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Product Detailed Parameters
- Description：IC REG LINEAR 1V 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)：1V
- Voltage - Output (Max)：-
- Voltage Dropout (Max)：0.4V @ 1A
- Current - Output：1A
- Current - Quiescent (Iq)：50 µA
- Current - Supply (Max)：300 µA
- PSRR：-
- Control Features：Enable, Power Good
- 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
Download product information
Overview
The LD49100PU10RY is a fixed-output automotive-grade low-dropout linear regulator manufactured by STMicroelectronics. It provides a guaranteed output current of 1 A with a fixed output voltage of 1.0 V. The device 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. It includes a Power Good indicator, logic-controlled electronic shutdown, and internal thermal and short-circuit protection. The component is qualified to AEC-Q100 Grade 1 standards for operation between -40 °C and +125 °C.
Feature Summary
- AEC-Q100 Grade 1 qualified for automotive reliability
- Ultra-low quiescent current with logic-controlled shutdown
- Integrated Power Good function for system monitoring
- Internal soft-start circuitry to limit inrush current
Applications
- Infotainment systems
- Instrument clusters
- Advanced Driver Assistance Systems (ADAS)
- Telematics units
- Body electronics
Procurement Notes
Verify the specific ordering code matches the required fixed 1.0 V output configuration. Confirm package type DFN6 with wettable flanks aligns with PCB footprint requirements. Ensure environmental compliance specifications meet project standards. Check datasheet revision history for any updates to electrical characteristics or pin definitions before finalizing design integration.
Selection Notes
Select this component when a stable 1.0 V rail is required for automotive loads up to 1 A. The low dropout characteristic suits applications with narrow input-to-output voltage margins. The integrated Power Good signal simplifies sequencing logic. Verify that external ceramic capacitors meet stability criteria regarding capacitance and ESR values across the operating temperature range.
Part Context
This part belongs to the LD49100 family of ultra-low-dropout regulators designed for automotive environments. The series offers various fixed output voltages and adjustable versions. All variants share common features such as low noise performance, high power supply rejection ratio, and robust protection mechanisms within a compact surface-mount package suitable for space-constrained designs.
Replacement Considerations
LD49100PU12RY
FAQ
What is the purpose of the VSENSE pin on the fixed version?
The VSENSE pin allows for remote sensing of the output voltage. It must be connected to the load or directly shorted to the VOUT pin to ensure accurate regulation.
How does the Power Good function operate?
The Power Good pin indicates when the output voltage is within the correct range. It goes to high impedance when the output is valid and low impedance if the output falls below the threshold or if the device is disabled.
