AS1367-BTDT-18

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

The AS1367-BTDT-18 is a fixed-output, adaptive low-dropout linear regulator manufactured by ams OSRAM. It provides a stable 1.8V output with a maximum load current of 150mA. The device operates within an input voltage range of 2.0V to 5.5V and features a typical quiescent current of 10µA. Key electrical parameters include a dropout voltage of 110mV at full load, a power-supply rejection ratio of 60dB at 10kHz, and an output noise of 15µV RMS. Integrated protections include overcurrent limiting, thermal shutdown at 160°C, under-voltage lockout, and reverse polarity protection.

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

• Adaptive operation automatically switches between light-load and heavy-load modes to optimize efficiency and minimize power consumption across varying output currents.
• Integrated Power-OK (POK) open-drain output actively indicates when the regulated voltage is within specification, providing a power-on-reset function without external components.
• Comprehensive protection suite includes short-circuit endurance, overcurrent limiting, thermal overload shutdown, and under-voltage lockout to ensure reliable operation in fault conditions.

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

• Cellular phones
• Cordless phones
• Wireless communication equipment
• Portable audio-video equipment

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

Verify the specific ordering code AS1367-BTDT-18 against manufacturer documentation to confirm the 1.8V fixed output variant. Ensure compatibility with the required 8-pin TDFN 2x2 surface-mount package for PCB layout. Confirm that the application environment remains within the specified -40°C to +85°C operating temperature range. Check for any RoHS compliance requirements if applicable to the final assembly process.

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

Select this component when a precise 1.8V rail is required from a 2.0V to 5.5V source with minimal static power draw. The adaptive architecture suits battery-powered systems where efficiency varies significantly with load. Verify that the 150mA maximum output current meets peak demand. Consider the 110mV dropout voltage to ensure sufficient headroom between input and output during low-battery conditions.

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

The AS1367 series belongs to a family of adaptive LDO regulators designed for portable electronics. This specific model represents the 1.8V fixed-output configuration within the broader product line, which also includes variants for 1.2V, 3.0V, 3.3V, and 4.5V outputs. All variants share the same 8-pin TDFN 2x2 package and core protection features.

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

Direct substitutes include other AS1367-BTDT variants with different fixed output voltages (e.g., AS1367-BTDT-33 for 3.3V) if the voltage requirement changes. No alternative part numbers are confirmed as electrically identical replacements in the provided documentation.