AP7331-18WG-7

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

The AP7331-18WG-7 is a fixed-output low dropout linear regulator manufactured by Diodes Incorporated. It provides a regulated 1.8V output with a maximum continuous load current of 300mA. The device operates within an input voltage range of 2V to 6V and features a typical quiescent current of 65µA across the full load range. It incorporates built-in current limit, short circuit protection, and thermal shutdown circuitry. The component is housed in a surface-mount SOT-25 package and supports an ambient operating temperature range from -40°C to +85°C.

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

• Integrated enable pin for active-high power control
• Fast transient response capability for rapidly changing loads
• Stable operation using low ESR ceramic capacitors
• Built-in over-current and thermal protection mechanisms

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

• Battery powered equipment
• Wireless LAN cards
• XDSL routers
• Desktop and notebook computers

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

Verify that the ordering suffix matches the required specifications. Confirm the 'W' designation corresponds to the SOT-25 package type and the '-7' indicates tape and reel packaging. Ensure the middle digits '18' align with the required 1.8V fixed output voltage. Cross-reference the manufacturer part number against official Diodes Incorporated documentation to confirm authenticity and revision status before procurement.

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

Select this component when a fixed 1.8V rail is required with up to 300mA capacity. It is suitable for applications needing fast start-up times and excellent line/load transient response. Verify that the input voltage remains between 2V and 6V. Ensure the PCB layout accommodates the SOT-25 footprint and utilizes appropriate ceramic output capacitance for stability.

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

This part belongs to the AP7331 series of low dropout regulators designed for portable electronics. The series offers both adjustable and fixed output options in SOT-25 and DFN2020-6 packages. The AP7331-18WG-7 specifically targets applications requiring a stable 1.8V supply with minimal ground current consumption and robust protection features.

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

Compatible substitutes include other AP7331 variants with different fixed output voltages or the adjustable version (AP7331-ADJ). Alternative packages such as DFN2020-6 are available within the same family.