SCT2450STER

Voltage Regulators - DC DC Switching Regulators Overview

The SCT2450STER is a high-power density, fully integrated synchronous buck DC-DC converter from the SCT brand. It delivers up to 5A of continuous output current with an input voltage range spanning 3.8V to 36V, supporting transient overvoltage up to 38V. The device features a fixed 0.8V ±1% feedback reference voltage and integrates high-side (45mΩ) and low-side (20mΩ) power MOSFETs. It supports a programmable switching frequency from 100kHz to 1.1MHz via external resistance and allows for external clock synchronization within this range. Key electrical characteristics include a typical 25μA quiescent current in sleep mode, a minimum high-side MOSFET turn-on time of 100ns, and an internal soft-start duration of 4ms.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates peak current mode control with smooth transition between PWM and PSM modes for optimized efficiency across load ranges.
• Features spread spectrum frequency modulation (FSS) to reduce conducted electromagnetic interference (EMI).
• Supports low dropout LDO operation mode and negative voltage step-down conversion designs.
• Includes comprehensive protection mechanisms such as cycle-by-cycle current limiting, hiccup overcurrent protection, thermal shutdown, and output overvoltage protection.

Voltage Regulators - DC DC Switching Regulators Applications

• Electric tools and drone power systems
• USB PD fast charging and general USB charging stations
• Industrial and medical power supply units
• Automotive charger applications

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix 'STER' against official manufacturer documentation to confirm package type and temperature grade. Ensure compatibility with the required switching frequency resistor values. Confirm that the ESOP-8 pinout matches the target PCB footprint design. Validate input voltage tolerance against potential system transients exceeding 36V.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a wide input voltage range up to 36V is required alongside high continuous current capability. Consider the adjustable frequency feature if minimizing external inductor size or synchronizing with other system clocks is necessary. Evaluate the low quiescent current specification for battery-operated applications requiring extended standby life.

Voltage Regulators - DC DC Switching Regulators Part Context

The SCT2450STER belongs to the SCT2450 family of synchronous buck converters. This series includes variants such as the SCT2450QSTER, which is designated for automotive-grade applications compared to the industrial-grade standard version. The family shares core architectural features including integrated power stages and advanced EMI reduction techniques.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Publicly documented substitutes include the TPS54540. Verify pin-to-pin compatibility and electrical parameter alignment before implementation.

Voltage Regulators - DC DC Switching Regulators FAQ

Does the SCT2450STER support negative voltage step-down conversion?

Yes, the device supports negative voltage step-down conversion designs.

What is the maximum absolute maximum input voltage rating?

The absolute maximum input voltage rating is 38V, allowing for transient overvoltage tolerance beyond the nominal 36V operating range.