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Product Detailed Parameters
- Description：IC REG LIN 1.8V 150MA 5-FLIPCHIP
- 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)：1.8V
- Voltage - Output (Max)：-
- Voltage Dropout (Max)：-
- Current - Output：150mA
- Current - Quiescent (Iq)：150 µA
- Current - Supply (Max)：250 µA
- PSRR：60dB ~ 50dB (1kHz ~ 10kHz)
- Control Features：Enable
- Protection Features：Over Current, Over Temperature
- Operating Temperature：-40°C ~ 125°C
- Mounting Type：Surface Mount
- Package / Case：5-WFBGA, FCBGA
- Supplier Device Package：5-FlipChip (1.59x1.24)
- Grade：-
- Qualification：-
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Overview
The LD3985J18R is a BiCMOS ultra-low dropout linear voltage regulator manufactured by STMicroelectronics. It provides a fixed 1.8V output with a maximum current capability of 150mA. The device operates within an input voltage range of 2.5V to 6V and features very low quiescent current, typically 85µA at no load. It includes logic-controlled electronic shutdown functionality and internal protection against overcurrent and thermal overload.
Feature Summary
- Ultra-low dropout voltage performance suitable for battery-powered systems
- Logic-controlled electronic shutdown function for standby power management
- Compatible with low ESR ceramic capacitors for stable operation
Applications
- Mobile phones and wireless communication devices
- Battery-powered portable electronics
- Low noise analog circuit power supplies
Procurement Notes
Verify the specific suffix 'J' against official STMicroelectronics documentation to confirm package type and tape-and-reel specifications. Ensure compatibility with required output voltage tolerance and operating temperature range before procurement.
Selection Notes
Select this component for applications requiring low noise and extended battery life. Verify that the load current does not exceed 150mA and that the input voltage remains within the 2.5V to 6V operational window for proper regulation.
Part Context
This part belongs to the LD3985 family of ultra-low drop regulators designed for low power consumption. It utilizes BiCMOS technology to achieve high power supply rejection ratios and low output noise, making it distinct from standard LDOs in efficiency and noise performance.
Replacement Considerations
Consult official STMicroelectronics substitution guides for verified alternatives. Generic replacements may differ in pinout, dropout voltage characteristics, or stability requirements with ceramic capacitors.
