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The AP7315-18SR-7 is a fixed-output low dropout regulator manufactured by Diodes Incorporated, providing a nominal output voltage of 1.8V with ±1% accuracy at +25°C. It operates within an input voltage range of 1.7V to 5.25V and supports a guaranteed maximum output current of 150mA. The device features a quiescent current as low as 35µA and achieves a ripple rejection ratio of 75dB at 1kHz. Output noise is specified at 60µVrms across the 10Hz to 100kHz bandwidth. It utilizes a SOT23 package (SR suffix) and functions reliably across an ambient temperature range of -40°C to +85°C.
Verify that the SR suffix corresponds to the SOT23 package variant when sourcing replacements or verifying inventory. Confirm the specific output voltage code matches the required 1.8V specification. Ensure compliance with RoHS and halogen-free requirements if mandated by the target application environment. Cross-reference the datasheet revision to confirm pinout consistency.
Select this component for applications requiring precise 1.8V regulation from lithium-ion battery sources. The low quiescent current makes it suitable for battery-operated portable electronics. Verify that the load transient response meets system stability requirements. Consider the SOT23 footprint constraints during PCB layout planning.
This part belongs to the AP7315 series of low dropout regulators designed for handheld communication equipment. The series offers various fixed output voltages ranging from 1.1V to 3.3V. The SR designation specifically identifies the SOT23 surface-mount package configuration without auto-discharge functionality.
AP7315-18SA-7 provides identical electrical performance in the SA package variant.