S-8520E50MC-BKJT2G

Overview

The S-8520E50MC-BKJT2G 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 achieve high efficiency and low ripple output. The device operates with an input voltage range of 2.5V to 16V and supports a maximum switching frequency of 375kHz. It features a soft-start circuit to prevent startup overshoot and offers a duty ratio that varies linearly from 0% up to 100%. The component is housed in a compact SOT-23-5 package and is rated for operation within a temperature range of -40°C to +85°C.

Feature Summary

• Employs PWM control architecture for stable regulation
• Integrates a soft-start function to manage startup transients
• Supports linear duty ratio adjustment from 0% to 100%

Applications

• Battery-powered portable electronic devices
• General-purpose DC-DC power supply circuits
• Embedded systems requiring efficient step-down conversion

Procurement Notes

Verify the specific suffix BKJT2G against official datasheets to confirm pinout and marking codes. Ensure compatibility with external P-channel MOSFETs or PNPs as this is a controller IC. Confirm RoHS compliance status for your region before finalizing orders.

Selection Notes

Select this model when fixed-frequency PWM control is preferred over PFM modes. It is suitable for designs requiring precise duty cycle linearity. Consider the 375kHz switching frequency for balancing component size and efficiency. Verify that the external components can handle the required current and voltage levels.

Part Context

This part belongs to the S-8520 series of switching regulator controllers. Unlike the S-8521 series which supports both PWM and PFM modes, the S-8520 series is dedicated to PWM control. This distinction ensures consistent switching behavior across varying load conditions without automatic mode transitions.

Replacement Considerations

Direct replacements include other S-8520 series variants such as S-8520B18MC-ARDT2U or S-8520E22MC-BJH-T2G, provided the output voltage setting and switching frequency requirements align with the new design parameters.