S-8520B35MC-ARUT2G

Overview

The S-8520B35MC-ARUT2G is a CMOS step-down switching regulator controller from the S-8520 series by ABLIC Inc. It utilizes PWM control to provide low-ripple power and high efficiency. The device operates with an input voltage range of 2.5V to 10V and supports a fixed output voltage setting. It features a built-in error amplifier, soft-start circuit, and oscillation circuit. The component is housed in a SC-74A (SOT-753) surface-mount package and is rated for operation between -40°C and +85°C.

Feature Summary

• PWM control circuit capable of varying duty ratio linearly from 0% up to 100%
• Built-in soft-start circuit prevents overshoot at startup
• Integrated reference voltage source and error amplifier

Applications

• Step-down switching regulator designs requiring external Pch MOS FETs
• Portable electronic devices utilizing compact surface-mount packages
• General-purpose DC-DC converter circuits

Procurement Notes

Verify the specific suffix ARUT2G against official ABLIC documentation to confirm exact marking codes and tape-and-reel specifications. Ensure compatibility with required output voltage settings and external component selections as defined in the S-8520 datasheet. Confirm RoHS compliance status and packaging details prior to ordering.

Selection Notes

Select this controller when designing non-synchronous buck converters requiring precise PWM duty cycle control. It is suitable for applications needing linear duty ratio variation from 0% to 100%. Consider external Pch power MOS FET selection based on current requirements and thermal constraints. Verify that the operating temperature range meets system environmental demands.

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 for stable operation, distinguishing it from the S-8521 series which supports both PWM and PFM modes. These ICs are designed to function with minimal external components while maintaining high efficiency.

Replacement Considerations

The S-8520E22MC-BJH-T2G is a confirmed substitute within the same S-8520 series family. Both parts share identical PWM control topology and functional characteristics. Verify pinout compatibility and specific output voltage settings before implementation.