AP7343D-28FS4-7B

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

The AP7343D-28FS4-7B is a fixed-output low dropout regulator manufactured by Diodes Incorporated, providing a stable 2.8V 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 and includes internal protections such as thermal shutdown and current limiting. Packaged in the compact X2-DFN1010-4 (Type B) format, it supports surface-mount assembly.

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

• Integrated enable pin allows for precise power management and system shutdown control
• High ripple rejection capability ensures clean power delivery for sensitive RF applications
• Built-in discharge function rapidly removes residual charge from the output capacitor upon disable

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

• RF power supplies
• Portable media players
• Wireless communication devices

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 inclusion of the auto-discharge feature, which affects the turn-off behavior compared to 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 fixed 2.8V rail is required with minimal footprint constraints. The X2-DFN1010-4 package offers superior thermal dissipation characteristics compared to smaller alternatives. Consider the auto-discharge feature if rapid output voltage decay is necessary during standby modes. Verify that the input voltage remains above the dropout threshold across the full load and temperature range.

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 equipment. The series provides various fixed output voltages ranging from 0.9V to 3.6V. The 'D' suffix specifically denotes the version with an integrated output discharge resistor, distinguishing it from standard versions without this feature.

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

AP7343-28FS4-7B serves as a direct functional substitute but lacks the built-in discharge feature found in the AP7343D variant.