AS1371-BTDT-105

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

The AS1371-BTDT-105 is a low-dropout linear regulator manufactured by ams-OSRAM USA INC. It delivers a fixed output voltage of 1.05V with a maximum load current of 400mA. The device operates within an input voltage range of 1.2V to 3.6V and features ultra-low quiescent current consumption, typically 15µA at no load and 50µA at full load. Dropout voltage is specified as 20mV at 100mA and 80mV at 400mA. It includes integrated overcurrent, thermal shutdown, and under-voltage lockout protections, housed in a 6-pin 2x2 TDFN package.

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

• Ultra-low dropout voltage performance enables efficient operation with minimal input-to-output voltage differentials.
• Integrated power management features include chip enable control, power-good indication, and low battery detection capabilities.
• Robust protection mechanisms safeguard against short circuits, thermal overload, and erratic operation during low input voltages.

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

• Powering portable processor cores from existing 1.8V or 2.5V outputs
• Single primary cell operation in small applications
• Battery-powered hand-held devices

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

Verify the specific ordering code AS1371-BTDT-105 against official manufacturer documentation to confirm the 1.05V fixed output specification. Ensure compatibility with the required 6-pin 2x2 TDFN package dimensions for PCB layout. Confirm that the application environment remains within the -40°C to +85°C operating temperature range to maintain guaranteed electrical characteristics.

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

Select this component when designing systems requiring a stable 1.05V rail from a single-cell or low-voltage source. The low quiescent current makes it suitable for battery-operated equipment where standby power consumption must be minimized. Verify that the expected load current does not exceed the 400mA limit and that thermal dissipation constraints are met within the TDFN package.

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

This part belongs to the AS1371 series of low-input voltage, low-quiescent current LDO regulators. The series offers various fixed output voltages ranging from 0.6V to 3.3V in 50mV steps. All variants share the same 400mA output capability and 6-pin TDFN packaging, differing primarily in their internal feedback resistor networks to set the nominal output voltage.

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

Consult the manufacturer's cross-reference tools for compatible alternatives if supply chain issues arise. Verify that any substitute device matches the 1.05V output, 400mA current rating, and 6-pin TDFN footprint to ensure mechanical and electrical interchangeability without redesigning the host circuit board.

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

What is the function of the SENSE pin on the AS1371?

The SENSE pin allows for external voltage monitoring via a resistive divider network. If connected to GND, it activates an internal divider to monitor the output voltage for the Power-OK feature.

How does the AS1371 handle thermal overload conditions?

The device incorporates thermal shutdown protection that activates when the junction temperature reaches 150°C. It shuts down the output and restarts automatically once the temperature drops by approximately 15°C.