AS1359-BTTT-27

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

The AS1359-BTTT-27 is a low-dropout linear regulator delivering 300mA output current with a preset voltage of 2.7V. It operates within a 2V to 5.5V input range and achieves a dropout voltage of 140mV at full load. The device features ultra-low output noise of 9µVRMS and high power-supply rejection ratio exceeding 80dB up to 10kHz. Quiescent current is maintained at 40µA, dropping below 500nA in shutdown mode. Stability is ensured using only a 1µF ceramic output capacitor.

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

• Ultra-low noise architecture providing 9µVRMS output voltage noise for sensitive analog circuits
• Integrated P-channel MOSFET pass transistor enabling extremely low quiescent current consumption
• High power-supply rejection ratio ensuring stable operation under varying supply conditions
• Optimized stability characteristics allowing use with small-value ceramic capacitors

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

• Mobile phones and wireless communication devices
• Personal digital assistants and handheld computers
• Bluetooth portable radios and accessories
• Digital cameras and personal audio devices

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

Verify the specific ordering code AS1359-BTTT-27 against official manufacturer documentation to confirm the 2.7V preset output and 300mA continuous current rating. Ensure compatibility with the TSOT23 5-pin package dimensions and thermal requirements. Confirm RoHS compliance status prior to integration into final assemblies.

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

Select this component when designing battery-powered systems requiring precise voltage regulation with minimal power loss. The low dropout characteristic maximizes usable battery life. The ultra-low noise profile makes it suitable for powering RF sections or precision analog sensors where signal integrity is critical compared to standard regulators.

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

This part belongs to the AS1358/AS1359 series of ultra-low-noise LDOs designed for space-constrained applications. While the AS1358 variant provides 150mA, the AS1359 delivers 300mA. Both share identical architectural features including integrated thermal protection, current limiting, and a dedicated noise bypass pin for enhanced performance in portable electronics.

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

Direct substitutes include other parts from the AS1358/AS1359 family with matching voltage and current ratings. Verify that alternative components support 1µF ceramic output capacitors and maintain similar PSRR specifications to ensure circuit stability without redesigning the passive filter network.