AUR9705AGD

Overview

The AUR9705AGD is a high-efficiency step-down DC-DC voltage converter manufactured by Diodes Incorporated. It utilizes a constant frequency, peak-current mode architecture with built-in synchronous power MOSFETs and internal compensators to minimize external component requirements. The device features an internal switching frequency of 1.5MHz, enabling the use of small surface-mount inductors and capacitors suitable for portable applications. It automatically switches between normal PWM mode and LDO mode to optimize system power efficiency across varying load conditions. The input voltage range spans from 2.5V to 5.5V.

Feature Summary

• Integrates synchronous power MOSFET switchers and internal compensators to reduce external part counts.
• Automatically transitions between PWM and LDO modes to maintain high efficiency under diverse loading conditions.
• Includes built-in oscillator and timing capacitors for a fixed 1.5MHz switching frequency.

Applications

• Portable electronic devices requiring compact power solutions
• Battery-powered systems optimizing for wide-range load efficiency
• Applications necessitating reduced external component count

Procurement Notes

Verify the specific package configuration against design requirements, as the AUR9705 series includes variants such as WDFN-2x2-6 and TSOT-23-5. Confirm that the selected variant matches the thermal and spatial constraints of the target PCB layout. Ensure compatibility with the required output voltage range and current delivery specifications before finalizing procurement decisions.

Selection Notes

Select this component for designs prioritizing high efficiency across variable loads due to its automatic mode switching capability. The integrated synchronous rectification and internal compensation simplify the bill of materials. Consider the 1.5MHz frequency when selecting passive components, as it allows for smaller inductor and capacitor sizes compared to lower-frequency alternatives.

Part Context

The AUR9705AGD belongs to the AUR9705 family of buck converters from Diodes Incorporated. This series is designed for general-purpose step-down conversion in space-constrained environments. The AGD suffix typically denotes a specific package and temperature grade variant within the broader product line, distinct from other suffixes like AGH which may indicate different packaging or status.

Replacement Considerations

Publicly documented substitutes include the AP3428AWT-7. Verify pinout compatibility and electrical parameter alignment before substitution.