LDBL20D-33R

Overview

The LDBL20D-33R is a high-accuracy linear voltage regulator from the STMicroelectronics LDBL20 series. It provides a fixed 3.3 V output with a maximum current of 200 mA, operating within an input voltage range of 1.5 V to 5.5 V. The device features a typical dropout voltage of 200 mV at full load and maintains a very low quiescent current of 20 µA under no-load conditions. It incorporates internal soft-start, constant current limiting, and thermal protection mechanisms. The component is housed in a compact 4-STSTAMP™ package measuring 0.47 x 0.47 mm².

Feature Summary

• Ultra-low dropout voltage capability for efficient power management
• Logic-controlled electronic shutdown function for extended battery life
• Integrated soft-start circuitry to limit inrush current during startup

Applications

• Low-power battery-operated portable devices
• Space-constrained handheld electronics
• Portable industrial instrumentation

Procurement Notes

Verify the specific suffix 'D' indicates the reel packaging configuration as documented by the manufacturer. Confirm that the 3.3 V output variant matches the required system voltage rails. Ensure compatibility with the specified 0.47 µF ceramic output capacitor for stability. Check for RoHS compliance status relevant to the production batch.

Selection Notes

Select this component when a fixed 3.3 V rail is required with minimal board space constraints. The ultra-small footprint makes it suitable for dense layouts where standard packages are unsuitable. Consider its low quiescent current for applications prioritizing standby power efficiency over high-current delivery capabilities.

Part Context

This part belongs to the LDBL20 family of ultra-low dropout regulators designed specifically for space-saving requirements. The series utilizes the proprietary STSTAMP™ technology to achieve a significantly reduced physical profile compared to traditional surface-mount packages while maintaining robust electrical performance characteristics.

Replacement Considerations

Direct substitutes include other variants within the LDBL20 series offering different fixed output voltages or adjustable configurations. Cross-reference with other ultra-tiny LDO regulators featuring similar 200 mA output currents and compatible pinout geometries if mechanical integration allows.