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Product Detailed Parameters
- Description：IC REG LINEAR 1.1V 200MA 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)：0.35V @ 200mA
- Current - Output：200mA
- Current - Quiescent (Iq)：40 µA
- Current - Supply (Max)：-
- PSRR：80dB ~ 55dB (1kHz ~ 100kHz)
- Control Features：Enable
- Protection Features：Over Current, Over Temperature, Soft Start
- Operating Temperature：-40°C ~ 125°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：4-XDFN Exposed Pad
- Supplier Device Package：4-DFN (1x1)
- Grade：-
- Qualification：-
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Overview
The LD39020DTPU11R is a fixed-output linear regulator IC from STMicroelectronics, providing a nominal output voltage of 1.1 V with a maximum load current of 200 mA. It operates within an input voltage range of 1.5 V to 5.5 V and features a typical dropout voltage of 200 mV at full load. The device incorporates an internal soft-start circuit and logic-controlled electronic shutdown, reducing standby current to below 0.1 µA. It utilizes a DFN4 1x1 surface-mount package and includes integrated overcurrent and thermal protection mechanisms.
Feature Summary
- Ultra-low dropout voltage operation for efficient power management
- Logic-controlled enable pin for precise power state management
- Integrated soft-start circuitry to limit inrush current during startup
- Internal MOSFET discharge feature for rapid output capacitor depletion
Applications
- Mobile phones
- Tablets
- Digital still cameras (DSC)
- Cordless phones and similar battery-powered systems
- Portable media players
Procurement Notes
Verify the specific suffix 'DT' indicates the inclusion of the auto-discharge feature on this part number. Confirm the package type matches the required PCB footprint. Ensure the output voltage tolerance meets the system requirements, as standard versions differ from high-accuracy variants. Check environmental compliance documentation for ECOPACK grades before finalizing procurement.
Selection Notes
Select this component when space-saving is critical due to its compact DFN4 1x1 package. It is suitable for applications requiring low quiescent current to extend battery life. Designers must ensure the output capacitor meets stability requirements regarding capacitance and ESR values. Consider the internal soft-start duration if strict inrush current limits are imposed by the upstream power source.
Part Context
This device belongs to the LD39020 family of low-dropout regulators designed for portable electronics. The family offers various output voltages and packages, including SOT23-5L. The 'DTPU' designation specifically identifies the DFN4 1x1 package variant with the auto-discharge function enabled, distinguishing it from standard or high-accuracy 'A' version counterparts.
Replacement Considerations
LD39020DTPU18R
FAQ
What is the function of the EN pin?
The EN pin serves as a logic-controlled input that activates the regulator when high and places the device into shutdown mode when low.
Does this part include an output discharge feature?
Yes, the 'DT' suffix in the part number indicates that an internal MOSFET is included to quickly discharge the output capacitor when the device is disabled.
