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Product Detailed Parameters
- Description：IC REG LINEAR 1.8V 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)：1.8V
- Voltage - Output (Max)：-
- Voltage Dropout (Max)：0.44V @ 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
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Overview
The AP7315D-18W5-7 is a fixed-output low dropout regulator manufactured by Diodes Incorporated. It provides a nominal output voltage of 1.8V with an accuracy of ±1%. The device supports a maximum output current of 150mA and operates within an input voltage range of 1.7V to 5.25V. Key electrical characteristics include a quiescent current as low as 35µA, ripple rejection of 75dB at 1kHz, and output noise of 60µVrms from 10Hz to 100kHz. It features an integrated enable pin and auto-discharge circuitry.
Feature Summary
- Integrated auto-discharge function that actively pulls the output voltage to ground when the device is disabled.
- High power supply ripple rejection capability to minimize noise in sensitive analog circuits.
- Low output noise performance suitable for powering RF and communication modules.
- Built-in thermal protection and fold-back short-circuit current limiting.
Applications
- RF supply circuits
- Portable media players
- Wireless adapters
- Cameras
Procurement Notes
Verify the specific suffix W5 corresponds to the SOT25 package and D indicates the discharge variant. Confirm RoHS compliance and lead-free status requirements match project specifications. Ensure EN pin drive signals meet the specified high and low voltage thresholds for reliable operation.
Selection Notes
Select this component when a fixed 1.8V rail is required with minimal footprint. The SOT25 package offers a balance between thermal dissipation and board space. Consider the auto-discharge feature if rapid output voltage decay is necessary upon shutdown. Verify input voltage stability remains within the 1.7V to 5.25V operational window.
Part Context
This part belongs to the AP7315 series of CMOS low dropout regulators. The 'D' suffix specifically denotes the inclusion of an internal output discharge resistor, distinguishing it from non-discharge variants. The 'W5' suffix identifies the SOT25 surface-mount package configuration.
Replacement Considerations
AP7315-18W5-7 (Non-discharge version)
FAQ
What is the function of the 'D' suffix in the part number?
The 'D' suffix indicates that the regulator includes an internal auto-discharge circuit to pull the output voltage to ground when disabled.
How does the enable pin operate?
Driving the EN pin high enables the regulator, while pulling it low disables the device and activates the output discharge function.
