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Product Detailed Parameters
- Description：IC REG LINEAR 1.2V 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)：1.2V
- 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 LD49100PU12RY is a fixed-output low-dropout linear regulator manufactured by STMicroelectronics, providing a stable 1.2 V output with a maximum current capacity 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 is qualified under the AEC-Q100 Grade 1 standard for automotive reliability and functions across a temperature range of -40 °C to +125 °C. It utilizes a compact DFN6 (3x3 mm) package with wettable flanks.
Feature Summary
- AEC-Q100 Grade 1 qualified for automotive applications
- Ultra-low quiescent current with logic-controlled electronic shutdown
- Integrated Power Good indicator for system monitoring
- Internal soft-start circuit reduces inrush current
Applications
- Infotainment systems
- Cluster instrumentation
- Advanced Driver Assistance Systems (ADAS)
- Telematics units
- Body electronics
Procurement Notes
Verify the specific ordering code LD49100PU12RY against official STMicroelectronics documentation to confirm the fixed 1.2 V output configuration. Ensure compatibility with the required DFN6 footprint and check for any updated environmental compliance grades or revision history notes prior to finalizing procurement specifications.
Selection Notes
Select this component when designing automotive power architectures requiring high efficiency under light loads and precise voltage regulation. The low noise characteristics and fast transient response make it suitable for sensitive digital loads. Consider the thermal resistance and PCB copper area requirements to manage power dissipation effectively within the specified operating temperature range.
Part Context
This part belongs to the LD49100 family of ultra low-dropout regulators designed specifically for automotive environments. The series offers various fixed output voltages and adjustable versions, all sharing common features like low static current and robust protection mechanisms. The PU suffix indicates the DFN6 package type, while RY denotes the reel packaging format.
Replacement Considerations
Direct substitutes within the same family include other LD49100 variants with different fixed output voltages, such as LD49100PU10RY or LD49100PU15RY, provided the voltage requirement differs. Verify pinout compatibility and electrical parameters before substituting.
