AS13985F30-T

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

The AS13985F30-T is a micropower low-dropout linear regulator delivering a fixed 3.0V output at up to 150mA. It operates from an input voltage range of 2.5V to 5.5V with a typical dropout voltage of 45mV at full load. The device features ultra-low noise, reducible to 30µV RMS via a bypass pin, and maintains 1% output voltage accuracy across the -40°C to +125°C junction temperature range. Quiescent current is 95µA in active mode and drops below 1µA during shutdown. Stability is ensured with ceramic capacitors between 1µF and 22µF.

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

• Ultra-low dropout performance ensures efficient regulation even under minimal voltage headroom conditions.
• Integrated bypass functionality allows for significant reduction of output noise for sensitive circuitry.
• Automatic sleep mode minimizes power consumption when the enable pin is deactivated.
• Built-in thermal and over-current protection safeguards against operational stress.

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

• Mobile phones
• Personal Digital Assistants (PDAs)
• MP3 players
• Handheld computers

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

Verify that the specific ordering code matches the required output voltage and package type. Confirm RoHS compliance status as indicated in official documentation. Ensure the design accommodates the specified minimum and maximum operating temperatures. Check datasheet requirements for external capacitor values to guarantee stability.

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

Select this component for battery-powered designs requiring high efficiency and low noise. The WLP package suits space-constrained applications, while SOT23 offers alternative mounting. Verify that the load current does not exceed 150mA and that the input voltage remains within the 2.5V to 5.5V range. Consider the bypass pin connection if noise sensitivity exceeds standard specifications.

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

This part belongs to the AS13985 series of micropower LDO regulators manufactured by austriamicrosystems AG. The series provides multiple fixed output voltage options ranging from 1.2V to 5.0V. The F suffix denotes the 5-bump Wafer Level Package variant, distinguishing it from the H suffix SOT23 version.

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

Other AS13985 variants with different output voltages or packages may serve as functional substitutes if electrical parameters align. Cross-reference tools should be used to identify compatible alternatives from other manufacturers, ensuring pin compatibility and performance matching.

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

What is the maximum output noise voltage?

The output noise voltage is typically 30µV RMS when measured between 10Hz and 100kHz with a 10nF capacitor on the bypass pin.

How is the device enabled or disabled?

The device is enabled when the EN pin voltage is greater than or equal to 1.2V and disabled when the voltage is less than or equal to 0.4V.