LT6660HCDC-2.5

Overview

The LT6660HCDC-2.5 is a micropower series voltage reference from Analog Devices, housed in a 3-lead 2mm × 2mm DFN package. It provides a fixed 2.5V output with an initial accuracy of ±0.2% and a maximum temperature coefficient of 20ppm/°C. The device operates within a supply voltage range of VOUT + 0.9V to 20V, drawing a typical supply current of 145µA at 25°C. It guarantees a sourcing output current of up to 20mA and includes reverse-battery protection.

Feature Summary

• Curvature compensation and laser-trimmed thin-film resistors ensure high precision and low drift.
• No external output compensation capacitor is required for stability.
• Reverse-battery protection prevents reverse current conduction.
• Low IR reflow induced stress minimizes output voltage shift during assembly.

Applications

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

Procurement Notes

Verify the specific suffix 'HC' confirms the 0.2% accuracy grade and 20ppm/°C temperature coefficient specifications. Confirm the 'DC' designation matches the 3-lead 2mm x 2mm DFN package requirements. Ensure the operating environment stays within the specified 0°C to 70°C range for guaranteed electrical parameters. Check for lead-free compliance if required by project standards.

Selection Notes

Select this part when space-constrained designs require a precision reference without output capacitors. The 20mA output capability supports moderate load currents directly. Compare against shunt references for improved power efficiency in battery-operated systems. Consider the 0.9V dropout voltage for low-voltage headroom applications.

Part Context

The LT6660 family offers space-saving alternatives to larger packages like the LT1460. It combines micropower consumption with high accuracy in a tiny footprint. The exposed pad must be soldered to the PCB ground plane for thermal and electrical performance.

Replacement Considerations

LT6660JCDC-2.5 (0.4% accuracy), LT6660KCDC-2.5 (0.5% accuracy).

FAQ

Does the LT6660HCDC-2.5 require an output capacitor?

No, the LT6660 family is designed to be stable with no output capacitor, making it suitable for fast settling or space-critical applications.

What is the minimum input-output voltage differential?

The minimum dropout voltage is 0.9V when sourcing zero load current, increasing to 1.3V at 10mA load.