SC2545MLTRT

Overview

The SC2545MLTRT is a high-performance dual synchronous buck controller from Semtech Corporation, designed for wide input voltage applications ranging from 4.5V to 28V. It features independent dual outputs with adjustable voltage down to 0.75V and supports peel-off tracking during startup. The device utilizes a synchronous buck topology with voltage mode control and operates at a programmable switching frequency between 100kHz and 300kHz. It includes an internal 10V regulator for gate drivers and offers full protection including UVLO, OVP, and programmable overcurrent protection.

Feature Summary

• Independent dual-output capability with peel-off start-up tracking
• Synchronous buck PWM topology with voltage mode control
• Out-of-phase operation to reduce input capacitor requirements
• Integrated 10V internal regulator for efficient gate driving

Applications

• LCD TV and PDP TV systems
• Network and telecom infrastructure equipment
• Systems requiring wide input voltage ranges (4.5V-28V)

Procurement Notes

Verify the specific package variant, as the SC2545 is available in both 24-lead TSSOP and MLPQ packages. Confirm RoHS compliance status and ensure the ordering code matches the required tape and reel quantity. Cross-reference the suffix with official Semtech documentation to confirm pinout and electrical characteristics match the design requirements.

Selection Notes

Select this component when designing power supplies for systems with input voltages up to 28V requiring two independent regulated rails. The out-of-phase operation makes it suitable for space-constrained designs needing reduced input capacitance. Ensure the application benefits from voltage mode control flexibility and does not require current-mode sensing resistors.

Part Context

The SC2545 belongs to Semtech's series of high-efficiency power management controllers. It complements other single-channel or fixed-frequency regulators by offering dual independent outputs with synchronized phase shifting. This family targets consumer electronics and telecommunications where board space and efficiency are critical constraints.

Replacement Considerations

The SC2542 is a similar high-performance dual synchronous buck controller from Semtech. Verify compatibility regarding input voltage range, output configuration, and package dimensions before substitution. Check if the alternative supports the same peel-off tracking and frequency programming features.