LTC3803HS6-3#TRMPBF

DC DC Switching Controllers Overview

The LTC3803HS6-3#TRMPBF is a constant frequency current mode flyback DC/DC controller manufactured by Analog Devices Inc. It operates within an input voltage range of 9.2V to 75V and provides a single isolated output. The device supports a maximum switching frequency of 240kHz and delivers up to 1A output current. It features a typical quiescent current of 0.24mA and functions reliably across a temperature range of -55°C to 150°C. Packaged in a compact TSOT-23-6 surface-mount case, it includes internal soft-start and cycle-by-cycle current limiting for robust power management.

DC DC Switching Controllers Feature Summary

• Constant frequency current mode control architecture for stable regulation
• Integrated high-voltage startup circuit enabling operation from wide input ranges
• Built-in soft-start functionality limits inrush current during initialization
• Cycle-by-cycle current limiting protects against overload conditions

DC DC Switching Controllers Applications

• Isolated DC/DC converter designs for industrial equipment
• Power supplies for automotive electronics requiring extended temperature ranges
• Telecommunications infrastructure power modules
• Battery-powered systems with wide input voltage requirements

DC DC Switching Controllers Procurement Notes

Verify the specific suffix 'HS6' indicates the military-grade temperature range (-55°C to 150°C) compared to commercial variants. Confirm the '-3' suffix corresponds to the 3V reference or output configuration as per the official datasheet. Ensure the '#TRMPBF' designation matches the required tape and reel packaging format. Cross-reference the manufacturer part number directly with Analog Devices documentation to avoid confusion with similar LTS series components.

DC DC Switching Controllers Selection Notes

Select this component when designing flyback converters requiring high input voltages up to 75V and operation in extreme thermal environments. The TSOT-23-6 package is suitable for space-constrained applications. Consider the 240kHz switching frequency for balancing efficiency and component size. Verify that the external transformer design aligns with the controller's current limit thresholds and timing requirements for optimal performance.

DC DC Switching Controllers Part Context

This controller belongs to the LTC3803 family of flyback DC/DC controllers designed for high-voltage, low-power applications. It integrates essential power management functions into a small footprint, reducing external component count. The HS variant specifically targets rugged environments, offering enhanced thermal stability compared to standard commercial versions. It serves as a core control element in isolated power supply architectures.

DC DC Switching Controllers Replacement Considerations

Direct substitutes include other Analog Devices flyback controllers such as the LTC3803ES6-3#TRMPBF for commercial temperature grades. Verify pin compatibility and electrical specifications before substitution. Alternative manufacturers may offer functionally equivalent parts, but require careful validation of timing parameters and current limits.