CAT6217-250TDGT3

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

The CAT6217-250TDGT3 is a fixed positive LDO regulator providing a 2.5 V output with a maximum current of 150 mA. It operates within an input voltage range of 2.3 V to 5.5 V and features a typical dropout voltage of 90 mV at full load. The device includes a quick-start feature, zero shutdown current, and low ground current of 55 µA typical. It utilizes a 5-lead TSOT-23 package and maintains ±1.0% initial accuracy for outputs ≥ 2.0 V.

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

• Quick-start capability allows the use of external bypass capacitors to reduce output noise without affecting turn-on time.
• Zero shutdown current mode combined with low ground current ensures high efficiency in battery-operated applications.
• Stable operation is guaranteed with small ceramic output capacitors, reducing board space requirements.

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 that the specific suffix TDGT3 corresponds to the 2.5 V fixed output variant as indicated by the model number. Confirm RoHS compliance and lead-free status against the manufacturer's latest documentation. Ensure the ordering code matches the required package type and temperature rating before finalizing procurement.

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

Select this component when a stable 2.5 V rail is required from a 2.3 V to 5.5 V supply. It is suitable for designs prioritizing low quiescent current and fast transient response. Verify that the application load does not exceed the 150 mA maximum output current limit under all operating conditions.

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

This part belongs to the CAT6217 series of 150 mA CMOS LDO regulators manufactured by onsemi. The series offers various fixed output voltages and adjustable options, sharing common features such as thermal protection, current limiting, and UVLO circuits across the family.

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

Direct replacements include other CAT6217 variants with different fixed output voltages (e.g., CAT6217-285) if the voltage requirement changes. Cross-family replacements require matching the 150 mA current rating, TSOT-23-5 package, and 2.3 V to 5.5 V input range specifications.

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

What is the purpose of the BYP pin?

The BYP pin allows connection of an optional 10 nF capacitor to ground to reduce output noise and enhance power supply rejection ratio (PSRR) at high frequencies.

How does the EN pin function?

The EN pin is an active-high enable input with an internal 2.5 MΩ pull-down resistor, ensuring the device remains disabled if the pin is left open.