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Product Detailed Parameters
- Description：IC REG LINEAR 1.1V 500MA 4-DFN
- Series：-
- Mfr：STMicroelectronics
- Package：Tape & Reel (TR),Cut Tape (CT)
- Output Configuration：Positive
- Output Type：Fixed
- Number of Regulators：1
- Voltage - Input (Max)：5.5V
- Voltage - Output (Min/Fixed)：1.1V
- Voltage - Output (Max)：-
- Voltage Dropout (Max)：0.25V @ 500mA
- Current - Output：500mA
- Current - Quiescent (Iq)：40 µA
- Current - Supply (Max)：-
- PSRR：75dB (1kHz)
- Control Features：Enable
- Protection Features：Over Temperature, Short Circuit
- Operating Temperature：-40°C ~ 85°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：4-XDFN Exposed Pad
- Supplier Device Package：4-DFN (1.2x1.2)
- Grade：-
- Qualification：-
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Overview
The LD56050DPU110R is a fixed-output linear regulator from STMicroelectronics providing a stable 1.1V output at up to 500mA. It features an ultra-low dropout voltage of 120mV at full load and operates within an input range of 0.8V to 5.5V. The device utilizes a dedicated bias supply pin for its NMOS pass transistor, enabling high efficiency even at low input voltages. It includes logic-controlled shutdown with consumption below 0.1µA, thermal protection, and short-circuit current foldback.
Feature Summary
- Ultra-low dropout performance enabled by a dedicated bias supply pin for the NMOS pass transistor
- Logic-controlled electronic shutdown function allowing deep sleep mode with minimal current draw
- Integrated thermal protection and internal current limiting with foldback characteristics
Applications
- Low power battery-operated personal electronics
- Portable devices requiring space-saving surface mount packaging
- Always-on applications needing efficient regulation at low input voltages
Procurement Notes
Verify the specific suffix DPU110R against the official datasheet to confirm the 1.1V fixed output voltage and tolerance specifications. Ensure compatibility with the required 4-DFN 1.2x1.2mm package dimensions for your PCB layout. Confirm that the operating temperature range meets your system's environmental requirements before finalizing procurement.
Selection Notes
Select this component when designing circuits that demand minimal voltage drop across the regulator under heavy loads. It is suitable for systems where input voltage may sag close to the output level. The small footprint makes it ideal for dense layouts. Verify that the external ceramic capacitor values meet stability requirements specified in the electrical characteristics section.
Part Context
This part belongs to the LD56050 family of ultra-low dropout linear regulators designed for high accuracy and low quiescent current. The series is engineered for battery-powered applications where efficiency and size are critical constraints. The DPU110R variant specifically denotes the fixed 1.1V output configuration within this product line.
Replacement Considerations
Check for other variants within the LD56050 family offering different fixed output voltages if system requirements change. Consider the LD56020 for applications requiring lower current capacity but similar ultra-low dropout characteristics.
