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Product Detailed Parameters
- Description：IC REG LIN 2.5V 150MA TSOT-23-5
- Series：-
- Mfr：STMicroelectronics
- Package：Tape & Reel (TR),Cut Tape (CT)
- Output Configuration：Positive
- Output Type：Fixed
- Number of Regulators：1
- Voltage - Input (Max)：6V
- Voltage - Output (Min/Fixed)：2.5V
- 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 LD3985G25R is a low-dropout linear voltage regulator manufactured by STMicroelectronics, providing a fixed 2.5 V output with a maximum load current of 150 mA. It operates within an input voltage range of 2.5 V to 6 V and utilizes a TSOT-23 surface-mount package with five pins. The device features ultra-low quiescent current, typically 85 μA at no load and 170 μA at full load, ensuring extended battery life in portable applications. It includes logic-controlled shutdown functionality and internal thermal and current limiting protections.
Feature Summary
- Ultra-low dropout voltage operation compatible with low ESR ceramic capacitors
- Logic-controlled electronic shutdown for standby power management
- Internal current limit and thermal protection mechanisms
Applications
- Battery-powered wireless systems
- Mobile phones
- Low power consumer electronics
Procurement Notes
Verify the specific suffix 'G' against official datasheets to confirm it denotes RoHS compliance or lead-free status rather than a functional variation. Ensure the ordering code matches the exact TSOT-23 package dimensions and pin configuration required for your PCB layout. Cross-reference the manufacturer's latest documentation to confirm availability and any potential obsolescence notices.
Selection Notes
Select this component when a stable 2.5 V rail is required from a single-cell lithium battery or similar supply source. Its low noise characteristics make it suitable for sensitive analog circuits. Consider the 150 mA current limit and ensure the thermal dissipation capabilities of the TSOT-23 package are sufficient for the expected load conditions and ambient temperature.
Part Context
This part belongs to the LD3985 series of BiCMOS voltage regulators designed for low-noise and low-power applications. The series is characterized by its ability to maintain high power supply rejection ratios down to low input voltages, making it ideal for battery-operated devices where efficiency and signal integrity are critical.
Replacement Considerations
Direct substitutes include other parts from the LD3985 family with different fixed output voltages, such as LD3985M33R (3.3 V) or LD3985G18R (1.8 V), provided the system voltage requirements allow for adjustment. Verify that any replacement maintains the same TSOT-23 footprint and electrical specifications.
