LM334H/NOPB

Current Regulation/Management Overview

The LM334H/NOPB is a three-terminal adjustable current source manufactured by Texas Instruments, belonging to the LM134/234/334 family. It operates within an input voltage range of 800 mV to 40 V and supports a maximum output current of 10 mA. The device features an accuracy of 3% and functions as a true floating current source without requiring separate power connections. It is housed in a TO-3 package with through-hole mounting style. The component is rated for an operating temperature range from -55 °C to +125 °C.

Current Regulation/Management Feature Summary

• Three-terminal adjustable current source design
• Wide dynamic voltage range operation
• High accuracy current regulation
• Floating configuration capability

Current Regulation/Management Applications

• Bias networks
• Surge protection circuits
• Low-power references
• Temperature sensing applications

Current Regulation/Management Procurement Notes

Verify the specific suffix H indicates the military-grade temperature range (-55 °C to +125 °C) compared to commercial variants. Confirm the TO-3 package type matches the target PCB footprint requirements. Ensure the 3% accuracy specification meets the circuit tolerance needs. Check RoHS compliance status for environmental regulations. Validate the manufacturer part number against official Texas Instruments documentation before ordering.

Current Regulation/Management Selection Notes

Select this component when high-temperature stability is required due to its extended operating range. The TO-3 package offers robust mechanical strength for industrial environments. Consider the 10 mA maximum current limit for load requirements. The floating nature allows flexible placement in high-side or low-side configurations. Compare against LM334Z for lower temperature ranges if cost is a primary factor.

Current Regulation/Management Part Context

This part belongs to the LM134/234/334 series of precision current sources. The 'H' suffix typically denotes the military temperature grade variant. It shares functional similarities with LM334Z but offers superior thermal performance. The series is known for wide dynamic range and simple external resistor programming.

Current Regulation/Management Replacement Considerations

LM334H is the direct predecessor to LM334H/NOPB. LM334Z/NOPB serves as a commercial-grade alternative with a limited temperature range.