S-8520C35MC-BRUT2G

Overview

The S-8520C35MC-BRUT2G is a CMOS step-down switching regulator controller from the S-8520 series by ABLIC Inc. It utilizes Pulse Width Modulation (PWM) control to provide low-ripple power and high efficiency. The device features a fixed switching frequency of 180kHz and supports a maximum duty ratio of 100%. It operates with an input voltage range of 2.5V to 16V and includes an integrated error amplifier and soft-start circuit to prevent startup overshoot. The component is housed in a compact SOT-23-5 package.

Feature Summary

• Employs PWM control for linear duty ratio adjustment up to 100% to ensure stable output.
• Integrates a soft-start circuit to eliminate output voltage overshoot during initial power-up.
• Features an internal error amplifier for precise regulation and transient response management.

Applications

• Portable electronic devices requiring efficient step-down power conversion
• Battery-powered equipment utilizing PWM-controlled DC-DC regulation
• Embedded systems needing low-ripple power supplies

Procurement Notes

Verify the specific suffix BRUT2G against official ABLIC documentation to confirm pinout, marking codes, and tape-and-reel specifications. Ensure compatibility with the required 180kHz switching frequency and 16V maximum input rating for your design. Confirm RoHS compliance status through the manufacturer's current environmental declaration before finalizing procurement.

Selection Notes

Select this component when a fixed 180kHz PWM operation is preferred over variable frequency modes. It is suitable for designs requiring a 100% duty cycle capability for low dropout performance. Consider the S-8521 series if automatic transition between PWM and PFM modes under light loads is necessary for enhanced standby efficiency.

Part Context

This part belongs to the S-8520/8521 series of CMOS step-down switching regulator controllers manufactured by ABLIC Inc. The S-8520 series specifically focuses on PWM control architectures, distinguishing it from the hybrid PWM/PFM S-8521 series. These ICs are designed to function as complete regulators when paired with external power MOSFETs or transistors, coils, and capacitors.

Replacement Considerations

The S-8520B18MC-ARDT2U serves as a direct functional substitute within the same series, sharing identical PWM control topology and 180kHz switching frequency. Verify that the output voltage setting and package markings align with your board requirements before substitution.