AP7343-33W5-7

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

The AP7343-33W5-7 is a fixed-output low dropout regulator manufactured by Diodes Incorporated, delivering a nominal 3.3V output with a maximum current of 300mA. It operates within an input voltage range of 1.7V to 5.25V and maintains a quiescent current of 35µA. The device features high ripple rejection of 75dB at 1kHz and low output noise of 60µVrms from 10Hz to 100kHz. Packaged in SOT-25-5, it supports an operating ambient temperature range from -40°C to +85°C.

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

• CMOS-based architecture providing high output voltage accuracy and low power consumption
• Integrated enable pin for precise control of the regulator's on/off state
• Built-in short-circuit protection and thermal shutdown mechanisms

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 specific part number matches the required package type and output voltage configuration. Confirm RoHS compliance and lead-free status as specified in the manufacturer documentation. Ensure the ordering suffix corresponds to the correct tape and reel packaging format intended for surface mount assembly processes.

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

Select this component when a stable 3.3V rail is needed for low-power portable electronics requiring minimal footprint. Consider the SOT-25 package for space-constrained designs. Evaluate the input voltage headroom against the dropout characteristics to ensure regulation under varying load conditions.

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

This device belongs to the AP7343 series of low dropout regulators designed for handheld communication equipment. It offers a compact solution with integrated discharge options available in other variants within the same family. The series emphasizes low noise and high PSRR for sensitive analog and RF circuitry.

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

AP7343D-33W5-7 (includes output discharge feature)

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

How does the Enable pin function?

The EN pin must be driven high to enable the regulator or pulled low to enter shutdown mode; it must not be left floating.

What is the typical ripple rejection performance?

The device provides a typical ripple rejection of 75dB at a frequency of 1kHz.