S-8520F28MC-BNNT2G

Overview

The S-8520F28MC-BNNT2G is a CMOS step-down switching regulator controller from the S-8520 series, manufactured by ABLIC Inc. It utilizes Pulse Width Modulation (PWM) control to provide low-ripple power and high efficiency. The device features a fixed output voltage of 2.8V and operates with an input supply voltage range of 2.5V to 16V. It supports a maximum switching frequency of 375kHz and includes a soft-start circuit to prevent startup overshoot. Packaged in a compact SOT-23-5 format, it is designed for applications requiring stable DC-DC conversion.

Feature Summary

• Employs PWM control circuitry capable of linear duty ratio variation from 0% to 100% for precise regulation.
• Integrates a built-in error amplifier and soft-start circuit to ensure stable operation and prevent output overshoot during initialization.
• Delivers high-efficiency performance with excellent transient characteristics suitable for portable electronic devices.

Applications

• Portable electronic devices requiring efficient step-down power conversion
• Battery-powered equipment utilizing CMOS process technology
• General-purpose DC-DC converter circuits

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm RoHS compliance status and check for specific environmental declarations such as REACH restrictions. Ensure the package marking matches official datasheet specifications to avoid counterfeit components. Review the latest Product Change Notification (PCN) documents for any updates regarding material composition or manufacturing site changes prior to final procurement decisions.

Selection Notes

Select this component when a fixed 2.8V output is required without external feedback resistors. The S-8520 series is appropriate for designs prioritizing low ripple and high efficiency under constant load conditions. Consider the 375kHz switching frequency for balancing component size and electromagnetic interference. Ensure the application environment stays within the specified -40°C to 85°C operating temperature range for reliable performance.

Part Context

This part belongs to the S-8520/8521 series of CMOS step-down switching regulator controllers. The S-8520 series specifically focuses on PWM control for consistent performance, distinguishing it from the S-8521 series which offers PWM/PFM switching modes. These ICs are designed to function as complete step-down regulators when paired with minimal external passive components and power transistors.

Replacement Considerations

Consult the official ABLIC datasheet for verified substitute part numbers within the same series. Cross-reference pinouts and electrical parameters carefully before substitution. Generic equivalents may not match the specific fixed voltage or control topology requirements.