AS1346-BTDT-3318

Overview

The AS1346-BTDT-3318 is a dual-output synchronous buck DC-DC switching regulator manufactured by ams OSRAM. It provides fixed output voltages of 3.3V and 1.8V with maximum output currents of 500mA and 950mA, respectively. The device operates from an input voltage range up to 5.5V and integrates a 2MHz switching frequency for compact passive component sizing. Housed in a 12-TDFN (3x3mm) package with an exposed pad, it supports surface mount installation and functions within a junction temperature range of -40°C to +85°C.

Feature Summary

• Dual independent regulated outputs providing simultaneous 3.3V and 1.8V rails
• Synchronous rectification topology for enhanced conversion efficiency
• Integrated high-frequency switching operation minimizing external component footprint
• Fixed voltage configuration simplifying system design and layout

Applications

• Portable electronic devices requiring multiple low-voltage power rails
• Embedded systems needing efficient step-down regulation from single-cell sources
• Battery-powered consumer electronics with space-constrained PCB layouts

Procurement Notes

Verify the specific suffix 'BTDT' against current manufacturer documentation to confirm pinout and thermal pad specifications. Confirm availability status as distribution channels may list obsolete or end-of-life inventory. Ensure compatibility with existing PCB footprints before procurement, as package variations can exist within the same base model number.

Selection Notes

Select this component when a dual-rail solution is required to save board space compared to using two separate regulators. The fixed 3.3V and 1.8V outputs suit applications where these standard logic levels are needed without external resistor programming. Consider the 2MHz frequency for smaller inductor selection if miniaturization is a priority over ultra-low noise performance.

Part Context

This part belongs to the AS134x series of dual-output buck converters from ams OSRAM. These devices are designed for mobile and portable applications where power efficiency and small form factor are critical. The series typically features integrated switches and control circuitry to reduce external bill of materials.

Replacement Considerations

Publicly confirmed substitute part numbers for this specific variant are not available in the provided source data. Consult manufacturer cross-reference tools for parametrically similar dual-output buck regulators.