LD56050DPU150R

Overview

The LD56050DPU150R is a high-accuracy linear regulator providing a fixed 1.50 V output with a guaranteed 500 mA current capability. It utilizes an NMOS pass transistor biased by a dedicated pin to achieve ultra-low dropout performance, specified at 80 mV typical and 250 mV maximum at full load. The device operates within an input voltage range of 0.8 V to 5.5 V and maintains tight output voltage tolerance of ±0.5% at 25 °C and ±1.5% across the -40 °C to 85 °C temperature range. Packaged in a compact DFN4 1.2 x 1.2 mm footprint, it features logic-controlled shutdown consuming less than 0.1 µA.

Feature Summary

• Ultra-low dropout performance enabled by a dedicated bias supply pin for the NMOS pass transistor gate
• Logic-controlled electronic shutdown function that activates an internal MOSFET to actively discharge the output
• Integrated protection mechanisms including thermal shutdown and short-circuit current foldback

Applications

• Mobile phones
• Tablets
• Battery-powered systems
• Camera supply

Procurement Notes

Verify the specific ordering code LD56050DPU150R against the manufacturer's official datasheet DS12441 Rev 2 to confirm the 1.50 V output voltage and active output discharge functionality. Ensure compatibility with the required DFN4 1.2 x 1.2 mm package dimensions and verify that the application circuit meets the minimum capacitor requirements for stability.

Selection Notes

Select this component when space-constrained designs require a 1.50 V rail with up to 500 mA load current. The dedicated bias pin allows operation at very low input voltages, making it suitable for single-cell battery applications where minimizing voltage headroom is critical. Verify that the system can provide the necessary bias voltage or tie the bias pin to the input if conditions permit.

Part Context

This part belongs to the LD56050 family of ultra-low dropout linear regulators manufactured by STMicroelectronics. The family shares common architectural features such as the NMOS pass element and bias pin configuration but varies in fixed output voltage settings. The DPU suffix indicates the specific DFN4 1.2 x 1.2 mm package variant equipped with the output discharge feature.

Replacement Considerations

Direct substitutes include other LD56050 variants with different fixed output voltages (e.g., LD56050DPU100R for 1.00 V) provided the voltage requirement changes. Cross-family replacements must match the 500 mA current rating, DFN4 1.2 x 1.2 mm package, and bias pin architecture.