AP7343-135FS4-7B

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

The AP7343-135FS4-7B is a fixed-output low dropout regulator manufactured by Diodes Incorporated, providing a stable 1.35V output with a guaranteed 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 alongside low output noise of 60µVrms from 10Hz to 100kHz. The device incorporates an enable pin for power management, achieving a quiescent current as low as 35µA. Packaged in the compact X2-DFN1010-4 (Type B) format, it supports operation across temperatures from -40°C to +85°C.

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

• Integrated enable control allows precise power switching between active and shutdown modes.
• High ripple rejection capability ensures clean power delivery for sensitive RF applications.
• Low output noise characteristics support precision analog and digital circuitry.
• Built-in thermal shutdown and current limit protection enhance operational reliability.

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

• Smart phones and tablets
• RF supplies
• Cameras
• Portable videos
• Wireless communication

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

Verify the specific ordering suffix FS4-7B corresponds to the required X2-DFN1010-4 package and tape-and-reel quantity. Confirm that the non-discharge variant matches system requirements, as discharge versions carry a different suffix. Ensure compatibility with RoHS 3 compliance standards before finalizing procurement orders.

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

Select this component when a fixed 1.35V rail is needed with minimal footprint constraints. The X2-DFN1010-4 package offers superior thermal dissipation compared to smaller alternatives. Consider the 300mA output capability against peak load demands to ensure adequate headroom. Verify input voltage stability remains within the 1.7V to 5.25V operating window.

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 communication equipment. The series utilizes a CMOS process to achieve high accuracy and low static current. It is distinct from automotive-grade variants like the AP7343Q, which follow separate datasheets and qualification standards.

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

AP7343D-135FS4-7B provides identical electrical performance but includes an internal auto-discharge feature on the output pin upon shutdown. Verify if the discharge function is acceptable for the specific application design.