UCD3138RHAR

Overview

The UCD3138RHAR is a digital power controller from Texas Instruments housed in a 40-VQFN (6x6) package. It operates on a supply voltage of 3V to 3.6V with a typical supply current of 100 mA. The device supports an operating temperature range from -40°C to +125°C and features surface mount installation. It is classified as a specialized PMIC designed for high integration in power management applications.

Feature Summary

• Digital control of up to three independent feedback loops using dedicated hardware-based PID compensators
• Supports firmware updates without shutting down the power supply via dual memory image capability
• Includes high-resolution digital pulse width modulated outputs with adjustable phase shift and dead-bands
• Provides fast, automatic, and smooth mode switching between frequency modulation and PWM

Applications

• Datacenter power supplies
• Isolated DC/DC modules
• Power factor correction circuits
• Communication rectifiers

Procurement Notes

Verify the specific suffix RHAR against the official datasheet to confirm the tape and reel packaging configuration. Ensure the ordering quantity aligns with the manufacturer's standard shipping requirements. Confirm RoHS compliance status and moisture sensitivity level prior to assembly planning.

Selection Notes

Select this component when designing systems requiring multi-loop digital control within a compact footprint. Consider the 40-pin QFN package constraints for thermal management and PCB layout. Evaluate the need for SPI or additional I2C ports if higher memory variants are required for complex firmware logic.

Part Context

This part belongs to the UCD3138 family of highly integrated digital controllers. It serves as a single-chip solution for power conversion, offering superior integration compared to analog counterparts. The device utilizes a 32-bit ARM7TDMI-S core to execute digital control algorithms efficiently.

Replacement Considerations

Check for UCD3138RMHR as a potential alternative, noting its NRND status may impact long-term availability. Verify pin compatibility and software migration efforts before substituting with other members of the UCD3138 series.