AS1372-BWLT-15

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

The AS1372-BWLT-15 is a dual supply rail linear regulator providing a fixed 1.5V output with a maximum current of 350mA. It operates with an input voltage range of 0.7V to 4.5V and a bias supply voltage of 2.5V to 5.5V. The device features a dropout voltage of 135mV at full load, output accuracy of ±1.5%, and shutdown current of 10nA. It includes overcurrent and thermal protection, operates from -40°C to +85°C, and is housed in a 5-bumps CS-WLP package.

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

• Dual supply architecture utilizing separate VIN and VBIAS pins for improved efficiency and faster transient response
• Ultra-low quiescent and shutdown currents designed for battery-powered applications
• Integrated protection mechanisms including overcurrent limiting and thermal shutdown

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

• Cordless and mobile phones
• MP3 players and PDAs
• Hand-held computers and digital cameras

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

Verify the specific ordering code AS1372-BWLT-15 against manufacturer documentation to confirm the 1.5V fixed output configuration. Ensure compatibility with the required 5-bumps CS-WLP package dimensions and soldering profiles. Confirm that the application design accommodates the necessary external capacitors for stability and bypassing as specified in the datasheet.

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

Select this component when ultra-low voltages are required alongside high efficiency and fast transient response. The dual supply approach allows independent optimization of the pass transistor drain-source voltage compared to traditional single-supply LDOs. It is suitable for systems where minimizing power consumption during standby and maintaining regulation under heavy loads are critical priorities.

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

The AS1372 belongs to a series of low-dropout regulators designed for portable electronics. It utilizes a dedicated bias supply to drive an N-channel MOSFET pass transistor, distinguishing it from standard PMOS-based designs. This architecture enables superior performance metrics in terms of dropout voltage and load transient handling within a compact wafer-level package.

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

Check for other variants within the AS1372 family offering different fixed output voltages if system requirements change. Verify pinout and package compatibility before substituting with similar dual-rail regulators from other manufacturers.

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

How does the dual supply architecture improve performance?

It allows the drain-source voltage of the output transistor to be set independently from the core circuitry, ensuring optimal efficiency and reduced dropout even at very small output voltages.

What protection features are integrated into the AS1372?

The device includes integrated short-circuit protection, overcurrent limiting, and thermal shutdown which activates at 150°C to prevent damage during sustained fault conditions.