ChipApex | Global Electronic Components Supplier
SEARCH
Search Product
Search Post
— IC芯片 | 连接器 | 传感器 | 被动器件 —
Consult the customer manager about the wholesale price.
consultation hotline：86-132-6715-2157
email：[email protected]
Contact the product manager for consultation. One-stop consultation is available.
Do you want a lower wholesale price? Please send us your inquiry and we will reply immediately.
Product Detailed Parameters
- Description：IC REG LINEAR 2.8V 300MA 6-DFN
- Series：-
- Mfr：STMicroelectronics
- Package：Tape & Reel (TR)
- Output Configuration：Positive
- Output Type：Fixed
- Number of Regulators：1
- Voltage - Input (Max)：6V
- Voltage - Output (Min/Fixed)：2.8V
- Voltage - Output (Max)：-
- Voltage Dropout (Max)：0.25V @ 300mA
- Current - Output：300mA
- Current - Quiescent (Iq)：150 µA
- Current - Supply (Max)：300 µA
- PSRR：55dB ~ 50dB (1kHz ~ 10kHz)
- Control Features：Shutdown
- Protection Features：Over Current, Over Temperature
- Operating Temperature：-40°C ~ 125°C
- Mounting Type：Surface Mount
- Package / Case：6-VDFN Exposed Pad
- Supplier Device Package：6-DFN (3x3)
- Grade：-
- Qualification：-
Download product information
Overview
The LDS3985PU28R is a fixed-output linear voltage regulator manufactured by STMicroelectronics. It provides a nominal output voltage of 2.8V with a maximum load current capability of 300mA. The device operates within an input voltage range of 2.5V to 6V and features a typical quiescent current of 150µA, with a maximum supply current of 300µA. It utilizes a 6-DFN (3x3mm) package with an exposed pad for thermal dissipation. Key electrical characteristics include a maximum dropout voltage of 0.25V at full load and power supply rejection ratios of 55dB at 1kHz and 50dB at 10kHz.
Feature Summary
- Integrated shutdown logic control function for standby mode operation
- Internal protection against overcurrent and thermal overload conditions
- Compatible with low ESR ceramic capacitors for stability
Applications
- Battery-powered wireless systems
- Mobile phones
- Portable consumer electronics
Procurement Notes
Verify component authenticity through authorized STMicroelectronics distributors or certified partners. Confirm the specific package marking and date code against official datasheets. Ensure compliance with RoHS3 directives and check for end-of-life status, as this part may be discontinued. Validate that the 6-DFN footprint matches the design requirements before procurement.
Selection Notes
Select this component when a stable 2.8V rail is required from a 2.5V to 6V source with moderate current demands up to 300mA. Consider the 6-DFN package for compact surface-mount designs requiring efficient thermal management via the exposed pad. Evaluate the 150µA quiescent current against system power budgets for battery-operated applications.
Part Context
This device belongs to the LDS3985 family of ultra-low-dropout regulators designed for low-noise, low-power applications. The family offers various fixed output voltages and packages, including SOT-23 and DFN options. These regulators are engineered for high power supply rejection and fast transient response, making them suitable for sensitive analog circuits in portable devices.
Replacement Considerations
Check for direct pin-compatible alternatives within the LDS3985 series offering different output voltages or packages. Verify if newer revisions of the LD3985 or LDO families provide updated specifications or availability, ensuring functional equivalence in terms of current rating, dropout voltage, and shutdown logic.
