LTC1538CG-AUX#TRPBF

DC DC Switching Controllers Overview

The LTC1538CG-AUX#TRPBF is a dual synchronous switching regulator controller designed for high-efficiency DC/DC conversion. It operates at a constant frequency of 200kHz and supports input voltages from 5.2V to 28V. The device drives external N-channel power MOSFETs in a phase-lockable fixed-frequency architecture. Typical configurations include triple-output setups providing 5V/3A, 3.3V/3A, and a low-noise 12V/200mA linear regulator output powered by the 5V secondary winding. Efficiency reaches up to 98% with buck topology.

DC DC Switching Controllers Feature Summary

• Dual synchronous step-down switching regulator controller architecture
• Phase-lockable fixed frequency operation at 200kHz
• Integrated low-noise linear regulator capability for auxiliary outputs
• Drives external N-channel power MOSFETs for high efficiency

DC DC Switching Controllers Applications

• Triple-output DC/DC converter systems requiring 5V, 3.3V, and 12V rails
• High-efficiency standby power supplies with low quiescent current requirements
• Multi-rail power distribution units utilizing synchronized buck regulation

DC DC Switching Controllers Procurement Notes

Verify the complete part number including the suffix #TRPBF to ensure correct tape-and-reel packaging configuration. Confirm that the CG temperature grade matches your operational environment specifications. Cross-reference the datasheet revision date to ensure compatibility with your design's electrical constraints and pinout requirements before finalizing procurement orders.

DC DC Switching Controllers Selection Notes

Select this component when designing multi-output power systems requiring synchronized buck regulation with an integrated low-noise LDO option. It is suitable for applications needing phase-lockable frequencies to minimize EMI through synchronization. Ensure the external MOSFET selection aligns with the controller's drive capabilities and the desired 200kHz switching frequency for optimal efficiency and thermal performance.

DC DC Switching Controllers Part Context

This component belongs to the LTC1538 family of dual synchronous buck controllers. It is distinct from single-output variants and higher-frequency models like the LTC1538-1. The AUX suffix indicates specific internal circuitry adaptations for auxiliary configurations, such as powering low-noise linear regulators from secondary windings, differentiating it from standard dual-buck implementations.

DC DC Switching Controllers Replacement Considerations

Direct substitutes are not explicitly confirmed in public documentation. Evaluate other Analog Devices dual synchronous controllers based on switching frequency, input voltage range, and package compatibility (SSOP-16). Verify that alternative parts support the required phase-lockable architecture and external MOSFET drive requirements.