LT6660KCDC-3.3

Overview

The LT6660KCDC-3.3 is a micropower series voltage reference from Analog Devices, housed in a 3-lead 2mm × 2mm × 0.75mm DFN package. It provides a fixed output voltage of 3.3V with an initial accuracy tolerance of ±0.5%. The device guarantees a maximum temperature coefficient of 50ppm/°C and can supply up to 20mA of load current. Supply current typically ranges from 145µA to 220µA. It operates within an input voltage range of VOUT + 0.9V to 20V and requires no external output compensation capacitor.

Feature Summary

• Curvature compensation and laser-trimmed thin-film resistors ensure high precision and low drift.
• Eliminates the need for an output compensation capacitor, saving board space and enabling fast settling.
• Reverse-battery protection prevents reverse current conduction.
• Low IR reflow induced stress minimizes output voltage shifts during assembly.

Applications

• Handheld Instruments
• Precision Regulators
• A/D and D/A Converters
• Power Supplies
• Hard Disk Drives

Procurement Notes

Verify the specific suffix (e.g., #TRPBF) against the datasheet ordering information to confirm lead-free status and tape-and-reel packaging. Ensure the K-grade designation matches the required 0.5% accuracy and 50ppm/°C temperature coefficient specifications for your design. Confirm the operating temperature range requirements align with the specified 0°C to 70°C or -40°C to 85°C options available for this family.

Selection Notes

Select the LT6660KCDC-3.3 when a compact footprint is critical and moderate accuracy suffices. The K-grade offers a balance between cost and performance compared to H and J grades. Consider the dropout voltage of 0.9V at zero load when designing the input supply rail. Evaluate thermal regulation effects if significant power dissipation occurs due to high load currents or large input-output differentials.

Part Context

This component belongs to the LT6660 family of tiny micropower precision series references. It serves as a space-saving alternative to larger packages like the LT1460 while maintaining comparable output current capabilities. The family utilizes curvature compensation technology to achieve stable performance across varying temperatures without requiring external trimming components.

Replacement Considerations

LT6660JCDC-3.3#TRPBF

FAQ

Does the LT6660KCDC-3.3 require an output capacitor?

No, the LT6660 family is designed to be stable with no output capacitor, which saves PCB space and allows for faster settling times.

What is the minimum input-to-output voltage differential?

The minimum dropout voltage is 0.9V at zero load current and increases to approximately 1.4V at 10mA load current.