S-8520F34MC-BNTT2G

Overview

The S-8520F34MC-BNTT2G is a CMOS step-down switching regulator controller from the S-8520 series by ABLIC Inc. It utilizes Pulse Width Modulation (PWM) control to achieve low ripple and high efficiency. The device features a fixed switching frequency of 180kHz and supports a duty ratio ranging from 0% to 100%. It operates with an input voltage range of 2.5V to 10V and includes an integrated error amplifier and soft-start circuit to prevent startup overshoot. The component is housed in a compact SC-74A, SOT-753 package.

Feature Summary

• PWM control circuit for linear duty ratio variation
• Integrated soft-start circuit prevents output overshoot
• Built-in error amplifier for stable regulation

Applications

• Step-down switching regulator designs
• Portable electronic devices requiring efficient power management
• General purpose DC-DC converter circuits

Procurement Notes

Verify the specific suffix codes against official datasheets to confirm pinout compatibility and electrical tolerances. Ensure the selected variant matches the required thermal performance and packaging specifications for the target application environment before finalizing procurement orders.

Selection Notes

Select this controller when a dedicated PWM topology is required for precise voltage regulation. It is suitable for designs needing a fixed 180kHz switching frequency and an operating temperature range of -40°C to 85°C. External components such as Pch MOS FETs or PNPs must be paired to complete the buck converter circuit.

Part Context

This part belongs to the S-8520/8521 series of CMOS step-down switching regulator controllers. The S-8520 series specifically employs PWM control, distinguishing it from the S-8521 series which supports both PWM and PFM modes. This family is designed for applications demanding high efficiency and excellent transient characteristics.

Replacement Considerations

S-8520E34MC-BJH-T2G