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 3V 150MA TSOT-23-5
- 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)：3V
- Voltage - Output (Max)：-
- Voltage Dropout (Max)：0.1V @ 150mA
- 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：SOT-23-5 Thin, TSOT-23-5
- Supplier Device Package：TSOT-23-5
- Grade：-
- Qualification：-
Download product information
Overview
The LD3985G30R is a fixed-output linear voltage regulator manufactured by STMicroelectronics. It provides a fixed output voltage of 3.3 V with a maximum continuous output current of 550 mA. The device operates within an input voltage range from 2.5 V to 6 V and features a typical dropout voltage characteristic suitable for low-power applications. Key electrical parameters include a quiescent current of 170 µA at full load and a power supply rejection ratio (PSRR) of 55 dB at 1 kHz and 50 dB at 10 kHz. It incorporates shutdown logic control, overcurrent protection, and thermal overload protection.
Feature Summary
- Ultra-low dropout voltage operation compatible with low ESR ceramic capacitors
- Logic-controlled electronic shutdown function for standby power management
- Integrated overcurrent and thermal limit protection mechanisms
Applications
- Battery-powered wireless systems
- Mobile phones
- Low power consumer electronics
Procurement Notes
Verify the specific suffix 'G30R' against the official STMicroelectronics datasheet to confirm the 3.3V fixed output configuration and TSOT-23 package type. Ensure compatibility with low ESR ceramic output capacitors as required by the regulator design. Confirm RoHS compliance status and check for any specific handling instructions related to the surface-mount package during assembly.
Selection Notes
Select this component when a stable 3.3V rail is required from a 2.5V to 6V source with up to 550mA load capability. It is suitable for designs prioritizing low noise and high PSRR in battery-operated environments. Consider the shutdown pin functionality if system-level power conservation is necessary. Verify that the application's thermal dissipation requirements align with the TSOT-23 package capabilities under expected ambient conditions.
Part Context
The LD3985 series belongs to STMicroelectronics' family of ultra-low drop-out, low-noise BiCMOS voltage regulators. These devices are engineered for stability with low ESR ceramic capacitors, distinguishing them from older LDOs requiring tantalum or aluminum electrolytics. The series targets portable and battery-driven applications where efficiency and noise performance are critical constraints.
Replacement Considerations
Cross-reference with other LD3985 variants such as LD3985G18R or LD3985G25R if different fixed output voltages are needed. For higher current requirements, consider the LDS3985 series which offers increased output capacity.
