AP7343D-09FS4-7B

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

The AP7343D-09FS4-7B is a fixed-output low dropout regulator manufactured by Diodes Incorporated, providing a stable 0.9V output at up to 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 with low output noise of 60µVrms from 10Hz to 100kHz. The device includes an enable pin for shutdown control, built-in discharge functionality, and thermal/current protection. It is housed in an X2-DFN1010-4 (Type B) package.

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

• Integrated resistor network provides fixed output voltage accuracy of ±1%.
• Built-in auto-discharge circuit ensures rapid output voltage decay when disabled.
• CMOS process technology enables low quiescent current consumption.
• Includes comprehensive protection mechanisms such as thermal shutdown and fold-back short-circuit current limiting.

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

• RF supplies
• Cameras
• Portable media players

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 on a 7-inch carrier. Confirm that the 'D' designation indicates the inclusion of the output discharge feature, which differs from non-discharge variants. Ensure compatibility with RoHS 3 compliance requirements before finalizing procurement orders.

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

Select this component when a precise 0.9V rail is required for sensitive analog or RF circuits. The X2-DFN1010-4 package offers a minimal footprint suitable for dense PCB layouts. Consider the 300mA output capability and low dropout characteristics for battery-powered applications where input-to-output voltage differential may be small.

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

This part belongs to the AP7343 series of high PSRR, low-noise LDOs designed for handheld communication equipment. The 'D' suffix specifically denotes the version with integrated output discharge resistors, while 'FS4' identifies the X2-DFN1010-4 (Type B) surface-mount package. It serves as a compact power management solution for portable devices requiring efficient voltage regulation.

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

AP7343-09FS4-7B is the non-discharge equivalent within the same package family. For automotive applications, consider the AP7343Q series which holds separate automotive compliance certification under a distinct datasheet.