AP7343D-14W5-7

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

The AP7343D-14W5-7 is a fixed-output low dropout regulator manufactured by Diodes Incorporated, providing a nominal output voltage of 1.4V 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 line regulation of 0.02%/V and load regulation of 15mV. The device features a quiescent current of 35µA and achieves a ripple rejection ratio of 75dB at 1kHz. Packaged in a five-pin SOT-25 surface-mount format, it supports an operating ambient temperature range from -40°C to +85°C.

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

• Integrated enable pin for precise power management control
• Built-in auto-discharge circuitry for rapid output voltage decay upon shutdown
• High power supply ripple rejection capability for noise-sensitive applications
• Low output noise performance suitable for RF signal chains

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 output discharge feature, as standard variants lack this function. Confirm the 'W5' designation corresponds to the SOT-25 package type required for your PCB layout. Ensure the ordering code matches the exact 1.4V output specification to avoid functional mismatches in the target design.

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

Select this component when a stable 1.4V rail is required for low-noise analog or RF sections. The integrated discharge feature distinguishes it from non-discharge versions, aiding in battery life extension. 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 family of CMOS low-dropout regulators designed for handheld and portable electronics. The series offers various fixed output voltages ranging from 0.9V to 3.6V. The 'D' variant specifically includes an internal resistor network for auto-discharge, differentiating it from the base AP7343 model which lacks this functionality.

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

AP7343-14W5-7 (Non-discharge version)

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

What is the function of the 'D' suffix in the part number?

The 'D' suffix indicates that the regulator includes an internal auto-discharge circuit, which rapidly pulls down the output voltage when the enable pin is deactivated.

How does the enable pin operate?

Driving the EN pin high activates the regulator, while pulling it low disables the output and engages the discharge circuit if present.