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Product Detailed Parameters
- Description：IC REG BUCK ADJ 1A TSOT23-5
- Series：-
- Mfr：Diodes Incorporated
- Package：Tape & Reel (TR)
- Function：Step-Down
- Output Configuration：Positive
- Topology：Buck
- Output Type：Adjustable
- Number of Outputs：1
- Voltage - Input (Min)：2.5V
- Voltage - Input (Max)：5.5V
- Voltage - Output (Min/Fixed)：1V
- Voltage - Output (Max)：3.3V
- Current - Output：1A
- Frequency - Switching：1.5MHz
- Synchronous Rectifier：Yes
- Operating Temperature：-40°C ~ 80°C (TA)
- Mounting Type：Surface Mount
- Package / Case：SOT-23-5 Thin, TSOT-23-5
- Supplier Device Package：TSOT-23-5
- Grade：-
- Qualification：-
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Overview
The AUR9705-33GH 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 MOSFET switchers and internal compensators to minimize external component requirements. The device operates at an internal switching frequency of 1.5MHz, enabling the use of compact surface mount inductors and capacitors suitable for portable applications. It features automatic transition between normal PWM mode and LDO mode to optimize system power efficiency across varying load conditions. The unit provides a fixed output voltage of 3.3V, supports an input voltage range from 2.5V to 5.5V, and delivers up to 1A of output current.
Feature Summary
- Integrates synchronous power MOSFETs and internal compensators to reduce external part count
- Automatically switches between PWM and LDO modes for improved efficiency under wide loading conditions
- Includes built-in oscillator and timing capacitors for simplified design
- Provides reliable operation through Soft Start, Under Voltage Lock Out, and Thermal Shutdown Detection
Applications
- Portable electronic devices requiring efficient power conversion
- Battery-powered systems utilizing small surface mount components
- General purpose step-down DC-DC voltage regulation
Procurement Notes
Verify the specific suffix against official Diodes Incorporated documentation to confirm pinout compatibility and package type. Confirm RoHS compliance status and environmental declarations directly from the manufacturer's datasheet or product change notices before integration into production designs.
Selection Notes
Select this component when a fixed 3.3V output is required within a 2.5V to 5.5V input range. Consider the 1.5MHz switching frequency for applications prioritizing small passive component size. Ensure thermal management aligns with the TSOT-23-5 package capabilities for the expected load current.
Part Context
This part belongs to the AUR9705 family of high-efficiency buck converters. The family offers adjustable and fixed output voltage versions capable of delivering up to 1A. Available packages include WDFN-2x2-6 and TSOT-23-5. The series is designed for portable implementations where space and efficiency are critical constraints.
Replacement Considerations
The AUR9705AGH variant is documented as obsolete with AP3428AWT-7 listed as a similar substitute. Verify functional equivalence and pin compatibility with official sources before considering alternatives.
