UCC3803DG4

DC DC Switching Controllers Overview

The UCC3803DG4 is a low-power BiCMOS current-mode PWM controller from Texas Instruments, designed for versatile power supply topologies including Boost, Buck, Flyback, and Forward configurations. It features a single output capable of sourcing 1 A drive current with a maximum duty cycle of 100%. The device operates at switching frequencies up to 1 MHz and supports an input supply voltage range of 3.6 V to 12 V. It is housed in an SOIC-8 surface-mount package and functions within a commercial temperature range of 0°C to +70°C.

DC DC Switching Controllers Feature Summary

• Supports multiple converter topologies including Boost, Buck, Flyback, and Forward
• Provides high-drive capability with 1 A output current capacity
• Enables flexible frequency selection up to 1 MHz for compact designs
• Allows full load regulation with 100% maximum duty cycle

DC DC Switching Controllers Applications

• Battery-powered portable equipment power stages
• DC-DC step-up (Boost) converter circuits
• DC-DC step-down (Buck) regulator designs
• Isolated flyback power supplies
• Forward converter implementations

DC DC Switching Controllers Procurement Notes

Verify the specific suffix 'G4' indicates compliance with RoHS standards and manufacturing specifications as defined by Texas Instruments. Confirm that the SOIC-8 package variant matches your PCB footprint requirements. Ensure the operating temperature range of 0°C to +70°C aligns with your system's environmental conditions before finalizing procurement.

DC DC Switching Controllers Selection Notes

Select this component when a low-power, high-efficiency solution is required for non-isolated or isolated topologies. The 1 A drive strength suits moderate power levels without external gate drivers. Consider the 100% duty cycle feature for applications requiring continuous conduction mode or specific startup behaviors. Evaluate the 3.6 V minimum supply voltage against your available rail.

DC DC Switching Controllers Part Context

This part belongs to the UCC3803 series of low-power BiCMOS controllers. It serves as a core control element in various DC-DC conversion architectures. The DG4 designation specifies the SOIC-8 surface-mount package and lead-free construction. It complements other Texas Instruments power management ICs by providing robust current-mode control in a compact form factor.

DC DC Switching Controllers Replacement Considerations

The UCC3803DTRG4 is a tape-and-reel version of the same functional device. The UCC3803N is a through-hole PDIP-8 equivalent. Verify pinout compatibility and thermal performance when substituting between package types.