiring high current capability with low dropout

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

Verify the specific suffix 'HA' corresponds to the TO-220 Horizontal package orientation as defined in the datasheet ordering information. Confirm that the required RESET delay characteristics align with the external capacitor values specified in the electrical characteristics table. Ensure thermal management calculations account for the junction-to-case thermal resistance provided in the package data section to maintain safe operating temperatures under maximum load conditions.

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

Select this component when a fixed 5.0 V output with tight tolerance is required alongside a configurable power-good signal. The CS8122 serves as an improved replacement for the CS8126, offering tighter output voltage tolerance. Consider the horizontal lead arrangement if board layout constraints favor this specific TO-220 orientation over vertical or straight configurations. Evaluate the need for external heatsinking based on calculated power dissipation relative to the ambient temperature.

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

This part belongs to the CS8122 family of Smart Regulators manufactured by onsemi. It is designed as an enhanced version of previous models like the CS8126, featuring improved output voltage accuracy. The device integrates analog protection circuits within a single monolithic IC, combining linear regulation with digital-like fault monitoring capabilities. It is intended for applications demanding reliability under harsh electrical environments.

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

The CS8122 is explicitly documented as an improved replacement for the CS8126. When substituting, verify that the tighter output voltage tolerance of the CS8122 does not conflict with existing design margins. Ensure the RESET delay circuitry remains compatible with the new device's threshold levels and discharge characteristics.