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Product Detailed Parameters
- Description：IC REG LINEAR 1.5V 250MA SOT23-5
- Series：-
- Mfr：Fremont Micro Devices Ltd
- Package：Tape & Reel (TR)
- Output Configuration：Positive
- Output Type：Fixed
- Number of Regulators：1
- Voltage - Input (Max)：6V
- Voltage - Output (Min/Fixed)：1.5V
- Voltage - Output (Max)：-
- Voltage Dropout (Max)：0.3V @ 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 FT531CA is a fixed-output linear low-dropout (LDO) voltage regulator manufactured by Fremont Micro Devices Ltd. It provides a fixed output voltage of 1.5V with a maximum continuous output current of 250mA. The device features a maximum input voltage rating of 6V and a typical dropout voltage of 0.3V at 100mA load. Quiescent current is specified at 36µA, ensuring efficient operation in battery-powered applications. Power supply rejection ratio (PSRR) ranges from 72dB to 60dB across frequencies of 1kHz to 10kHz. The component is housed in an SOT-23-5 package (SC-74A/SOT-753) and operates within a temperature range of -40°C to 85°C.
Feature Summary
- Fixed 1.5V output configuration for stable power delivery
- Low quiescent current consumption for energy efficiency
- Integrated overcurrent protection for circuit safety
- Enable control feature for power management
Applications
- Battery-powered portable electronic devices
- Embedded systems requiring stable 1.5V logic levels
- Consumer electronics with space-constrained PCB layouts
- Industrial control modules operating in wide temperature ranges
Procurement Notes
Verify the exact suffix 'CA' corresponds to the 1.5V output variant, as the FT531 series includes other voltage options. Confirm package compatibility with SC-74A or SOT-753 footprints during design review. Check for RoHS3 compliance status if required by your manufacturing standards. Ensure the supplier source is authorized to avoid counterfeit components, especially given the component's discontinued status in some regions.
Selection Notes
Select this component when a precise 1.5V rail is needed with minimal board space. The SOT-23-5 package offers a compact solution for high-density designs. Consider the 250mA current limit for load requirements; higher currents may require parallel configurations or different regulators. The low dropout characteristic makes it suitable for applications where input voltage is close to the output voltage.
Part Context
The FT531CA belongs to the FT531 family of linear regulators from Fremont Micro Devices. This family is designed for general-purpose PMIC applications requiring low noise and high PSRR. The CA suffix specifically denotes the 1.5V output version, distinguishing it from other variants like the EA (2.5V) or AA (1.2V). These components are part of the broader portfolio of low-power voltage regulation solutions.
Replacement Considerations
Publicly confirmed substitute part numbers include AP7335-25WG-7 from Diodes Incorporated and LDS3985M25R from STMicroelectronics. Verify pinout compatibility and thermal performance before substitution. Note that these alternatives may have different electrical characteristics or packaging options.
