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Product Detailed Parameters
- Description：IC REG LINEAR 2.8V 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)：2.8V
- 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 LD2985AM28R is a fixed output voltage regulator from STMicroelectronics, providing a nominal 2.8 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 very low 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 utilizes a compact SOT-23-5L package and supports operation across a temperature range of -40 °C to +125 °C.
Feature Summary
- Ultra-low dropout voltage design suitable for battery-powered systems
- Logic-controlled electronic shutdown with TTL-compatible inhibit function
- Low noise performance reducible to 30 μVrms with external bypass capacitor
- 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 'AM28R' against official STMicroelectronics documentation to confirm the exact output voltage tolerance and packaging configuration. Ensure compatibility with required PCB footprint dimensions for the SOT-23-5L package. Cross-reference the datasheet for any updates regarding RoHS compliance status or recommended operating conditions before finalizing procurement orders.
Selection Notes
Select this component when a stable 2.8 V rail is required for low-power portable electronics. The choice is driven by the need for minimal voltage drop under high load currents and the requirement for active power management through the inhibit pin. Consider the low quiescent current characteristics for extending battery life in standby modes compared to standard regulators.
Part Context
This part belongs to the LD2985 family of ultra-low drop and low-noise voltage regulators. The series offers various fixed output voltages including 1.8 V, 2.5 V, 3.0 V, 3.3 V, and 5.0 V. All variants share the same core architecture featuring SOT-23-5L packaging and similar protection mechanisms, differing primarily in their regulated output levels and specific ordering suffixes.
Replacement Considerations
Direct substitutes within the same family include LD2985BM28R. Verify that alternative LDOs maintain the 150 mA output current capability and SOT-23-5L pinout compatibility if cross-referencing with other manufacturers.
