AS1371-BTDT-18

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

The AS1371-BTDT-18 is a low-dropout linear regulator manufactured by ams OSRAM. It provides a fixed 1.8V output with a maximum load current of 400mA. The device operates from an input voltage range of 1.2V to 3.6V and features ultra-low dropout characteristics, specified at 20mV under a 100mA load and 80mV under a 400mA load. Quiescent current consumption is typically 15µA at no load and 50µA at full load. The component includes integrated overcurrent protection, thermal shutdown, and under-voltage lockout. It utilizes a 6-pin 2x2 TDFN package and supports operation across a temperature range of -40°C to +85°C.

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

• Ultra-low dropout voltage performance enables efficient single primary cell operation in battery-powered applications.
• Integrated power management features include chip enable control, power-good indication, and low-battery detection capabilities.
• Robust protection mechanisms safeguard the device against short circuits, thermal overload, and under-voltage conditions.

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

• Powering portable processor cores in mobile phones and PDAs
• Supplying energy to MP3 players and digital cameras
• Providing regulated voltage for hand-held computers and CD/DVD players

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

Verify the specific ordering code suffix to confirm the fixed 1.8V output configuration. Ensure the selected package variant matches the required 6-pin 2x2 TDFN footprint for proper board integration. Confirm that the supply chain source provides official documentation to validate the component's authenticity and compliance with RoHS standards before finalizing procurement decisions.

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

Select this component when designing systems requiring a stable 1.8V rail from inputs as low as 1.2V. The low quiescent current makes it suitable for battery-operated devices where extending operational life is critical. Consider the thermal dissipation requirements based on the maximum power available from the package and environment during high-load scenarios.

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

This part belongs to the AS1371 series of low-input voltage, low-quiescent-current LDOs. The series offers various fixed output voltages ranging from 0.6V to 3.3V in 50mV steps. All variants share the same 6-pin 2x2 TDFN package and core electrical architecture, differing primarily in their factory-set output voltage specifications.

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

AS1371-BTDT-15 (1.5V Output)

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

How does the Power-OK feature function?

The Power-OK pin indicates when the output is within regulation. If the SENSE pin is connected to GND, it monitors the output voltage against an internal threshold. Connecting the SENSE pin externally allows monitoring of other voltages using a resistive divider network.

What are the stability requirements for the output capacitor?

The regulator is stable with ceramic capacitors down to 1µF. For optimal transient response and noise reduction, larger values such as 10µF may be used, provided the Equivalent Series Resistance (ESR) remains within the recommended stability limits.