AS1376-BTDT-12

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

The AS1376-BTDT-12 is a dual supply rail linear regulator delivering 1A load current with 67µA typical ground current. It features a low dropout of 120mV at 1A and operates with VIN from 0.7V to 3.6V and VBIAS from 2.5V to 5.5V. The fixed output voltage is 1.2V with ±2% accuracy. Shutdown current is typically 20nA, and the device includes over-temperature, over-current, and under-voltage protection in an 8-pin TDFN package.

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

• Dual supply architecture using N-channel pass transistor for improved low input voltage performance
• Integrated auto-discharge path to rapidly discharge load capacitance during shutdown
• Comprehensive internal protection against over-temperature, over-current, and under-voltage conditions
• Chip enable input allows precise control of power consumption with ultra-low shutdown current

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

• Powering cordless and mobile phones
• Supplying MP3 players and digital cameras
• powering PDAs and hand-held computers
• Battery-powered portable devices

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

Verify the specific ordering code AS1376-BTDT-12 matches the required 1.2V output specification. Confirm the 8-pin TDFN package dimensions align with the PCB footprint design. Ensure the application circuit respects the maximum input voltage limits for both VIN and VBIAS pins. Check for RoHS compliance status if required by manufacturing standards. Validate thermal dissipation requirements based on the expected load current and ambient temperature conditions.

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

Select this component when a low dropout voltage is critical at high currents near 1A. The dual supply requirement makes it suitable for post-regulation after DC-DC converters. Consider the 20nA shutdown current for battery life optimization. Ensure the available bias supply voltage meets the minimum 2.5V requirement. Evaluate the need for external capacitors based on stability guidelines provided in the datasheet.

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

The AS1376 series is manufactured by ams AG, formerly austriamicrosystems AG. This specific part belongs to the LDO regulator family designed for mobile and handheld applications. The BTDT suffix indicates the tape and reel packaging format and the 8-pin TDFN physical package type. The -12 designation specifies the factory-set 1.2V output voltage.

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

Direct substitutes include other parts from the AS1376 series with different output voltages, such as AS1376-BTDT-10 or AS1376-BTDT-08, if the voltage requirement changes. Verify pin compatibility and thermal characteristics before substitution.

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

How does the dual supply architecture benefit low input voltage operation?

The dual supply architecture uses an N-channel pass transistor biased by VBIAS, ensuring the transistor remains above its threshold voltage even when VIN is very low, improving dropout performance compared to single-supply P-channel designs.

What is the function of the auto-discharge feature?

The auto-discharge feature connects a 100Ω path between the output and ground during shutdown, rapidly discharging load capacitance to prevent reverse current flow through the internal body diode when VOUT exceeds VIN.