AP7343D-16FS4-7B

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

The AP7343D-16FS4-7B is a fixed-output low dropout regulator manufactured by Diodes Incorporated, providing a stable 1.6V 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 incorporates an enable pin for power control and includes internal protections such as thermal shutdown and current limiting. Packaged in the compact X2-DFN1010-4 (Type B) format, it supports surface mount assembly 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 enable pin allows precise power management by switching the regulator on or off via logic level signals.
• Built-in discharge circuit ensures rapid output voltage decay when the device enters shutdown mode.
• CMOS-based architecture delivers low quiescent current and minimal output noise for sensitive applications.

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

• RF power supplies
• Portable media players
• Wireless communication modules

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

Verify the specific ordering suffix '7B' corresponds to the required tape and reel packaging quantity of 10,000 units per carrier. Confirm that the 'D' designation indicates the inclusion of the auto-discharge feature, which affects turn-off behavior compared to non-discharge variants. Ensure compatibility with the X2-DFN1010-4 footprint during PCB layout review.

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

Select this component when a fixed 1.6V rail is required with high ripple rejection capabilities. The integrated discharge function distinguishes it from standard versions, making it suitable for systems requiring fast output discharge upon disable. 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 series of low dropout regulators designed for low-power handheld equipment. The series offers various fixed output voltages ranging from 0.9V to 3.6V. The 'D' suffix specifically denotes the version with an output discharge resistor, differentiating it from the base AP7343 model which lacks this feature.

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

AP7343-16FS4-7B serves as a direct functional substitute if the discharge feature is not required in the application design.