CAT6219-330TDGT3

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

The CAT6219-330TDGT3 is a fixed-output low dropout regulator providing a nominal 3.3 V output with a guaranteed peak current of 500 mA. It operates within an input voltage range of 2.3 V to 5.5 V and features a typical dropout voltage of 300 mV at full load. The device incorporates a quick-start function, under-voltage lockout, and zero-current shutdown mode. It utilizes a 5-lead TSOT-23 package and maintains ±1.0% initial accuracy for output voltages greater than or equal to 2.0 V.

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

• Provides fast transient response during load and line variations
• Enables low noise operation via external bypass capacitor without affecting turn-on time
• Includes internal thermal protection and fold-back current limit
• Features zero shutdown current for battery-operated applications

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

• Cellular phones
• Battery-powered devices
• Consumer electronics

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

Verify the specific ordering suffix 'RV' corresponds to the 3.3 V fixed output variant in official documentation. Confirm that the TSOT-23-5 package designation matches the required board layout. Ensure compliance with RoHS standards as indicated by the manufacturer's lead-free specifications.

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

Select this component when a stable 3.3 V rail is required from a 2.3 V to 5.5 V supply source. Consider the 500 mA peak capability for high transient loads. Evaluate the need for the quick-start feature if rapid turn-on times are critical. Verify that the 300 mV dropout voltage meets the minimum headroom requirements of the system design.

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

This part belongs to the CAT6219 series of CMOS low dropout regulators manufactured by onsemi. The series offers both fixed and adjustable output options across various packages including TSOT-23, WDFN, and TDFN. The CAT6219-330TDGT3 specifically denotes the 3.3 V fixed version in the TSOT-23-5 package.

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

CAT6219-330MV2T3 (WDFN-6 package)

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

How does the BYP pin affect performance?

Connecting an optional 10 nF capacitor to the BYP pin reduces output noise and enhances power supply rejection ratio (PSRR) at high frequencies.

What is the function of the EN pin?

The EN pin is an active-high enable input that controls the regulator output. It includes an internal 2.5 MΩ pull-down resistor to ensure the device remains disabled if left open.