AS13985F27-T

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

The AS13985F27-T is a micropower low-dropout linear regulator delivering a fixed 2.7V output at up to 150mA. It operates from a 2.5V to 5.5V input supply with guaranteed stability using ceramic capacitors between 1µF and 22µF. The device features ultra-low dropout voltage, typically 45mV at full load, and maintains high line and load regulation across the operating temperature range of -40°C to +125°C. Integrated protections include over-current limiting and thermal shutdown.

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

• Ultra-low dropout performance ensures efficient operation even when input voltage approaches the output level.
• Integrated bypass pin allows for noise reduction to 30µV RMS for sensitive analog circuits.
• Automatic sleep mode minimizes quiescent current consumption during inactive periods.
• Robust protection mechanisms safeguard against thermal overload and short-circuit conditions.

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 per manufacturer specifications. Ensure proper handling procedures are followed due to moisture sensitivity classification. Cross-reference datasheet revision numbers to guarantee accurate electrical characteristics and pin assignments during procurement.

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

Select this component for battery-powered designs requiring stable voltage regulation with minimal external components. Verify that the chosen output capacitor falls within the specified 1µF to 22µF range to ensure stability. Consider the thermal dissipation requirements based on the junction-to-ambient resistance values provided in the datasheet for the selected package configuration.

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 offers multiple fixed output voltage options ranging from 1.2V to 5.0V. It is designed specifically for portable electronics where power efficiency and small form factor are critical design constraints.

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

Direct substitutes include other AS13985 variants with different fixed output voltages or packages, such as AS13985H27-T for SOT23 packaging. Verify compatibility regarding input voltage ranges and output current capabilities before substitution.

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

What is the maximum recommended output capacitance for stability?

The device is guaranteed stable with ceramic output capacitors ranging from 1µF to 22µF.

How can the output noise be minimized?

A 10nF bypass capacitor connected to the BYPASS pin reduces the output noise voltage to 30µV RMS.