CAT6219-125TDGT3

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

The CAT6219-125TDGT3 is a fixed-output low-dropout (LDO) voltage regulator manufactured by onsemi. It provides a fixed output voltage of 1.25 V with a maximum continuous output current of 500 mA. The device operates within an input voltage range of 2.3 V to 5.5 V and features a typical power supply rejection ratio (PSRR) of 64 dB. It is housed in a TSOT-23-5 surface-mount package and supports operation across an extended temperature range from -40°C to +125°C.

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

• Provides a stable, fixed 1.25 V output voltage suitable for sensitive digital logic supplies.
• Delivers up to 500 mA of load current while maintaining regulation under varying line and load conditions.
• Features high ripple rejection performance to minimize noise coupling into downstream circuits.

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

• Powering field-programmable gate arrays (FPGAs) requiring precise core voltage rails.
• Supplying voltage references for analog-to-digital converters (ADCs).
• Biasing operational amplifiers in precision measurement instrumentation.

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

Verify the specific suffix 'GT3' against the manufacturer's latest datasheet to confirm pinout compatibility and RoHS status. Confirm availability through authorized distributors as lead times may vary. Ensure the PCB footprint matches the TSOT-23-5 package dimensions specified in the official mechanical drawings before finalizing procurement.

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

Select this component when a fixed 1.25 V rail is required at currents up to 500 mA. It is appropriate for designs where input voltages fluctuate between 2.3 V and 5.5 V. Consider the thermal dissipation capabilities of the TSOT-23-5 package relative to the expected ambient temperature and load profile to ensure reliable operation within the specified junction temperature limits.

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

This part belongs to the CAT6219 series of low-dropout regulators designed for portable and battery-powered applications. The series offers various fixed output voltages to accommodate different logic families. The CAT6219-125 variant specifically targets low-voltage digital cores that require tight tolerance and low noise performance from their power supply source.

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

Check for direct cross-reference part numbers from onsemi or other manufacturers offering identical 1.25 V fixed output, 500 mA capability, and TSOT-23-5 packaging. Verify electrical parameter equivalence, particularly dropout voltage and PSRR, before substituting.