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Product Detailed Parameters
- Description：IC REG LINEAR 2.8V 1A 8-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)：2.8V
- Voltage - Output (Max)：-
- Voltage Dropout (Max)：0.175V @ 1A
- Current - Output：1A
- Current - Quiescent (Iq)：155 µA
- Current - Supply (Max)：-
- PSRR：70dB ~ 55dB (1kHz ~ 100kHz)
- Control Features：Enable
- Protection Features：Over Current, Over Temperature, Short Circuit
- Operating Temperature：-40°C ~ 125°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：8-XFDFN Exposed Pad
- Supplier Device Package：8-DFN (1.6x1.2)
- Grade：-
- Qualification：-
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Overview
The LD56100DPU28R is a high-accuracy linear voltage regulator from STMicroelectronics, providing a fixed 2.8 V output with a maximum current of 1 A. It operates within an input voltage range of 1.8 V to 5.5 V and features a typical dropout voltage of 130 mV at full load. The device incorporates ultra-low noise characteristics (13 µV RMS) and high power supply rejection ratio (70 dB at 1 kHz). It includes logic-controlled shutdown, internal soft-start, and foldback short-circuit protection. Packaged in a compact DFN8 (1.2 x 1.6 mm) format, it supports operation from -40 °C to +125 °C.
Feature Summary
- Ultra-low noise performance suitable for sensitive analog circuits
- Logic-controlled electronic shutdown with minimal standby consumption
- Integrated soft-start circuit to manage inrush currents
- Foldback current limiting and thermal protection mechanisms
Applications
- Mobile phones
- Tablets
- Battery-powered systems
- Camera supply
Procurement Notes
Verify the specific ordering code LD56100DPU28R against official STMicroelectronics documentation to confirm the 2.8 V output voltage and auto-discharge feature availability. Ensure compatibility with the required DFN8 package dimensions and operating temperature range before finalizing procurement specifications.
Selection Notes
Select this component when a stable 2.8 V rail is required for low-noise applications such as camera modules or mobile devices. Consider the DFN8 footprint constraints and verify that the input voltage remains above the minimum threshold while accounting for dropout voltage under maximum load conditions.
Part Context
This part belongs to the LD56100 series of very low dropout linear regulators designed for space-saving surface-mount applications. The series offers various fixed output voltages and shares common features like ultra-low quiescent current and fast transient response, making it suitable for portable electronics requiring efficient power management.
Replacement Considerations
Direct substitutes include other LD56100 variants with different fixed output voltages, such as LD56100DPU33R for 3.3 V or LD56100DPU18R for 1.8 V, provided the system design accommodates the voltage difference. Verify pinout and package compatibility before substitution.
FAQ
Does the LD56100DPU28R include an output discharge function?
Yes, the LD56100DPU28R variant includes an optional output voltage discharge feature activated when the enable pin goes low.
What is the maximum output current capability of this regulator?
The LD56100DPU28R provides up to 1 A of output current, with the LCON pin allowing selection between 1 A and 0.5 A limits.
