AS1328B-BQFT-AD

Overview

The AS1328B-BQFT-AD is a high-efficiency synchronous step-down DC/DC converter manufactured by ams OSRAM. It integrates a 40V N-channel power switch and operates with an input voltage range of 2.7V to 6V. The device delivers a continuous output current of up to 1.5A and supports adjustable output voltages from 0.8V to 5.5V. It features a fixed switching frequency of 1.5MHz, selectable via an external resistor or pin configuration. The IC includes comprehensive protection mechanisms such as over-current protection, thermal shutdown, and soft-start functionality. Packaged in a compact 10-DFN (3x3mm) exposed pad format, it is designed for space-constrained portable applications requiring efficient power management.

Feature Summary

• Integrates a low-resistance synchronous N-channel power switch for high efficiency
• Supports flexible switching frequency selection to optimize component size and performance
• Includes built-in over-current protection and thermal shutdown for system reliability
• Features programmable soft-start to limit inrush current during startup

Applications

• Portable consumer electronics powered by single-cell lithium-ion batteries
• Smartphones and mobile communication devices requiring efficient voltage regulation
• Tablets and handheld gaming consoles with multiple voltage rails
• Personal digital assistants and wearable technology

Procurement Notes

Verify the specific suffix 'BQFT-AD' against official ams OSRAM documentation to confirm package type, tape-and-reel specifications, and lead-free status. Ensure compatibility with your PCB footprint for the 10-DFN package. Check for RoHS compliance certificates if required by your manufacturing standards. Confirm availability through authorized distributors as supply levels may vary.

Selection Notes

Select this component when a compact, high-efficiency buck converter is needed for inputs between 2.7V and 6V. It is suitable for applications requiring up to 1.5A load current with minimal external components. Consider the 1.5MHz switching frequency for smaller inductor sizes compared to lower-frequency alternatives. Ensure the thermal design accommodates the power dissipation in the DFN package under maximum load conditions.

Part Context

The AS1328B belongs to a family of synchronous step-down converters designed for portable electronics. It complements other PMIC solutions from ams OSRAM by providing dedicated voltage regulation for logic cores and peripherals. The device addresses the need for high efficiency and small solution size in battery-powered devices where space and power consumption are critical constraints.

Replacement Considerations

Check for direct pin-compatible replacements within the AS13xx series or equivalent offerings from other manufacturers that support 1.5A output and 40V input. Verify that any substitute maintains the same switching frequency options and control interface. Ensure thermal performance and protection features meet or exceed the original specifications.