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Product Detailed Parameters
- Description：IC REG LINEAR 5V 150MA SOT23-5
- Series：-
- Mfr：STMicroelectronics
- Package：Tape & Reel (TR),Cut Tape (CT)
- Output Configuration：Positive
- Output Type：Fixed
- Number of Regulators：1
- Voltage - Input (Max)：16V
- Voltage - Output (Min/Fixed)：5V
- 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：-
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Overview
The LD2985AM50R is a fixed output voltage regulator from STMicroelectronics, providing a nominal 5 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
- Logic-controlled electronic shutdown for standby power management
- Ultra-low dropout voltage suitable for battery-powered systems
- Integrated internal current and thermal limit protection
Applications
- Cellular phones
- Palmtop laptop computers
- Personal digital assistants (PDA)
- Camcorders and cameras
Procurement Notes
Verify the specific suffix 'M50' confirms the 5 V fixed output variant. Confirm the 'A' grade designation matches required tolerance specifications. Ensure the SOT-23-5L package footprint aligns with the target PCB layout. Check RoHS compliance status against regional regulatory requirements. Validate that the manufacturer part number corresponds to active or obsolete status before finalizing procurement.
Selection Notes
Select this component when a stable 5 V rail is required for low-power portable electronics. The low quiescent current makes it efficient for battery-operated devices. The small SOT-23-5L package is ideal for space-constrained designs. Consider the 150 mA output capability for powering peripheral circuits. The inhibit function allows for system-level power management strategies.
Part Context
This part belongs to the LD2985 family of very low drop and low noise voltage regulators. The series is designed for applications requiring high efficiency and minimal power consumption. Other variants in the family offer different fixed output voltages such as 1.8 V, 2.5 V, 3.0 V, and 3.3 V. All members share similar package options and protection features.
Replacement Considerations
LP2985IM5-3.6/NOPB is listed as a substitute for other LD2985 variants, but its 3.6 V output differs from the 5 V requirement of the LD2985AM50R. Verify compatibility if using alternative LDOs with matching output voltage and current ratings.
