LM385BM-1.2/NOPB

Product Overview

Category

The LM385BM-1.2/NOPB belongs to the category of voltage references.

Use

It is commonly used as a precision shunt regulator for various applications.

Characteristics

• Voltage Reference: 1.2V
• Package Type: SOT-23
• Essence: Precision shunt regulator
• Packaging/Quantity: Tape and Reel, 3000 units per reel

Specifications

The LM385BM-1.2/NOPB has the following specifications:

• Output Voltage: 1.2V ± 0.5%
• Temperature Coefficient: 100 ppm/°C (maximum)
• Line Regulation: 0.01% (maximum)
• Load Regulation: 0.05% (maximum)
• Quiescent Current: 120 µA (typical)

Pin Configuration

The LM385BM-1.2/NOPB has three pins arranged as follows:

```

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| | --| V+ |-- --| |-- |____| ```

Pin 1: V+ (Input voltage) Pin 2: GND (Ground) Pin 3: VOUT (Output voltage)

Functional Features

The LM385BM-1.2/NOPB offers the following functional features:

• High Precision: The voltage reference provides a stable output voltage of 1.2V with a low temperature coefficient.
• Low Quiescent Current: It consumes only 120 µA of current, making it suitable for low-power applications.
• Wide Operating Temperature Range: The LM385BM-1.2/NOPB can operate in temperatures ranging from -40°C to +85°C.
• Low Dropout Voltage: It has a low dropout voltage, ensuring efficient operation even with small input-output differentials.

Advantages and Disadvantages

Advantages

• High precision and stability
• Low quiescent current consumption
• Wide operating temperature range
• Small package size (SOT-23)

Disadvantages

• Limited output voltage options (1.2V in this case)
• Not suitable for high-current applications

Working Principles

The LM385BM-1.2/NOPB operates as a shunt regulator, maintaining a constant output voltage of 1.2V regardless of changes in the input voltage or load conditions. It achieves this by utilizing a precision bandgap reference circuit that compensates for temperature variations.

Detailed Application Field Plans

The LM385BM-1.2/NOPB finds applications in various fields, including:

1. Battery-Powered Devices: It can be used to provide a stable voltage reference for battery-powered devices such as portable electronics, sensors, and meters.
2. Industrial Control Systems: The LM385BM-1.2/NOPB ensures precise voltage references in industrial control systems, enabling accurate measurements and control.
3. Automotive Electronics: It is suitable for automotive applications where a stable voltage reference is required for sensors, actuators, and control modules.
4. Medical Instruments: The LM385BM-1.2/NOPB can be utilized in medical instruments that demand high precision and stability in voltage references.

Detailed and Complete Alternative Models

Some alternative models to the LM385BM-1.2/NOPB include:

1. LM4040AIM3-1.2/NOPB: A 1.2V precision shunt regulator with similar characteristics and package type.
2. LT1004CZ-1.2#PBF: Another 1.2V voltage reference offering high precision and low temperature coefficient.
3. REF102CU: A precision voltage reference with a 1.2V output and excellent long-term stability.

These alternative models provide similar functionality and can be considered as substitutes for the LM385BM-1.2/NOPB in various applications.

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