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 3.1V 150MA SOT23-5
- Series：-
- Mfr：STMicroelectronics
- Package：Tape & Reel (TR)
- Output Configuration：Positive
- Output Type：Fixed
- Number of Regulators：1
- Voltage - Input (Max)：16V
- Voltage - Output (Min/Fixed)：3.1V
- Voltage - Output (Max)：-
- Voltage Dropout (Max)：0.575V @ 150mA
- Current - Output：150mA
- Current - Quiescent (Iq)：150 µA
- Current - Supply (Max)：4 mA
- PSRR：45dB (1kHz)
- Control Features：Enable
- Protection Features：Over Current, Over Temperature
- Operating Temperature：-40°C ~ 125°C
- Mounting Type：Surface Mount
- Package / Case：SC-74A, SOT-753
- Supplier Device Package：SOT-23-5
- Grade：-
- Qualification：-
Download product information
Overview
The LD2985AM31R is a fixed-output low-dropout linear regulator from STMicroelectronics, providing a stable 3.1 V output with a maximum load current of 150 mA. It operates within an input voltage range of 2.5 V to 16 V and features a typical dropout voltage of 280 mV at full load. The device incorporates logic-controlled electronic shutdown via a TTL-compatible inhibit pin, reducing quiescent current to less than 1 μA in sleep mode. Internal protections include current limiting and thermal shutdown. It is housed in a compact SOT-23-5L package and supports an operating temperature range from -40 °C to +125 °C.
Feature Summary
- Ultra-low dropout voltage ensures efficient power regulation under varying load conditions.
- Logic-controlled electronic shutdown allows for precise board-level standby management.
- Low output noise performance suitable for sensitive analog circuits.
Applications
- Cellular phones
- Palmtop laptop computers
- Personal digital assistants (PDA)
- Camcorders and cameras
Procurement Notes
Verify the specific suffix 'AM31R' against official STMicroelectronics documentation to confirm the 3.1 V output variant and packaging details. Ensure compatibility with existing PCB footprints for the SOT-23-5L package. Confirm that the logic level on the inhibit pin aligns with the system's control signals for proper shutdown functionality.
Selection Notes
Select this component when a fixed 3.1 V rail is required for battery-powered portable electronics. It is appropriate for designs prioritizing low quiescent current and minimal noise. Consider the SOT-23-5L package size constraints and the need for external bypass capacitors to achieve specified noise reduction levels.
Part Context
This part belongs to the LD2985 family of very low drop and low noise voltage regulators. The series offers multiple fixed output voltages including 1.8 V, 2.5 V, 3.3 V, and 5 V. The LD2985AM31R specifically provides the 3.1 V option within this lineup, sharing common features such as internal current/thermal limits and the inhibit function across all variants.
Replacement Considerations
LP2985IM5-3.6/NOPB by Texas Instruments is a documented similar alternative for the LD2985 series, though it provides a 3.6 V output rather than 3.1 V. Verify electrical parameter compatibility before substitution.
