AS1359-BTTT-18

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

The AS1359-BTTT-18 is a low-dropout linear regulator (LDO) manufactured by ams OSRAM USA INC. It provides a fixed 1.8V output with a maximum continuous load current of 300mA. The device operates within an input voltage range of 2V to 5.5V and achieves a typical dropout voltage of 140mV at full load. Key electrical characteristics include an ultra-low output noise of 9µVRMS, a power-supply rejection ratio exceeding 80dB up to 10kHz, and a quiescent current of 40µA. It incorporates integrated overcurrent and thermal protection mechanisms.

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

• Ultra-low noise architecture delivering 9µVRMS output noise for sensitive analog circuits
• High power-supply rejection ratio exceeding 80dB across the frequency spectrum
• Integrated P-channel MOSFET pass transistor enabling extremely low quiescent current consumption
• Built-in overcurrent limiting and thermal shutdown protection for fault tolerance

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

• Mobile phones and wireless communication devices
• Bluetooth portable radios and accessories
• Digital cameras and personal audio devices
• Battery-powered handheld computers and PDAs

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

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm package integrity upon receipt, as the TSOT23-5 form factor is susceptible to mechanical stress during handling. Ensure storage conditions comply with moisture sensitivity levels prior to soldering. Cross-reference ordering codes to validate specific voltage and current ratings against project requirements.

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

Select this component when designing space-constrained portable electronics requiring stable power delivery under varying load conditions. The 300mA capacity supports high-drain peripherals while maintaining minimal ground current draw. Evaluate input-output voltage differentials to ensure operation remains within the specified dropout limits. Consider the 1µF ceramic capacitor requirement for stability optimization in compact PCB layouts.

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 mobile applications. While the AS1358 variant offers 150mA output capability, the AS1359 provides double the current capacity at 300mA. Both share identical architectural features, including the same TSOT23-5 packaging and noise reduction specifications, differing primarily in their maximum load current ratings.

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

Public confirmed substitute part numbers are not available in the provided documentation.