AP7343-12FS4-7B

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

The AP7343-12FS4-7B is a fixed-output low dropout regulator manufactured by Diodes Incorporated, providing a stable 1.2V 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, thermal shutdown protection, and short-circuit current limiting. It is housed in an X2-DFN1010-4 (Type B) package.

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

• Integrated enable control allows precise power switching between active operation and low-power shutdown modes.
• High ripple rejection capability ensures clean power delivery for sensitive RF and communication circuits.
• Built-in thermal shutdown and fold-back short-circuit protection safeguard the device under fault conditions.

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

• Smart phones and tablets
• RF power supplies
• Portable media players

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

Verify the specific suffix FS4-7B corresponds to the required X2-DFN1010-4 Type B package and tape-and-reel quantity. Confirm RoHS compliance and halogen-free status requirements against project specifications. Ensure the EN pin logic levels match the system interface before finalizing procurement.

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

Select this component when a fixed 1.2V rail is required with minimal footprint constraints. The X2-DFN1010-4 package offers dense PCB layout capabilities compared to larger alternatives. Consider the quiescent current and PSRR performance if powering noise-sensitive analog sections or wireless modules.

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 communication equipment. The series provides various fixed output voltages ranging from 0.9V to 3.6V. The AP7343-12FS4-7B specifically denotes the 1.2V version without integrated output discharge, packaged in the compact X2-DFN1010-4 format.

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

AP7343D-12FS4-7B includes integrated output discharge functionality. AP7343-12W5-7 utilizes the SOT25 package instead of X2-DFN1010-4. Verify functional equivalence regarding discharge behavior and physical footprint compatibility before substitution.