AP7343-185W5-7

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

The AP7343-185W5-7 is a fixed-output low dropout regulator manufactured by Diodes Incorporated, providing a nominal output voltage of 1.85V with a guaranteed maximum load current of 300mA. It operates within an input voltage range of 1.7V to 5.25V and maintains high accuracy with a typical ripple rejection ratio of 75dB at 1kHz. The device features a quiescent current of 35µA and utilizes a SOT25 surface-mount package.

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

• CMOS-based architecture delivering high power supply rejection ratio and low output noise for sensitive circuitry
• Integrated enable pin allows precise control over regulator activation and shutdown states
• Built-in thermal shutdown and fold-back short-circuit protection mechanisms ensure operational safety

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

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

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

Verify the specific suffix W5 corresponds to the SOT25 package configuration required for your PCB layout. Confirm that the non-discharge variant meets system requirements, as discharge versions utilize different ordering codes. Ensure compatibility with RoHS compliance standards before finalizing procurement orders.

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

Select this component when a stable 1.85V rail is needed from varying input sources between 1.7V and 5.25V. Consider the SOT25 footprint constraints and verify that the 300mA current capability aligns with peak load demands. Evaluate thermal dissipation needs based on the expected junction-to-ambient resistance in the target enclosure.

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

This part belongs to the AP7343 series of low-dropout regulators designed for handheld communication equipment. The series offers various fixed output voltages ranging from 0.9V to 3.6V. The '185' designation specifically indicates the 1.85V fixed output version within this family.

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

AP7343D-185W5-7 provides identical electrical performance but includes an internal auto-discharge feature for faster output voltage decay upon shutdown.