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Product Detailed Parameters
- Description：IC REG LINEAR 1.8V 300MA 6-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)：0.4V @ 300mA
- Current - Output：300mA
- Current - Quiescent (Iq)：60 µA
- Current - Supply (Max)：120 µA
- PSRR：55dB (120Hz ~ 10kHz)
- Control Features：Enable
- Protection Features：Over Current, Over Temperature
- Operating Temperature：-40°C ~ 125°C
- Mounting Type：Surface Mount
- Package / Case：6-XFDFN
- Supplier Device Package：6-DFN (1.2x1.3)
- Grade：-
- Qualification：-
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Overview
The LDK130PU18R is a fixed-output linear low-dropout regulator (LDO) manufactured by STMicroelectronics. It provides a fixed output voltage of 1.8V with a maximum continuous output current of 300mA. The device operates within an input voltage range of 1.9V to 5.5V and features a typical dropout voltage of 100mV at 100mA load, with a maximum dropout of 0.4V at full load. Quiescent current is specified at 60µA, rising to 120µA during operation. Power supply rejection ratio (PSRR) reaches 55dB between 120Hz and 10kHz. The component is housed in a compact 6-DFN package measuring 1.2x1.3mm and supports an operating temperature range from -40°C to +125°C.
Feature Summary
- Ultra-low dropout voltage performance ensures efficient regulation across wide input-to-output differentials.
- Low quiescent current consumption optimizes battery life for portable and always-on applications.
- Integrated enable logic control allows precise shutdown management with minimal standby power draw.
- Built-in thermal and overcurrent protection safeguards the device under fault conditions.
Applications
- Post-regulation stages in automotive electronic systems requiring stable voltage rails.
- Battery-powered consumer electronics where low noise and high efficiency are critical.
- Portable devices utilizing ceramic capacitors for output stabilization.
Procurement Notes
Verify the specific suffix PU18R confirms the 1.8V fixed output and DFN6 packaging configuration. Ensure compatibility with RoHS3 standards and confirm the required moisture sensitivity level handling procedures during assembly. Cross-reference the manufacturer part number against official distributor catalogs to validate authenticity and traceability before procurement.
Selection Notes
Select this component when a stable 1.8V rail is needed with minimal footprint constraints. The 6-DFN package suits space-sensitive designs. Consider the 60µA quiescent current for power budget calculations. Verify that the input voltage remains above 1.9V to ensure proper regulation. Check if the 55dB PSRR meets the noise requirements of downstream sensitive circuitry.
Part Context
This part belongs to the LDK130 series of ultra-low dropout regulators designed for low-power applications. The series offers various fixed output voltages and packages, including SOT23-5L and DFN6. While some variants carry AEC-Q100 automotive qualification, the standard LDK130PU18R is primarily characterized for general industrial and consumer use cases requiring compact size and low noise.
Replacement Considerations
Direct substitutes include other LDK130 series variants with identical pinouts but different output voltages or packages, such as LDK130PU30R for 3.0V output. Ensure any replacement maintains the same 6-DFN footprint and electrical characteristics like quiescent current and dropout voltage.
