S-8520F26MC-BNLT2G

Overview

The S-8520F26MC-BNLT2G 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 operates with an input voltage range of 2.5 V to 10 V and features a fixed output voltage of 2.6 V. Designed for surface mount installation in a compact SOT-23-5 package, it supports a maximum switching frequency of 375 kHz. The component functions within a temperature range of -40°C to +85°C and includes built-in protection features such as soft-start to prevent startup overshoot.

Feature Summary

• Employs PWM control circuitry capable of varying the duty ratio linearly from 0% up to 100% for stable regulation.
• Integrates an error amplifier and a reference voltage source to maintain precise output stability.
• Includes a soft-start circuit designed to prevent output voltage overshoot during initial power-up sequences.

Applications

• Portable electronic devices requiring efficient step-down voltage conversion
• Battery-powered equipment utilizing external Pch power MOS FETs or PNPs
• General-purpose DC-DC converter circuits in consumer electronics

Procurement Notes

Verify the specific suffix BNLT2G against official ABLIC documentation to confirm package type and tape-and-reel specifications. Ensure compatibility with external components such as coils, capacitors, diodes, and Pch power MOS FETs or PNP transistors required for operation. Confirm RoHS compliance status and check for any recent design changes or PCNs affecting marking or materials before finalizing procurement orders.

Selection Notes

Select this component when a dedicated switching controller is preferred over integrated regulators to allow customization of external power stages. It is suitable for designs requiring linear duty ratio adjustment via PWM. Consider the S-8521 series if automatic switching between PWM and PFM modes under light loads is necessary for enhanced efficiency. Verify that the external component selection supports the 375 kHz maximum switching frequency.

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 applications demanding low ripple and excellent transient characteristics. It serves as a core control element in power management systems where external power switches are utilized to handle higher currents or specific voltage requirements beyond the IC's internal capabilities.

Replacement Considerations

The S-8521 series offers similar functionality but adds PFM control capability for light-load efficiency. Direct pin-compatible replacements may exist within the same manufacturer family; verify electrical parameters and control modes carefully.