LF80CDT-TRY

Overview

The LF80CDT-TRY is a fixed-output linear voltage regulator from the LF series, manufactured by STMicroelectronics. It provides an 8 V output with a maximum current of 500 mA. The device operates within an input voltage range of -0.5 V to 40 V and features a very low dropout voltage of 0.45 V. It is qualified under AEC-Q100 standards for automotive applications, supporting a temperature range from -40 °C to +125 °C. The regulator utilizes a DPAK surface-mount package and requires only a 2.2 µF capacitor for stability.

Feature Summary

• Very low dropout voltage of 0.45 V enables efficient operation in battery-powered systems
• Automotive grade qualification (AEC-Q100) ensures reliability in harsh environments
• Logic-controlled shutdown function reduces total power consumption in standby modes
• Requires minimal external capacitance (2.2 µF) for stable regulation

Applications

• Battery-powered electronic systems requiring low noise and low power
• Automotive electronics operating within specified temperature ranges
• Low-noise power supply circuits for sensitive analog components
• Local regulators in multi-supply board architectures with shutdown control

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm the specific suffix 'TRY' matches the required reel packaging and tape-and-reel specifications. Check for recent Product Change Notifications (PCN) regarding manufacturing site changes or material updates. Ensure compliance with RoHS and REACH directives as stated in the official datasheet. Validate that the automotive grade qualification aligns with your system's reliability requirements.

Selection Notes

Select this component when a fixed 8 V output is required with high efficiency at low voltage differentials. The AEC-Q100 qualification makes it suitable for automotive designs where thermal management and long-term reliability are critical. Consider the DPAK package for its balance of thermal performance and board space. Verify that the 500 mA output current meets the load requirements without exceeding thermal limits. The logic-controlled shutdown feature offers additional power savings if system standby modes are utilized.

Part Context

The LF80CDT-TRY belongs to the LFXX family of very low dropout regulators. This family includes various output voltages and packages such as TO-220, TO-220FP, DPAK, and PPAK. The LFXX series is designed for low-noise, low-power applications, particularly in battery-operated devices. The automotive-grade variants offer enhanced reliability and are tested according to strict automotive standards.

Replacement Considerations

Check for other LFXX series parts with compatible output voltages and packages. Verify if alternative LDO regulators from ST or other manufacturers meet the same AEC-Q100 and electrical specifications. Ensure any substitute maintains the 0.45 V dropout characteristic and 500 mA current capability.