LT3509EMSE#PBF - Dual Channel, Low EMI, 36V Step-Down Switching Regulator

The LT3509EMSE#PBF is a high-performance, dual-channel step-down switching regulator from Linear Technology, designed to deliver efficient power conversion with minimal electromagnetic interference (EMI). This advanced power management IC is capable of operating with an input voltage range of 3.6V to 36V, making it an ideal solution for automotive, industrial, and distributed power systems that require a wide input range and a stable output voltage.

Each channel of the LT3509EMSE#PBF is capable of delivering up to 1.25A of continuous output current with voltage outputs down to 0.8V, allowing for flexible power supply designs. The device features a unique Burst Mode® operation that maintains high efficiency at low output currents while keeping the output ripple to a minimum, which is crucial for sensitive applications where power efficiency and low noise are paramount.

The LT3509EMSE#PBF integrates a switcher with a 1.85MHz switching frequency, which allows designers to use smaller, low-cost inductors and capacitors, resulting in a compact, space-saving power supply design. Additionally, the device's high switching frequency enables a fast transient response, beneficial for applications requiring quick power adjustments to meet changing load conditions.

This regulator also includes a wide array of protective features to ensure the stability and longevity of the end application. These features include thermal shutdown, overvoltage protection, and current limiting. The LT3509EMSE#PBF also offers independent soft-start capability for each channel, which reduces inrush current during startup and provides a controlled voltage ramp-up, preventing stress on the power supply components.

Available in a thermally efficient 16-lead MSOP package, the LT3509EMSE#PBF is designed to withstand harsh environments and is specified for operation from –40°C to 125°C, making it reliable for automotive and industrial applications where temperature extremes are common.

With its dual-channel design, low EMI signature, high efficiency, and robust protection features, the LT3509EMSE#PBF from Linear Technology stands out as a versatile and reliable choice for engineers looking to develop advanced power systems with stringent space, efficiency, and EMI requirements.