AP7343D-135W5-7

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

The AP7343D-135W5-7 is a fixed-output low dropout regulator manufactured by Diodes Incorporated, providing a stable 1.35V output with a guaranteed maximum load 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 supports operation across an ambient temperature range of -40°C to +85°C.

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

• Integrated N-channel auto-discharge function ensures rapid output voltage decay when disabled
• High ripple rejection capability minimizes power supply noise interference
• Low quiescent current consumption optimizes battery life in portable applications
• Built-in thermal shutdown and fold-back current limit protect against overheating and short circuits

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

• RF power supplies
• Portable media players
• Wireless communication devices
• Smartphones and tablets

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

Verify the specific suffix 'D' indicates the inclusion of the internal output discharge feature, distinguishing it from standard variants. Confirm the 'W5' designation corresponds to the SOT-25 package type required for your PCB layout. Ensure the ordering code matches the exact 1.35V output specification needed for your circuit design before finalizing procurement.

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

Select this component when a precise 1.35V rail is required with fast discharge capabilities for safety compliance. The SOT-25 package offers a small footprint suitable for dense layouts. Consider the 300mA current limit and 1.7V minimum input voltage to ensure adequate headroom for your specific application requirements.

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

This part belongs to the AP7343 family of CMOS low-dropout regulators designed for low-power handheld equipment. The series provides various fixed output voltages ranging from 0.9V to 3.6V. The 'D' variant specifically adds an auto-discharge feature, while the 'W5' suffix denotes the SOT-25 packaging option available for space-constrained designs.

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

AP7343-135W5-7 serves as the non-discharge equivalent if the auto-discharge feature is not required.