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Product Detailed Parameters
- Description：IC REG LINEAR 2.5V 1A 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)：2.5V
- Voltage - Output (Max)：-
- Voltage Dropout (Max)：0.4V @ 1A
- Current - Output：1A
- Current - Quiescent (Iq)：50 µA
- Current - Supply (Max)：300 µA
- PSRR：65dB ~ 62dB (1kHz ~ 10kHz)
- Control Features：Enable
- Protection Features：Over Current, Over Temperature
- Operating Temperature：-40°C ~ 125°C (TJ)
- Mounting Type：Surface Mount, Wettable Flank
- Package / Case：6-VDFN Exposed Pad
- Supplier Device Package：6-DFN (3x3)
- Grade：Automotive
- Qualification：AEC-Q100
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Overview
The LD49100PU25RY is a fixed-output low-dropout linear regulator manufactured by STMicroelectronics, providing a stable 2.5 V output with a maximum current of 1 A. 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 maintains a very low quiescent current of 20 µA at no load and 200 µA at 1 A load, with shutdown consumption below 1 µA. It includes a Power Good indicator, internal soft-start, and thermal protection, ensuring stability with 1 µF ceramic capacitors.
Feature Summary
- Automotive-grade reliability with AEC-Q100 qualification for operation across -40 °C to 125 °C
- Ultra-low noise performance without requiring external bypass capacitors
- Integrated Power Good function for precise output voltage monitoring and sequencing
- Internal short-circuit current limiting and thermal shutdown protection
Applications
- Infotainment systems
- Advanced Driver Assistance Systems (ADAS)
- Telematics units
- Body electronics
Procurement Notes
Verify the specific ordering code LD49100PU25RY against official STMicroelectronics documentation to confirm the fixed 2.5 V output configuration. Ensure compatibility with DFN6 (3x3 mm) wettable flank packaging requirements. Confirm that application circuits meet the minimum 1 µF ceramic capacitor specifications for loop stability. Validate that input voltage ranges align with system power rails before integration.
Selection Notes
Select this component when a fixed 2.5 V rail is required in automotive environments demanding high efficiency and low noise. The device is suitable for applications needing logic-controlled shutdown and power sequencing via the Power Good pin. Consider the DFN6 package size for space-constrained PCB layouts. Ensure thermal management strategies account for the junction-to-ambient resistance characteristics under expected load conditions.
Part Context
The LD49100 series comprises automotive-grade LDO regulators designed for robust power management in vehicles. This specific part belongs to the fixed-output variants, offering precision voltage regulation without external adjustment resistors. It shares common family features such as low quiescent current and soft-start functionality with other members like the adjustable PU model or different fixed voltage options.
Replacement Considerations
LD49100PURY serves as the adjustable version within the same series. Other fixed voltage variants include LD49100PU10RY, LD49100PU12RY, LD49100PU15RY, LD49100PU18RY, LD49100PU30RY, and LD49100PU33RY.
