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Product Detailed Parameters
- Description：IC REG LINEAR 3V 250MA SOT23-5
- Series：-
- Mfr：Fremont Micro Devices Ltd
- 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)：3V
- Voltage - Output (Max)：-
- Voltage Dropout (Max)：0.12V @ 100mA
- Current - Output：250mA
- Current - Quiescent (Iq)：36 µA
- Current - Supply (Max)：-
- PSRR：72dB ~ 60dB (1kHz ~ 10kHz )
- Control Features：Enable
- Protection Features：Over Current
- Operating Temperature：-40°C ~ 85°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 FT531IA is a fixed-output linear low-dropout regulator manufactured by Fremont Micro Devices Ltd. It provides a fixed output voltage of 1.8V with a maximum continuous output current of 250mA. The device supports an input voltage range up to 6V and features a typical dropout voltage of 0.4V at 100mA load. Key electrical characteristics include a quiescent current of 36 µA and power supply rejection ratios ranging from 72dB to 60dB across the 1kHz to 10kHz frequency band. It operates within a temperature range of -40°C to 85°C and is housed in a SOT-23-5 surface-mount package.
Feature Summary
- Fixed positive output voltage regulation
- Integrated overcurrent protection circuitry
- Enable pin control functionality
- Low quiescent current operation
Applications
- Battery-powered portable electronic devices
- General-purpose power management for embedded systems
- Noise-sensitive analog circuit powering
Procurement Notes
Verify component authenticity through authorized distribution channels due to discontinuation status. Confirm RoHS compliance and MSL level 1 handling requirements during storage and assembly. Validate that the specific suffix corresponds to the required 1.8V output variant before procurement.
Selection Notes
Select this component when a stable 1.8V rail is required with moderate current demands. Ensure input voltage remains within the 6V maximum limit. Consider the SOT-23-5 footprint constraints and thermal dissipation capabilities relative to the expected load current and ambient operating conditions.
Part Context
This part belongs to the FT531 series of PMIC linear regulators. It shares common architectural features with other variants in the family, differing primarily in fixed output voltage settings. The series targets applications requiring compact footprints and efficient power management in space-constrained designs.
Replacement Considerations
Publicly confirmed substitute part numbers are not available in the provided documentation. Cross-reference with equivalent LDOs only after verifying pin compatibility and electrical parameter alignment.
