AP7343D-10W5-7

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

The AP7343D-10W5-7 is a fixed-output low dropout regulator manufactured by Diodes Incorporated, providing a stable 1.0V output with a maximum 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. The device includes an integrated discharge function for rapid output voltage decay upon shutdown. Packaged in SOT-25, it supports surface mount installation and functions reliably 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 resistor ensures rapid output voltage decay when disabled
• High ripple rejection capability minimizes noise interference from input power sources
• Low quiescent current consumption extends 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 modules
• Smartphones and tablets

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

Verify the specific suffix 'D' indicates the inclusion of the output discharge feature, distinguishing it from non-discharge variants. Confirm the 'W5' suffix corresponds to the SOT-25 package type required for your PCB layout. Ensure the ordering code matches the exact 1.0V fixed 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 1.0V rail is required with minimal footprint constraints. The SOT-25 package offers a compact solution for dense layouts. Consider the internal discharge feature if fast turn-off times are critical for system power management. Verify that the input voltage remains within the specified 1.7V to 5.25V range to ensure stable regulation under all operating 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 equipment. The series emphasizes high accuracy and low noise performance. The 'D' designation specifically adds an auto-discharge function to the standard regulator architecture, enhancing safety and power efficiency during standby modes compared to basic versions.

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

AP7343-10W5-7 serves as a direct functional substitute if the output discharge feature is not required in the application.

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 integrated N-channel auto-discharge resistor, which rapidly pulls the output voltage to ground when the enable pin is deactivated.

How does the enable pin control the device operation?

Driving the EN pin high turns the regulator on, while pulling it low activates the shutdown mode and engages the output discharge function to dissipate stored charge.