S-8533A28AFT-TB-U

Overview

The S-8533A28AFT-TB-U is a positive output step-down DC-DC controller IC manufactured by ABLIC Inc. It operates within an input voltage range of 900 mV to 10 V and provides a fixed output voltage of 2.8 V. The device supports a maximum output current of 300 mA and features a low quiescent current of 3 uA. It functions at a switching frequency of 250 kHz and includes clock synchronization capabilities. The component is housed in an 8-TSSOP package with dimensions of 4.40 mm width and is rated for operation between -40°C and +85°C.

Feature Summary

• Integrates buck regulator control logic for efficient step-down power conversion
• Supports external clock synchronization for noise reduction and system timing alignment
• Features ultra-low quiescent current consumption for enhanced energy efficiency
• Provides fixed output voltage regulation with high accuracy

Applications

• Portable electronic devices requiring efficient power management
• Battery-powered systems needing extended operational life
• Embedded circuits utilizing synchronous buck topologies
• Industrial equipment operating within standard temperature ranges

Procurement Notes

Verify the specific suffix 'TB-U' against official ABLIC documentation to confirm pinout, tolerance, and tape-and-reel specifications. Ensure compatibility with the required 8-TSSOP footprint and thermal requirements. Cross-reference the fixed 2.8 V output setting with circuit design needs. Confirm that the 250 kHz switching frequency aligns with electromagnetic interference constraints in the target application environment.

Selection Notes

Select this controller when a fixed 2.8 V output is required from variable or higher input voltages up to 10 V. Consider its low quiescent current for battery-sensitive applications. Evaluate the need for clock synchronization to mitigate noise in sensitive analog sections. Verify that the external component selection supports the 300 mA output current capability and the 250 kHz switching frequency without exceeding thermal limits.

Part Context

This component belongs to the S-8533 series of DC-DC switching controllers from ABLIC Inc. The series focuses on high-efficiency power management solutions for portable and industrial electronics. The S-8533 family typically offers various fixed output voltages and packaging options to suit different design constraints while maintaining low power consumption profiles.

Replacement Considerations

Direct substitutes include other variants within the S-8533 series offering similar electrical characteristics. Check for alternative part numbers with matching output voltage and package type. Verify functional equivalence regarding clock sync support and quiescent current levels before implementation.