LM34930TL/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM34930TL/NOPB is a synchronous step-down DC-DC converter manufactured by Texas Instruments, formerly National Semiconductor. It integrates a high-side and low-side N-channel MOSFETs to deliver up to 1A of output current. The device operates from an input voltage range of 2.7V to 36V and features an adjustable output voltage. It utilizes a fixed 1.5MHz switching frequency to allow for the use of small external components. The controller includes comprehensive protection features such as cycle-by-cycle current limit, thermal shutdown, and soft-start functionality.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated synchronous rectification with internal high-side and low-side power switches
• Fixed 1.5MHz switching frequency enabling compact passive component selection
• Adjustable output voltage via external resistor divider network
• Built-in protection mechanisms including thermal shutdown and cycle-by-cycle current limiting

Voltage Regulators - DC DC Switching Regulators Applications

• Point-of-load regulation for embedded systems
• Battery-powered portable devices requiring efficient step-down conversion
• Industrial control systems with wide input voltage ranges
• Communication equipment power supplies

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the manufacturer designation carefully, as Texas Instruments acquired National Semiconductor. Ensure the suffix /NOPB is present to confirm lead-free compliance and RoHS adherence. Confirm the package marking matches the DSBGA-12 form factor. Cross-reference the full part number against official TI distribution channels to avoid counterfeit components or obsolete stock variations.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a compact solution is required for converting higher voltages down to lower logic levels. The fixed 1.5MHz frequency is suitable for applications prioritizing board space over maximum efficiency at very light loads. Ensure the input voltage does not exceed the 36V absolute maximum rating. Consider the thermal performance of the DSBGA package if operating near the 1A current limit in enclosed environments.

Voltage Regulators - DC DC Switching Regulators Part Context

This device belongs to the LM3493x family of synchronous buck converters. It shares architectural similarities with other members like the LM34931 but may differ in specific pin configurations or integrated features. The transition from National Semiconductor branding to Texas Instruments reflects corporate acquisition history rather than a change in the underlying silicon design or functionality.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Direct replacements include the LM34931TLX/NOPB and LM34930QML/NOPB. Verify that substitute parts maintain compatibility with the existing PCB footprint and control loop compensation. Check for any differences in thermal resistance or switching frequency that might necessitate changes to the surrounding passive components.