AS1359-BTTT-45

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

The AS1359-BTTT-45 is a low-dropout linear regulator delivering up to 300mA continuous output current with a preset voltage of 4.5V. It features ultra-low noise (9µVRMS) and high PSRR (>80dB). The device operates within an input voltage range of 2V to 5.5V, maintaining stability with only a 1µF ceramic output capacitor. Quiescent current is extremely low at 40µA, dropping below 500nA in shutdown mode. It includes integrated overcurrent and thermal protection mechanisms.

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

• Ultra-low noise architecture achieving 9µVRMS output voltage noise
• High power-supply rejection ratio exceeding 80dB across frequency ranges
• Integrated P-channel MOSFET pass transistor for minimal quiescent current consumption
• Built-in overcurrent limiting and thermal shutdown protection circuits

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

• Mobile phones and wireless communication devices
• Personal Digital Assistants (PDAs) and handheld computers
• Bluetooth portable radios and accessories
• Wireless LAN equipment and digital cameras
• Battery-powered personal audio devices

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

Verify the specific ordering code matches the required output voltage and load current specifications. Confirm package type and delivery form align with manufacturing requirements. Ensure compliance with RoHS standards and lead-free finish specifications. Check for any additional processing needs if operating outside standard commercial temperature ranges or reliability thresholds.

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

Select this component when space constraints require a small TSOT23 5-pin package. Choose this regulator for applications demanding ultra-low noise performance for sensitive analog circuits. Consider this part for battery-powered systems requiring extended runtime due to low quiescent current. Ensure the load current does not exceed 300mA and verify compatibility with 1µF ceramic capacitors for stability.

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

This device belongs to the AS1358/AS1359 family of ultra-low-noise LDOs from austriamicrosystems AG. The AS1359 variant specifically supports higher continuous output currents compared to the AS1358. Both models share identical architectural features, including noise bypass capabilities and shutdown logic, designed for portable electronics.

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

Direct substitutes include other parts from the AS1358/AS1359 series with matching output voltages and current ratings. Verify pin compatibility and electrical characteristics before substitution. No alternative part numbers are explicitly confirmed as direct replacements in the provided documentation.