LT8350RV#PBF

The Analog Devices LT8350RV#PBF is a high-voltage, high-efficiency DC/DC converter featuring wide input voltage range and programmable output, optimized for applications requiring isolated or non-isolated power conversion. It integrates a current-mode controller with a synchronous rectification option, providing high conversion efficiency, fast transient response, and compact design flexibility. The device is suitable for industrial power supplies, automotive systems, LED drivers, and telecom equipment, delivering precise voltage regulation across a broad input range.

## General Features

The LT8350RV#PBF is available in a thermally enhanced 28-lead SSOP package with an exposed pad for improved heat dissipation. It supports wide input voltage operation from 4 V to 150 V, making it compatible with automotive, industrial, and high-voltage DC systems. The device includes an integrated 600 V N-channel MOSFET in its internal high-voltage controller, allowing for simple, compact designs without the need for external high-voltage switches. Programmable features such as adjustable output voltage, soft-start, and overcurrent protection make it versatile for custom power requirements.

## Electrical Specifications

* Input Voltage Range (VIN): 4 V to 150 V
* Output Voltage Range (VOUT): Adjustable from 5 V to 60 V
* Maximum Output Current: Up to 10 A, dependent on external components and thermal design
* Switching Frequency (fSW): 50 kHz to 1 MHz, programmable
* Peak Current Limit: 10 A typical, internally set
* Feedback Voltage (VFB): 1.00 V typical
* Quiescent Current: 1.5 mA typical
* Efficiency: Up to 96% depending on input/output conditions and external components
* Operating Junction Temperature: –40 °C to +125 °C
* Thermal Resistance Junction-to-Case (RθJC): 15 °C/W typical
* Package: 28-lead SSOP with exposed pad for improved thermal dissipation

## Performance and Efficiency

* High-voltage input capability supports direct connection to battery, industrial, or telecom rails
* Synchronous rectification reduces conduction losses and improves efficiency at high currents
* Fast transient response enables stable output voltage under dynamic load conditions
* Programmable soft-start minimizes inrush current and reduces stress on power components
* Wide switching frequency range allows optimization between efficiency and external component size
* Low quiescent current ensures minimal power loss during standby operation

## Protection and Reliability

* Overcurrent and overvoltage protection prevent damage to the device and downstream loads
* Thermal shutdown and foldback ensure safe operation under abnormal temperature conditions
* Undervoltage lockout guarantees stable operation only when sufficient input voltage is present
* Short-circuit protection protects the converter during output faults
* High-voltage rugged design suitable for automotive and industrial transients
* Exposed pad package enhances heat dissipation, improving long-term reliability

## Typical Applications

* High-voltage LED drivers for industrial or commercial lighting
* Isolated or non-isolated DC/DC converters in automotive, solar, and battery-powered systems
* Telecom and networking power supplies requiring precise voltage regulation
* Industrial process control equipment and instrumentation
* Energy storage and power distribution modules in high-voltage DC environments

## Key Advantages

* Wide input voltage range accommodates diverse industrial and automotive applications
* Integrated MOSFET simplifies design and reduces external component count
* High efficiency with synchronous rectification improves thermal performance and reduces PCB footprint
* Programmable output and frequency provide design flexibility for custom power solutions
* Robust protection features enhance system reliability and reduce design risk
* Exposed pad SSOP package improves heat dissipation, allowing higher output currents

## Design Considerations

* External components, including inductor, capacitors, and feedback resistors, must be selected to handle maximum current and voltage requirements
* Adequate thermal management is required to maintain junction temperature within safe operating limits under full load
* Input bypass capacitors reduce voltage ripple and improve transient response
* PCB layout should minimize parasitic inductance and resistance to maintain switching efficiency and reduce EMI
* Soft-start and current limit programming should be optimized to prevent inrush current issues during startup
* Consideration of loop compensation ensures stable regulation under varying input and output conditions

## Summary

The Analog Devices LT8350RV#PBF is a versatile, high-voltage, high-efficiency DC/DC converter suited for industrial, automotive, and telecom applications. Its wide input voltage range, programmable output, and integrated MOSFET facilitate compact and reliable designs, while synchronous rectification and advanced protection features improve efficiency and system robustness. With flexible switching frequency, adjustable output, and enhanced thermal management via an exposed pad SSOP package, the LT8350RV#PBF provides designers with a reliable solution for high-performance power conversion in demanding environments.