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Product Detailed Parameters
- Description：IC REG LINEAR 1.8V 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)：1.8V
- Voltage - Output (Max)：-
- Voltage Dropout (Max)：0.285V @ 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 LD56100DPU18R is a high-accuracy linear voltage regulator from STMicroelectronics, providing a fixed 1.8 V output with a maximum load current of 1 A. It operates within an input voltage range of 1.8 V to 5.5 V and features an ultra-low dropout voltage of 120 mV typical at full load. The device incorporates very low quiescent current (100 µA typical) and ultra-low noise characteristics (13 µV RMS). It includes logic-controlled shutdown, internal soft-start, and comprehensive protection mechanisms such as current limit foldback and thermal shutdown.
Feature Summary
- Ultra-low dropout performance ensures efficient power delivery even when the input voltage approaches the output level.
- Logic-controlled electronic shutdown enables deep sleep modes with minimal standby current consumption.
- Integrated soft-start circuit manages inrush currents during startup without requiring external components.
- Built-in short-circuit protection utilizes current limit foldback to safeguard the device under fault conditions.
Applications
- Mobile phones
- Tablets
- Battery-powered systems
- Camera supply
Procurement Notes
Verify the specific ordering code against official STMicroelectronics documentation to confirm the fixed 1.8 V output voltage and the inclusion of the auto-discharge feature. Ensure compatibility with the DFN8 package dimensions for PCB layout. Confirm that the selected component meets the required operating temperature range and electrical specifications for your application environment.
Selection Notes
Select this regulator for applications requiring precise voltage regulation with minimal space utilization. The DFN8 package offers significant footprint savings compared to larger alternatives. Consider the ultra-low noise specification if powering sensitive analog or RF circuits. Evaluate the input voltage range to ensure it aligns with the battery or power source characteristics of the target system.
Part Context
This component belongs to the LD56100 series of very low dropout linear regulators designed for portable electronics. The series provides high accuracy and fast transient response, making it suitable for battery-operated devices where power efficiency and stability are critical. The LD56100DPU18R specifically delivers a fixed 1.8 V output, distinguishing it from other variants in the family that offer different voltage levels.
Replacement Considerations
LD56100DPU33R
FAQ
What is the function of the LCON pin?
The LCON pin allows selection between two output current limit levels: connecting it to VIN sets the limit to 1 A, while connecting it to GND reduces the limit to 0.5 A.
How does the device handle output discharge?
The LD56100DPU18R integrates an optional output discharge MOSFET that activates when the EN pin is driven low, quickly discharging the output capacitor to ground.
