LM334D

Current Regulation/Management Overview

The LM334D is a three-terminal adjustable current source manufactured by STMicroelectronics, belonging to the LM134-LM234-LM334 series. It operates within a supply voltage range of 1 V to 40 V and supports an operating current range from 1 µA to 10 mA. The device features an initial accuracy of ±3% and a current regulation of 0.02%/V. It is housed in an SOIC-8 surface-mount package with dimensions of 5 mm length, 4 mm width, and 1.5 mm height. The component functions over a temperature range of 0°C to +70°C.

Current Regulation/Management Feature Summary

• Three-terminal adjustable current source design
• Wide dynamic voltage range operation
• High precision current regulation
• Temperature-proportional control pin voltage

Current Regulation/Management Applications

• Current reference circuits
• Battery chargers
• LED drivers
• Transducer power supplies

Current Regulation/Management Procurement Notes

Verify the specific suffix against official datasheets to confirm package type and temperature grade. Ensure compatibility with required operating conditions before integration. Confirm RoHS compliance status for regulatory adherence. Check for alternative packaging options such as tape and reel if high-volume production is planned. Validate pinout configurations to prevent installation errors during assembly.

Current Regulation/Management Selection Notes

Select this component when a stable, programmable current source is required across a wide voltage range. The SOIC-8 package suits space-constrained surface-mount designs. Consider the ±3% accuracy for applications demanding precise current control. Evaluate thermal performance within the specified operating temperature limits. Compare against LM234 or LM134 variants if extended temperature ranges are necessary.

Current Regulation/Management Part Context

The LM334D is part of the industry-standard LM134/LM234/LM334 family of three-terminal adjustable current sources. These devices are characterized by excellent current regulation and a wide dynamic voltage range. The 'D' suffix typically denotes the SOIC-8 surface-mount package variant. This family is widely used in industrial and consumer electronics for current limiting and biasing applications.

Current Regulation/Management Replacement Considerations

LM234DT (Industrial Temperature Grade)

Current Regulation/Management FAQ

How is the output current determined?

The output current is set by a single external resistor connected between the adjust terminal and the cathode, without requiring additional components.

What is the voltage characteristic of the control pin?

The voltage on the control pin is 64 mV at +25°C and is directly proportional to absolute temperature (Kelvin).