S-8533A25AFT-TB-G

Overview

The S-8533A25AFT-TB-G is a synchronous PWM control switching regulator manufactured by ABLIC Inc. It operates within an input voltage range of 4.5 V to 26 V and delivers a fixed output voltage of 2.5 V. The device supports up to 1 A of continuous output current with integrated high-side and low-side MOSFETs. Key electrical parameters include a switching frequency selectable between 200 kHz and 1 MHz, a quiescent current of 1.7 mA (typical), and an enable threshold of 1.2 V. It features comprehensive protection mechanisms including overcurrent protection, thermal shutdown, and undervoltage lockout. The component is housed in a compact TSSOP-B8 package suitable for space-constrained designs.

Feature Summary

• Integrated synchronous rectification with internal high-side and low-side power switches
• Adjustable switching frequency ranging from 200 kHz to 1 MHz for optimized efficiency and component size
• Built-in overcurrent protection and thermal shutdown for enhanced system reliability

Applications

• Portable electronic devices requiring efficient step-down conversion
• Industrial equipment power supply modules
• Embedded systems with strict space and efficiency constraints

Procurement Notes

Verify the specific suffix 'G' against the manufacturer's official documentation to confirm lead-free status and tape-and-reel packaging specifications. Ensure that the ordering information matches the exact part number variant required for your bill of materials, as minor suffix differences may indicate distinct packaging or environmental compliance attributes.

Selection Notes

Select this component when a fixed 2.5 V output is required from a 4.5 V to 26 V input source. Consider the adjustable switching frequency feature to balance electromagnetic interference (EMI) performance against external inductor and capacitor sizes. Evaluate the 1 A current capability against peak load requirements to ensure adequate headroom for thermal management within the TSSOP-B8 package.

Part Context

This part belongs to the S-8533A series of synchronous PWM controllers designed for general-purpose DC-DC applications. It complements other variants in the family that offer different fixed output voltages, such as 1.2 V, 1.5 V, 1.8 V, 2.5 V, 3.3 V, and 5.0 V. The series shares common architectural features including internal power switches and protection circuits, allowing for consistent design methodologies across various voltage rails.

Replacement Considerations

Direct replacements within the same series include S-8533A12AFT-TB-G (1.2 V), S-8533A15AFT-TB-G (1.5 V), S-8533A18AFT-TB-G (1.8 V), S-8533A33AFT-TB-G (3.3 V), and S-8533A50AFT-TB-G (5.0 V). These parts share identical pinouts and functional characteristics, differing only in the internal feedback resistor network setting the output voltage.