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Product Detailed Parameters
- Description：IC REG LIN 1.85V 150MA SOT23-3
- 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)：1.85V
- 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：-
- Protection Features：Over Current
- Operating Temperature：-40°C ~ 85°C
- Mounting Type：Surface Mount
- Package / Case：TO-236-3, SC-59, SOT-23-3
- Supplier Device Package：SOT-23-3
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Overview
The AP7315-185SR7 is a fixed-output low dropout regulator manufactured by Diodes Incorporated, providing a regulated 1.85V output with a guaranteed maximum load current of 150mA. It operates within an input voltage range of 1.7V to 5.25V and features high power supply rejection ratio (PSRR) of 75dB at 1kHz alongside low output noise of 60µVrms from 10Hz to 100kHz. The device incorporates an enable pin for power control, utilizes a CMOS process, and achieves a quiescent current as low as 35µA. It is housed in the SOT23 package.
Feature Summary
- Integrated enable pin allows precise power management by turning the regulator on or off via logic level signals.
- CMOS-based architecture ensures low quiescent current consumption and minimal power loss during operation.
- High ripple rejection capability effectively suppresses input voltage fluctuations to maintain clean output power.
- Built-in short circuit protection safeguards the component against damage when the output is grounded.
Applications
- Smart Phone/PAD
- RF Supply
- Cameras
- Portable Videos
- Wireless Communication
Procurement Notes
Verify that the ordering suffix SR7 corresponds to the SOT23 package and tape & reel packaging configuration. Confirm the internal code matches the 1.85V fixed output specification. Ensure compliance with RoHS and halogen-free requirements if mandated by the target application environment. Cross-reference the datasheet revision DS38352 Rev. 2 - 2 for accurate electrical characteristics.
Selection Notes
Select this component when a stable 1.85V rail is required for sensitive analog or RF circuits within handheld devices. The low noise profile makes it suitable for powering communication modules where signal integrity is critical. Verify that the input voltage remains above the minimum threshold while accounting for dropout voltage under full load conditions.
Part Context
This part belongs to the AP7315 family of 150mA low dropout regulators designed for portable electronics. The series offers various fixed output voltages ranging from 1.1V to 3.3V. Different package options including X2-DFN1010-4, SOT25, and SOT23 are available to accommodate diverse PCB layout constraints and thermal requirements.
Replacement Considerations
AP7315-185SA-7 provides identical electrical performance in the SOT23 SA variant package.
FAQ
What is the function of the EN pin?
The EN pin serves as an enable input. Driving it high turns the regulator on, while pulling it low places the device into shutdown mode. It must not be left floating.
How does the AP7315 handle short circuits?
When the VOUT pin is shorted to ground, the internal short circuit protection triggers and clamps the output current to approximately 60mA to prevent overheating and damage.
