S-8520D25MC-BVKT2G

Overview

The S-8520D25MC-BVKT2G 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 2.5 V with an accuracy of ±1.5%. It operates within an input voltage range of 2.5 V to 10 V and supports a switching frequency of 180 kHz. The IC includes a built-in error amplifier and a soft-start circuit to prevent startup overshoot. It is housed in a compact SOT-23-5 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 error amplifier and soft-start circuit to prevent startup overshoot
• Fixed output voltage options with high accuracy
• Compact SOT-23-5 surface mount package

Applications

• Portable electronic devices requiring efficient step-down conversion
• Battery-powered equipment needing stable voltage regulation
• General-purpose DC-DC converter designs

Procurement Notes

Verify the specific suffix BVKT2G against the official datasheet to confirm the exact output voltage and package variant. Ensure compatibility with external components such as Pch MOSFETs or PNPs, coils, and capacitors required for the step-down topology. Confirm RoHS compliance and lead times directly with the manufacturer or authorized distributors.

Selection Notes

Select this component when a fixed 2.5 V output is required with PWM control for low ripple applications. Consider the 180 kHz switching frequency for balancing size and efficiency. Verify that the external power stage components match the controller's drive capabilities and that the operating temperature range meets system requirements.

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. These controllers are designed to function as complete step-down regulators when connected with external passive and active components.

Replacement Considerations

Check for other S-8520 variants with different output voltages or packages if the 2.5 V fixed output is not suitable. Cross-reference with S-8521 series parts if PFM mode at light loads is desired instead of pure PWM control.