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How the LM385 Voltage Regulator Diode Works and Where to Use It

Discover how the LM385 voltage regulator diode works and why it’s a reliable choice for low-power applications. This guide covers its features, uses, and what makes it a versatile component for various electronic projects.

Catalog

[IMAGE OF LM385]

Overview of LM385 Voltage Regulator Diode

The LM385 series includes micropower, two-terminal bandgap voltage regulator diodes designed for a current range of 10 μA to 20 mA. They are known for their low dynamic impedance and minimal noise, making them stable across temperature shifts and over time. On-chip trimming enhances their voltage accuracy, providing consistency in various circuit designs. With a wide operating range, these diodes are flexible, allowing use in circuits where power supply levels may vary, yet requiring steady regulation.

Their low current requirement makes the LM385 series ideal for portable instrumentation, regulators, and analog devices where battery life is a priority. Available in TO-226 plastic or surface-mount packages with voltage options of 1.235 V and 2.500 V, they meet diverse application needs.

LM385 Pin Configuration

[IMAGE OF LM385 Pin Configuration]

LM385 CAD Model

LM385 Symbol

[IMAGE OF LM385 Symbol]

LM385 Footprint

[IMAGE OF LM385 Footprint]

LM385 3D Model

[IMAGE OF LM385 3D Model]

Key Features of LM385

Wide Operating Current Range

The LM385 can operate across a broad current range, from 10 μA to 20 mA. This flexibility means you can use it in applications that vary widely in power requirements, especially those where conserving power is a priority. The ability to handle such a range makes the LM385 versatile for different electronic designs.

Multiple Voltage Tolerance Options

The LM385 is available in several tolerance grades, including 1.0%, 1.5%, 2.0%, and 3.0%. This variety allows you to select the level of accuracy that best suits your project, whether you need very tight voltage control or can work with slightly more flexibility. This customization makes it adaptable to applications where precision is a factor.

Stability in Temperature Variations

A low temperature coefficient means the LM385 remains stable across changes in temperature, reducing the likelihood of performance shifts in different environments. For projects where temperature changes are expected, this feature ensures that the LM385 delivers consistent results, making it reliable in various conditions.

Low Dynamic Impedance

With a dynamic impedance of just 1.0 Ω, the LM385 minimizes voltage fluctuation, even under varying load conditions. This feature helps provide a smooth, steady output, which is especially valuable in circuits where stable voltage is critical for proper function.

Surface-Mount Packaging Option

The LM385 series includes a surface-mount option, ideal for applications that need a compact, space-efficient design. Surface-mount components like the LM385 are often preferred in modern electronics due to their small footprint, making them suitable for high-density circuit boards.

RoHS Compliant and Lead-Free

The LM385 meets RoHS compliance standards and is lead-free, which aligns with modern environmental and safety requirements. This feature makes the LM385 a good choice for projects that prioritize eco-friendly components or need to meet specific regulatory standards.

LM385 Specifications

Technical specifications, features, characteristics, and components with comparable specifications of ON Semiconductor LM385Z-1.2G

[TABLE OF LM385 Specifications]

Parts with Similar Specifications to LM385

The parts on the right have specifications similar to the ON Semiconductor LM385Z-1.2G

[TABLE OF Parts with Similar Specs]

Equivalents of LM385

[TABLE OF LM385 Equivalent]

Applications for LM385

Portable Instrumentation

The LM385 is especially effective in portable instrumentation due to its low power consumption, helping to extend battery life in devices that need to be energy-efficient. Its ability to operate on minimal power makes it well-suited for tools and instruments that are used on the go, ensuring prolonged performance without frequent recharging or battery replacements.

Voltage Regulation

In circuits that require stable and precise voltage regulation, the LM385 serves as a reliable option. It can maintain a steady output voltage, which is essential for applications where voltage fluctuations could disrupt functionality. This makes the LM385 a valuable component in regulatory systems that demand consistent power delivery.

Analog Circuits

The LM385 performs well in analog circuits, where low noise and stable output are needed for accurate signal processing. Its consistent voltage reference aids in maintaining signal integrity, helping to achieve smooth circuit operation. This reliability makes it a preferred choice in analog applications, where even minor fluctuations in voltage can impact performance.

LM385 Package Information

[IMAGE OF TO−92(TO−226) Package]

About the Manufacturer of LM385

On Semiconductor, listed as ON on Nasdaq, is dedicated to reducing energy use. The company provides an extensive range of products in power, signal management, and custom solutions, all designed to be energy-efficient. It maintains a reliable supply chain with a strong network of manufacturing facilities, sales offices, and design centers in North America, Europe, and the Asia Pacific regions. This global reach allows them to offer reliable and responsive support to various markets, ensuring consistent access to high-quality products like the LM385.

Frequently Asked Questions [FAQ]

1. What is the difference in the temperature range between LM285 and LM385?

The LM285 is designed to operate within a temperature range of -40°C to +85°C, which makes it suitable for a wider range of environments. In comparison, the LM385 is rated for a range of 0°C to +70°C, fitting applications where extreme temperatures aren’t a concern.

2. What type of device is the LM385?

The LM385 series is a micropower, two-terminal bandgap regulator diode. It is designed to work with a current range from 10 µA to 20 mA, offering low dynamic impedance and minimal noise. This stability across varying currents makes it useful in applications where power supply levels may fluctuate but reliable voltage regulation is still needed. Its low operating current allows for extended battery life, which is ideal for portable instruments, regulators, and other low-power analog circuits.