AP7343D-26W5-7

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

The AP7343D-26W5-7 is a fixed-output low dropout regulator manufactured by Diodes Incorporated, providing a stable 2.6V 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 alongside low output noise of 60µVrms from 10Hz to 100kHz. The device incorporates an enable pin for power management and includes built-in short-circuit protection and thermal shutdown. Packaged in the compact SOT-25-5 format, it supports ambient operating temperatures from -40°C to +85°C.

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

• Integrated discharge function ensures rapid output voltage decay when disabled
• High ripple rejection capability minimizes power supply noise impact
• Low quiescent current design optimizes battery life in portable devices
• Built-in thermal shutdown and fold-back current limit protect against overload

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

• RF power supply circuits
• Portable video equipment
• Wireless communication modules
• Camera systems

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

Verify the specific suffix 'D' indicates the inclusion of the auto-discharge feature on the output node, distinguishing it from standard variants. Confirm the 'W5' designation corresponds to the SOT-25 package type required for your PCB layout. Ensure the ordering code matches the exact 2.6V output requirement, as this parameter is fixed per part number. Cross-reference the manufacturer's latest datasheet revision to confirm compliance with current environmental directives.

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

Select this component when a precise 2.6V rail is needed with minimal footprint constraints. The SOT-25 package offers a balance between thermal performance and space efficiency. Consider the integrated discharge feature if system power-down sequencing requires fast output capacitor discharge. Verify that the input voltage remains above the dropout threshold across all load conditions to maintain regulation stability.

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

This device belongs to the AP7343 family of CMOS low-dropout regulators designed for low-power handheld applications. The series provides various fixed output voltages ranging from 0.9V to 3.6V. The 'D' suffix specifically denotes the version with an internal discharge resistor, while 'W5' identifies the five-pin SOT-25 surface-mount package configuration used for dense board layouts.

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

AP7343-26W5-7 (Non-discharge variant)

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

What is the function of the 'D' suffix in the part number?

The 'D' suffix indicates that the regulator includes an internal N-channel discharge resistor connected to the output, which actively pulls the output voltage down when the enable pin is low.

How does the enable pin control the device operation?

Driving the EN pin high turns the regulator on, while pulling it low activates the shutdown mode and engages the discharge function if present, ensuring the output voltage decays rapidly.