AP7343D-105W5-7

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

The AP7343D-105W5-7 is a fixed-output low dropout regulator manufactured by Diodes Incorporated, providing a nominal output voltage of 1.05V with ±1% accuracy. It supports an input voltage range from 1.7V to 5.25V and delivers up to 300mA of output current. The device features a typical ripple rejection ratio of 75dB at 1kHz and low output noise of 60µVrms across the 10Hz to 100kHz bandwidth. Quiescent current is specified as low as 35µA, while standby current drops to 1.0µA maximum when disabled. It operates within an ambient temperature range of -40°C to +85°C and includes thermal shutdown and short-circuit protection.

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

• Integrated enable pin for power control and shutdown management
• Built-in auto-discharge circuit to rapidly release stored energy upon disable
• High power supply ripple rejection capability for clean signal integrity
• Low output noise performance suitable for sensitive RF applications

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

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

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

Verify that the specific part number matches the required output voltage and package type before ordering. Confirm RoHS compliance and lead-free status requirements align with project specifications. Ensure the supplier provides valid traceability documentation. Check for any automotive-grade alternatives if higher reliability standards are necessary for the intended deployment environment.

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

Select this component when a precise 1.05V rail is needed with minimal quiescent consumption. The SOT25 package offers a compact footprint for dense PCB layouts. Consider the discharge feature for systems requiring rapid power-down states. Evaluate thermal dissipation capabilities based on the expected load current and ambient operating conditions to ensure stable regulation under all scenarios.

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

This device belongs to the AP7343 series of CMOS low dropout regulators designed for handheld communication equipment. The 'D' suffix indicates the inclusion of an output discharge resistor, distinguishing it from non-discharge variants. The 'W5' code specifies the SOT25 surface-mount package configuration. This series emphasizes high PSRR and low noise to support demanding analog and RF sections in portable electronics.

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

AP7343-105W5-7 serves as the non-discharge equivalent within the same family.