AP7343D-15W5-7

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Overview

The AP7343D-15W5-7 is a fixed-output low dropout regulator manufactured by Diodes Incorporated, providing a nominal output voltage of 1.5V with a guaranteed maximum output current of 300mA. 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 integrated discharge resistor for rapid output voltage decay upon shutdown, ensuring safe system states. Packaged in the compact SOT-25-5 surface-mount format, it maintains strict voltage accuracy of ±1% across the specified operating temperature range of -40°C to +85°C.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Feature Summary

• Integrated auto-discharge function ensures rapid output voltage decay when disabled
• High ripple rejection capability minimizes power supply noise influence on sensitive loads
• Low quiescent current consumption extends battery life in portable applications
• Built-in thermal shutdown and fold-back current limit protect against overload conditions

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Applications

• RF power supply circuits
• Portable video equipment
• Wireless communication modules
• Camera systems

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Procurement Notes

Verify the specific suffix 'D' indicates the inclusion of the internal output discharge feature, which distinguishes this variant from non-discharge versions. Confirm the 'W5' designation corresponds to the SOT-25 package type required for your PCB layout. Ensure the ordering code matches the exact 1.5V output requirement, as other voltage options exist within the same series family.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Selection Notes

Select this component when a fixed 1.5V rail is required with minimal footprint constraints. The SOT-25 package offers a balance between thermal performance and board space efficiency compared to larger packages. Consider the internal discharge feature if fast turn-off times are critical for power management sequences. Verify that the input voltage remains above the minimum threshold while accounting for dropout voltage under full load conditions.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Part Context

This part belongs to the AP7343 series of CMOS low-dropout regulators designed for low-power handheld devices. The series provides various fixed output voltages ranging from 0.9V to 3.6V. The 'D' suffix specifically denotes the version with an integrated output discharge resistor, differentiating it from standard variants that lack this feature. The W5 suffix identifies the SOT-25-5 package configuration.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Replacement Considerations

AP7343-15W5-7 serves as a direct functional substitute if the output discharge feature is not required in the design.