ST1CC40PUR

Overview

The ST1CC40PUR is an active monolithic step-down DC-DC converter designed as a precise constant current source for LED applications. It operates with a fixed switching frequency of 850 kHz and supports an input voltage range from 3.0 V to 18 V. The device delivers an adjustable output current capability up to 3 A DC, regulated via a feedback pin with a typical sense voltage drop of 100 mV. It features embedded synchronous rectification with typical RDS(on) values of 95 mΩ for the high-side switch and 69 mΩ for the low-side switch. The component is housed in an 8-pin VFQFPN package (4 mm x 4 mm) and complies with ceramic output capacitor requirements.

Feature Summary

• Integrated synchronous rectification architecture enhances efficiency performance by minimizing conduction losses.
• High switching frequency of 850 kHz allows for minimized application size through compatibility with ceramic output capacitors.
• Inhibit mode functionality significantly reduces standby current consumption to support battery-operated portable devices.
• Comprehensive protection mechanisms include thermal shutdown, internal current limiting, and output short-circuit defense.

Applications

• High brightness LED lighting systems requiring precise constant current regulation
• Portable electronic devices where standby power consumption minimization is critical
• General DC-DC conversion applications utilizing step-down topology

Procurement Notes

Verify that the specific part number suffix corresponds to the required packaging configuration, as the ST1CC40 series includes both standard SO8 and VFQFPN8 variants. Confirm that the procurement documentation explicitly references the 8-pin VFQFPN EP tape and reel format associated with the PUR suffix. Ensure that the supplier provides valid traceability data consistent with the manufacturer's active status for this component.

Selection Notes

Select this component when a compact, high-efficiency step-down solution is needed for driving LEDs with currents up to 3 A. The choice is appropriate for designs requiring a wide input voltage range up to 18 V and strict control over standby power states. Consider the thermal management capabilities inherent in the 4x4 mm package and the benefits of peak current mode control for dynamic load responses.

Part Context

The ST1CC40 belongs to a family of monolithic LED driver ICs featuring integrated power switches and control logic. It is distinct from boost-type drivers like the STLD40 series, offering a buck topology suitable for lower voltage applications. The device utilizes an embedded compensation network and peak current mode architecture to ensure stable operation without external complex circuitry.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Verify compatibility with existing evaluation boards such as STEVAL-ILL046V1 if transitioning from other ST1CC40 package variants.