Linear Technology LTC3857IGN-1 High Performance Dual Output Synchronous Step-Down DC/DC Controller

The LTC3857IGN-1 is a high-performance, dual synchronous step-down DC/DC controller from Linear Technology that delivers precision power regulation for demanding applications. It is designed to drive N-channel MOSFETs at a constant frequency with its dual, current mode architecture. This component is highly suitable for systems that require reliable and efficient power delivery with a compact footprint.

Featuring a wide input voltage range from 4.5V to 38V, the LTC3857IGN-1 can accommodate a variety of supply voltages, making it versatile for different applications, including telecommunications, industrial systems, and automotive electronics. Its output voltage can be set from 0.8V to 24V, which ensures compatibility with modern low-voltage, high-performance ICs.

The LTC3857IGN-1 offers a robust set of features to enhance system performance and reliability. Its phase-locked loop (PLL) allows for a selectable frequency from 250kHz to 770kHz or it can be synchronized to an external clock within the same range. This flexibility helps to manage and reduce electromagnetic interference (EMI) in noise-sensitive environments.

With integrated features such as differential output voltage sensing and an internal LDO for gate drive bias, the LTC3857IGN-1 provides accurate output voltage regulation and efficient gate driving capabilities. The device also includes a powerful 1.1Ω on-chip top gate driver and a 2.4Ω on-chip bottom gate driver to ensure robust MOSFET switching.

Protection features of the LTC3857IGN-1 are comprehensive and include overvoltage protection, undervoltage lockout, overcurrent protection, and thermal shutdown. These features safeguard the system from various fault conditions, ensuring long-term reliability and stability.

Available in a 28-lead SSOP package, the LTC3857IGN-1 is designed for space-constrained applications. Its compact design does not compromise on performance, delivering high efficiency and precise regulation in a small form factor.

Overall, the LTC3857IGN-1 from Linear Technology is a sophisticated solution for designers looking to implement a high-efficiency, dual output power supply with advanced features and protections. Its adaptability, efficiency, and compact size make it an excellent choice for a wide range of power management applications.