LM334Z

Current Regulation/Management Overview

The LM334Z is a three-terminal adjustable current source manufactured by STMicroelectronics, belonging to the LM134-LM234-LM334 series. It operates within an input voltage range of 1V to 40V and provides an output current up to 10mA. The device features ±3% initial accuracy and functions as a programmable current source determined by an external resistor. It is designed for through-hole installation in TO-92-3 packages and supports a standard operating temperature range of 0°C to 70°C.

Current Regulation/Management Feature Summary

• Three-terminal adjustable current source architecture
• Wide dynamic voltage range from 1V to 40V
• Current programming via single external resistor
• Temperature-proportional control pin voltage

Current Regulation/Management Applications

• Battery charging circuits
• LED driver applications
• Transducer power supplies
• Temperature measurement systems

Current Regulation/Management Procurement Notes

Verify component authenticity against STMicroelectronics official documentation due to potential availability variations. Confirm package integrity for TO-92-3 through-hole mounting. Check specific lot markings for manufacturing date codes. Ensure environmental conditions match the specified 0°C to 70°C operational range. Validate supply voltage limits do not exceed 40V during system integration.

Current Regulation/Management Selection Notes

Select this component when a precise, adjustable constant current source is required with minimal external circuitry. The TO-92-3 package suits low-power through-hole designs. Consider the ±3% accuracy specification for precision requirements. Evaluate thermal dissipation capabilities within the 70°C maximum junction temperature limit. Compare against LM234 or LM134 variants if extended temperature ranges are necessary.

Current Regulation/Management Part Context

Part of the LM134-LM234-LM334 family of three-terminal adjustable current sources. These devices share identical electrical characteristics but differ in temperature grade specifications. The LM334 variant specifically targets commercial temperature applications. This family utilizes a bandgap reference principle for stable current regulation across wide voltage and temperature spans.

Current Regulation/Management Replacement Considerations

LM234 offers extended industrial temperature range compatibility. LM134 provides military-grade temperature performance. Verify pinout compatibility for direct substitution. Ensure current regulation specifications meet application requirements.