AP7343-285FS4-7B

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

The AP7343-285FS4-7B is a fixed-output low dropout regulator manufactured by Diodes Incorporated, providing a precise 2.85V 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 performance of 75dB at 1kHz alongside low output noise of 60µVrms from 10Hz to 100kHz. The device incorporates an enable pin for power management control and includes internal protections such as thermal shutdown and fold-back short-circuit limiting. It is housed in an X2-DFN1010-4 (Type B) package suitable for dense PCB layouts.

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

• Integrated enable input allows for active power switching between operational and shutdown modes
• High ripple rejection capability ensures stable regulation against input line noise
• Low output noise characteristic supports sensitive analog and RF circuit requirements
• Built-in thermal shutdown and short-circuit protection safeguard the device under fault conditions

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

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

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

Verify that the ordering suffix FS4 corresponds to the X2-DFN1010-4 package type and 7B indicates tape and reel packaging. Confirm the middle digits 285 match the required 2.85V fixed output voltage. Ensure the base part number AP7343 without the 'D' suffix aligns with non-discharge requirements if applicable. Cross-reference the manufacturer's latest datasheet revision to confirm electrical characteristics remain unchanged.

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

Select this component when a compact footprint is required for portable applications due to its small surface mount package. Choose this specific voltage variant only if the system design strictly requires a 2.85V rail. Consider the quiescent current specifications for battery-powered devices where standby consumption is critical. Verify that the input voltage source remains within the specified operating range to ensure proper regulation.

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

This device belongs to the AP7343 family of low dropout regulators designed for low-power handheld communication equipment. The series offers various fixed output voltages ranging from 0.9V to 3.6V. It utilizes a CMOS process to achieve high accuracy and low power consumption. The family shares common architectural features including error amplifiers and current limit circuits across different output voltage options.

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

AP7343-285W5-7B provides the same electrical specifications in an SOT25 package.