AP7343D-36FS4-7B

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

The AP7343D-36FS4-7B is a fixed-output low dropout regulator manufactured by Diodes Incorporated, providing a stable 3.6V 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, thermal shutdown protection, and short-circuit current limiting. It utilizes the X2-DFN1010-4 (Type B) surface-mount package.

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

• Integrated enable pin allows precise on/off control and reduces standby current consumption
• High ripple rejection capability ensures clean power delivery in noisy environments
• Built-in thermal shutdown and fold-back short-circuit protection safeguard against overload conditions

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

• RF power supplies
• Portable media players
• Wireless communication devices
• Smartphones and tablets

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

Verify the specific suffix '7B' corresponds to the required tape and reel packaging quantity of 10,000 units per carrier. Confirm that the 'D' designation indicates the presence of an internal auto-discharge feature on the output when disabled. Ensure the ordering part number matches the exact 3.6V fixed output requirement before finalizing procurement.

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

Select this component when a compact footprint is required alongside high PSRR performance. The X2-DFN1010-4 package offers minimal board space utilization compared to traditional SOT packages. Consider the 3.6V fixed output specifically for applications requiring direct regulation from single-cell lithium sources without additional boosting stages.

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

This part belongs to the AP7343 series of low-noise LDOs designed for handheld communication equipment. The series includes various fixed output voltages ranging from 0.9V to 3.6V. The 'D' variant specifically includes an output discharge resistor, distinguishing it from non-discharge versions in the same family.

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

AP7343-36FS4-7B is the non-discharge equivalent within the same package. AP7343D-36W5-7B provides identical electrical characteristics but uses the SOT25 package instead of X2-DFN1010-4.