CAT6219180VP5GT4

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

The CAT6219180VP5GT4 is a fixed 1.8 V output CMOS low dropout regulator from onsemi, housed in a TDFN-6 (2x2 mm) package. It provides a guaranteed peak output current of 500 mA with a typical dropout voltage of 300 mV at full load. The device operates within an input voltage range of 2.3 V to 5.5 V and features ±1.0% initial accuracy for outputs ≥2.0 V. Key electrical characteristics include a typical no-load ground current of 55 µA, a shutdown ground current of 1 µA, and a thermal shutdown threshold of 160 °C.

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

• Quick-start feature enables fast turn-on time without delay when using an external bypass capacitor.
• Zero current shutdown mode ensures minimal power consumption during standby periods.
• Stable operation is maintained with small value ceramic output capacitors, reducing board space requirements.

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

• Battery-powered portable devices
• Cellular phones
• Consumer electronics

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

Verify the specific VP5 suffix corresponds to the TDFN-6 package configuration as documented in the official datasheet ordering information. Confirm that the AB marking code aligns with the 1.8 V fixed output variant. Ensure compliance with RoHS standards and lead-free specifications required for the target assembly process.

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

Select this component for applications requiring a compact footprint and low quiescent current. The TDFN-6 package offers thermal performance superior to TSOT-23 variants. Validate that the system input voltage remains within the 2.3 V to 5.5 V operating range and that the load current does not exceed the 500 mA peak rating.

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

This part belongs to the CAT6219 family of 500 mA LDO regulators. The family includes fixed voltage options ranging from 1.25 V to 3.3 V, as well as adjustable versions. Variants are available in TSOT-23, WDFN-6, and TDFN-6 packages to accommodate different spatial and thermal design constraints.

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

Compatible substitutes within the same family include CAT6219280VP5GT4 (2.8 V) and CAT6219330VP5GT4 (3.3 V). For adjustable output requirements in the same package, consider CAT6219ADJVP5GT4. Verify pinout compatibility before substitution.

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

How does the quick-start feature affect noise performance?

The quick-start feature allows the use of an external bypass capacitor to reduce overall output noise without affecting the turn-on time of the regulator.

What is the function of the EN pin?

The EN pin is an active-high enable input. It contains an internal 2.5 MΩ pull-down resistor that disables the circuit if left open.