AP7343-28FS4-7B

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

The AP7343-28FS4-7B is a fixed-output low dropout regulator manufactured by Diodes Incorporated, providing a precise 2.8V output with a guaranteed maximum load 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, thermal shutdown protection, and short-circuit current limiting. Packaged in the compact X2-DFN1010-4 (Type B) format, it supports surface-mount assembly with an operating temperature range spanning from -40°C to +85°C.

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

• Integrated enable control allows for active power switching between operational and shutdown states
• High ripple rejection capability ensures stable performance against input line noise
• Built-in thermal shutdown and fold-back short-circuit protection safeguard against overcurrent conditions

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

• RF power supply circuits
• Portable video equipment
• Wireless communication adapters
• Camera modules

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

Verify that the specific ordering suffix FS4 corresponds to the X2-DFN1010-4 package type required for your PCB footprint. Confirm the '7B' packing designation matches your automated assembly reel specifications. Ensure the non-discharge variant aligns with your circuit's hold-up time requirements during power-down sequences.

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

Select this component when a fixed 2.8V rail is needed with minimal board space constraints. The X2-DFN1010-4 package offers a smaller footprint compared to standard SOT-23 alternatives. Consider the 300mA current limit and 75dB PSRR for sensitive analog or RF sections requiring clean power delivery without external filtering components.

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 provides various fixed output voltages ranging from 0.9V to 3.6V. The AP7343-28FS4-7B specifically denotes the 2.8V version in the X2-DFN1010-4 package without integrated output discharge resistors.

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

AP7343D-28FS4-7B includes an internal auto-discharge feature for faster output voltage decay upon shutdown.