LM5033MMX/NOPB

DC DC Switching Controllers Overview

The LM5033MMX/NOPB is a high-voltage push-pull voltage mode PWM controller from Texas Instruments, designed for full-bridge, half-bridge, and push-pull topologies. It features an internal 100-V startup regulator operating within a 15 V to 90 V input range. The device supports switching frequencies of 200 kHz and 600 kHz with a maximum duty cycle of 50%. It provides two AC gate driver outputs capable of sourcing 1.5 A peak current. Key specifications include a 1 MHz oscillator, remote shutdown capability, and soft-start functionality. The component operates across a temperature range of -40°C to +125°C and is housed in a 10-VSSOP package.

DC DC Switching Controllers Feature Summary

• Integrates an internal high-voltage startup regulator enabling operation from 15 V to 90 V without external bias supplies.
• Provides dual AC gate driver outputs with specified dead time control for push-pull, half-bridge, and full-bridge applications.
• Supports clock synchronization and includes precision reference output for accurate feedback loop implementation.

DC DC Switching Controllers Applications

• Closed-loop voltage mode converters requiring highly regulated output voltages
• Open-loop DC transformers such as intermediate bus converters (IBC)
• High-efficiency power supply designs exceeding 95% efficiency

DC DC Switching Controllers Procurement Notes

Verify the specific suffix against official Texas Instruments documentation to confirm pinout compatibility and thermal performance characteristics. Ensure that the 10-VSSOP package dimensions align with the target PCB footprint requirements. Confirm RoHS compliance status through the manufacturer's latest environmental declarations before finalizing procurement orders.

DC DC Switching Controllers Selection Notes

Select this controller for applications requiring wide input voltage ranges up to 100 V with integrated startup regulation. Consider the 1.5 A peak drive current for direct gate driving of external MOSFETs. Evaluate the 1 MHz oscillator speed against EMI constraints. Verify that the 50% maximum duty cycle suits the transformer turns ratio and application timing requirements.

DC DC Switching Controllers Part Context

The LM5033 belongs to the LM5033 series of high-voltage PWM controllers manufactured by Texas Instruments. This series focuses on multi-topology support for isolated power conversion architectures. The MMX/NOPB designation indicates a specific tape-and-reel packaging variant within the broader product family, optimized for automated surface-mount assembly processes.

DC DC Switching Controllers Replacement Considerations

LM5030SD/NOPB