AS13985H27-T

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

The AS13985H27-T is a micropower low-dropout linear regulator delivering 150mA output current. It provides a fixed 2.7V output voltage with 1% accuracy. The device operates within a 2.5V to 5.5V input range and features ultra-low dropout voltage, typically 45mV at full load. Quiescent current is 95µA in active mode and drops below 1µA in shutdown. It includes integrated over-temperature and over-current protection. Stability is ensured with ceramic capacitors from 1µF to 22µF. Output noise can be reduced to 30µV RMS using a bypass capacitor.

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

• Ultra-low dropout voltage ensures efficient power delivery under minimal headroom conditions.
• Integrated thermal and current protection safeguards against overload scenarios.
• Low quiescent current extends battery life in portable electronic applications.
• Capable of driving noise-sensitive circuits directly without additional filtering.

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

• Cordless and mobile phones
• MP3 players and audio devices
• PDAs and handheld computers
• Digital cameras

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

Verify the specific ordering code matches the required package type and output voltage. Confirm that the component meets RoHS compliance standards for environmental regulations. Ensure the supplier provides valid traceability documentation for quality assurance purposes. Check datasheet revisions for any updates to electrical characteristics or pin assignments before finalizing procurement specifications.

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

Select this regulator for designs requiring stable performance with low-ESR ceramic output capacitors. Consider the SOT23-5 package for space-constrained PCB layouts. Evaluate the thermal resistance requirements based on ambient temperature and power dissipation limits. Ensure the enable pin logic levels align with the system control signals for proper activation and shutdown sequencing.

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

This component belongs to the AS13985 series of micropower LDOs manufactured by austriamicrosystems AG. The series offers multiple fixed output voltage options ranging from 1.2V to 5.0V. Variants are available in both 5-bump WLP and 5-pin SOT23 packages. The H suffix indicates the SOT23 package configuration, while the T suffix denotes tape and reel delivery.

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

Compatible substitutes include other AS13985 variants with different fixed output voltages, such as AS13985H33-T for 3.3V or AS13985H18-T for 1.8V. Cross-reference electrical parameters like dropout voltage and quiescent current when selecting alternative manufacturers' parts to ensure functional equivalence in the circuit design.