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Product Detailed Parameters
- Description：IC REG LIN POS ADJ 250MA 6-DFN
- Series：-
- Mfr：STMicroelectronics
- Package：Bulk
- Output Configuration：Positive
- Output Type：Adjustable
- Number of Regulators：1
- Voltage - Input (Max)：40V
- Voltage - Output (Min/Fixed)：1.2V
- Voltage - Output (Max)：12V
- Voltage Dropout (Max)：1V @ 250mA
- Current - Output：250mA
- Current - Quiescent (Iq)：5 µA
- Current - Supply (Max)：500 µA
- PSRR：60dB (1kHz)
- Control Features：Current Limit, Enable
- Protection Features：Over Current, Over Temperature, Short Circuit
- Operating Temperature：-40°C ~ 150°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：6-WDFN Exposed Pad
- Supplier Device Package：6-DFN (2x2)
- Grade：Automotive
- Qualification：AEC-Q100
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Overview
The LDQ40PURY is an adjustable low-dropout linear voltage regulator from STMicroelectronics, designed for automotive and industrial applications. It provides a guaranteed output current of 250 mA with a typical dropout voltage of 500 mV at full load. The device operates within an input voltage range of 3.3 V to 40 V and supports adjustable output voltages from 1.2 V to 12 V via the ADJ pin. It features a low quiescent current of 2 µA at no load and includes logic-controlled electronic shutdown with standby current below 0.3 µA. The component is housed in a DFN 2x2 6L package with wettable flanks, ensuring reliable soldering for high-reliability environments.
Feature Summary
- AEC-Q100 Grade 1 qualified for automotive reliability standards
- Logic-controlled enable pin allows deep shutdown mode with minimal power consumption
- Integrated protection mechanisms including short-circuit, thermal shutdown, and internal current limiting
- Open-drain Power Good output indicates regulation status
Applications
- Electric vehicle (EV) powertrain systems
- Always-on battery-connected applications
- Infotainment and instrument cluster modules
- Advanced Driver Assistance Systems (ADAS)
Procurement Notes
Verify that the specific part number LDQ40PURY corresponds to the adjustable version in the DFN 2x2 6L wettable flanks package. Confirm AEC-Q100 Grade 1 qualification requirements are met for the target application environment. Ensure compatibility with the required output voltage range and load current specifications before finalizing procurement orders.
Selection Notes
Select this component when high accuracy and automotive-grade reliability are required for space-constrained designs. The adjustable output configuration offers flexibility for non-standard voltage rails up to 12 V. Consider the DFN 2x2 6L wettable flanks package for enhanced inspection capabilities and robustness in automated assembly processes compared to standard packages.
Part Context
The LDQ40 series comprises high-accuracy LDO regulators available in fixed and adjustable versions. The LDQ40PURY specifically denotes the adjustable variant packaged in a DFN 2x2 6L format with wettable flanks, distinguishing it from standard DFN or SOT23-5L options. This packaging supports automotive-grade manufacturing standards while maintaining a compact footprint suitable for dense PCB layouts.
Replacement Considerations
Direct substitutes include other LDQ40 variants such as LDQ40PUR (standard DFN) or LDL40PURY if lower current ratings are acceptable. Verify pinout compatibility and electrical parameters against the original design requirements before substitution.
