AP7333-18SAG-7

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

The AP7333-18SAG-7 is a fixed-output low dropout linear regulator manufactured by Diodes Incorporated. It provides a stable 1.8V output with a maximum continuous load current of 300mA. The device operates within an input voltage range of 2V to 6V and maintains a typical quiescent current of 65µA across the full load spectrum. It features a fast start-up time of 80µs and offers excellent line and load transient response. The regulator includes built-in current limit, short circuit, and thermal shutdown protections. It is housed in a 3-pin SOT-23 package and is designed for operation over an ambient temperature range of -40°C to 85°C.

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

• Very low quiescent current consumption of approximately 65µA over the entire load range.
• Fast transient response capability suitable for rapidly changing load conditions.
• Integrated protection mechanisms including current limiting, short circuit protection, and thermal shutdown.
• Stable operation when utilizing low ESR ceramic capacitors as small as 1µF.

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

• XDSL Routers
• Wireless LAN Cards
• Battery Powered Equipments

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

Verify that the component matches the specific 1.8V fixed output designation indicated by the '18' suffix in the part number. Confirm the package type corresponds to the standard SOT-23 configuration associated with the 'SA' code. Ensure compliance with RoHS directives and check for any specific environmental or handling requirements relevant to the manufacturing batch.

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

Select this regulator for applications requiring a fixed 1.8V supply from an input source between 2V and 6V. It is appropriate for designs where low ground current is critical for battery life. Verify that the expected load current does not exceed 300mA and that the power dissipation remains within the thermal limits of the SOT-23 package under worst-case operating conditions.

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

This component belongs to the AP7333 series of low dropout linear regulators. The series is characterized by its ability to deliver up to 300mA with minimal quiescent current draw. The AP7333-18SAG-7 specifically denotes the 1.8V output variant packaged in a green molding SOT-23 case with tape and reel packaging.

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

AP7333-18SRG-7 (SOT23R package variant)

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

What is the minimum required output capacitance for stability?

The device is stable with a minimum output capacitance of 1µF ceramic capacitor.

How does the device protect against overheating?

Thermal shutdown protection disables the output when the junction temperature reaches approximately +140°C and re-enables it when the temperature drops to approximately +125°C.