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Product Detailed Parameters
- Description：IC REG LINEAR 3.1V 150MA SOT-25
- Series：-
- Mfr：Diodes Incorporated
- Package：Tape & Reel (TR)
- Output Configuration：Positive
- Output Type：Fixed
- Number of Regulators：1
- Voltage - Input (Max)：5.25V
- Voltage - Output (Min/Fixed)：3.1V
- Voltage - Output (Max)：-
- Voltage Dropout (Max)：0.29V @ 150mA
- Current - Output：150mA
- Current - Quiescent (Iq)：60 µA
- Current - Supply (Max)：100 µA
- PSRR：75dB (1kHz)
- 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-25
- Grade：-
- Qualification：-
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Overview
The AP7315D-31W5-7 is a low dropout regulator manufactured by Diodes Incorporated, featuring an integrated auto-discharge circuit. It provides a fixed output voltage of 3.1V with a guaranteed maximum output current of 150mA. The device operates within an input voltage range of 1.7V to 5.25V and maintains high output accuracy of ±1%. Key electrical characteristics include a ripple rejection ratio of 75dB at 1kHz, low output noise of 60µVrms from 10Hz to 100kHz, and a quiescent current as low as 35µA. It is housed in a SOT25 package.
Feature Summary
- Integrated enable pin for power control and shutdown mode management
- Built-in auto-discharge function to rapidly reduce output voltage when disabled
- High ripple rejection ratio ensuring stable performance against input noise
- Low output noise suitable for sensitive RF and communication circuits
Applications
- Smart Phone/PAD
- RF Supply
- Cameras
- Portable Videos
- Wireless Communication
Procurement Notes
Verify the specific ordering suffix 'W5' corresponds to the SOT25 package configuration required for your PCB layout. Confirm that the 'D' designation indicates the inclusion of the internal discharge resistor, which affects standby behavior compared to non-discharge variants. Ensure compatibility with RoHS compliance standards if operating in regulated regions.
Selection Notes
Select this component when a fixed 3.1V rail is required with strict noise constraints. The SOT25 package offers a compact footprint for dense layouts. Consider the auto-discharge feature if rapid output voltage decay is necessary upon shutdown. Verify that the input voltage remains within the 1.7V to 5.25V range under all load conditions.
Part Context
This part belongs to the AP7315 series of CMOS low dropout regulators designed for low power handheld equipment. The series includes various fixed output voltages ranging from 1.1V to 3.3V. The 'D' suffix specifically denotes the version equipped with an output discharge resistor, differentiating it from standard versions without this feature.
Replacement Considerations
AP7315-31W5-7 (Non-discharge variant)
FAQ
What is the function of the EN pin?
The EN pin enables or disables the regulator. Driving it high turns the regulator on, while pulling it low activates shutdown mode.
How does the D suffix affect operation?
The D suffix indicates the presence of an internal auto-discharge resistor that pulls down the output voltage when the device is disabled.
