LD1086V

Overview

The LD1086V is a low-drop positive voltage regulator from STMicroelectronics capable of delivering up to 1.5 A output current. It features fixed output voltages including 1.8 V, 2.5 V, 3.3 V, 5 V, and 12 V. Dropout voltage is guaranteed at a maximum of 1.2 V at full load. The device offers an output tolerance of ±1% at 25 °C and ±2% across the full temperature range. It operates within an input voltage range up to 30 V and supports a wide operating temperature range from -40 °C to +125 °C.

Feature Summary

• Provides high efficiency by directing quiescent current into the load rather than wasting it as heat.
• Features internal thermal limit and overcurrent protection for robust operation under fault conditions.
• Requires only a minimum 10 µF capacitor for stability, simplifying external circuit design.

Applications

• General-purpose linear power supplies requiring stable positive voltage regulation.
• Battery-powered systems where dropout voltage minimization extends battery life.
• Pre-regulator stages for switching regulators to reduce ripple and noise.

Procurement Notes

Verify the specific package variant (TO-220, D²PAK, or DFN8) required for your application, as the LD1086V designation covers multiple physical form factors. Confirm that the fixed output voltage matches your system requirements, as adjustable versions use different suffixes. Ensure compliance with automotive qualification standards if deploying in vehicle environments, noting that AEC-Q100 qualification applies specifically to adjustable versions in certain packages.

Selection Notes

Select this component when a simple, cost-effective solution is needed for currents up to 1.5 A. It is suitable for applications where the input voltage exceeds the output voltage by at least 1.2 V. Consider the TO-220 package for higher thermal dissipation needs or surface-mount packages like D²PAK for compact designs. Verify that the required output voltage is available in the fixed configuration list.

Part Context

The LD1086V belongs to the LD1086 family of low-dropout regulators designed to replace older three-terminal adjustable regulators while offering superior performance. It is part of STMicroelectronics' PMIC portfolio, focusing on efficient power management. The series is widely used in consumer electronics and industrial equipment due to its reliability and ease of integration.

Replacement Considerations

The LD1086V is pin-compatible with standard three-terminal adjustable regulators, facilitating direct upgrades. However, verify that the replacement device supports the required fixed output voltage and current rating. Check thermal characteristics to ensure adequate heat sinking if replacing a lower-power device.