LD39030SJ15R

Product Overview

• Category: Integrated Circuit (IC)
• Use: Voltage Regulator
• Characteristics: Low Dropout, High Current, Adjustable Output Voltage
• Package: TO-220, 3-Pin
• Essence: LD39030SJ15R is a voltage regulator IC designed to provide a stable output voltage with low dropout and high current capability.
• Packaging/Quantity: Available in reels or tubes, quantity varies based on supplier.

Specifications

• Input Voltage Range: 2.5V - 20V
• Output Voltage Range: 1.25V - 18V
• Output Current: Up to 3A
• Dropout Voltage: 0.4V @ 3A
• Quiescent Current: 75µA
• Operating Temperature Range: -40°C to +125°C
• Protection Features: Overcurrent Protection, Thermal Shutdown, Reverse Polarity Protection

Pin Configuration

The LD39030SJ15R has the following pin configuration:

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| | --| VIN GND |-- Pin 1: Input Voltage (VIN) / Ground (GND) --| VOUT NC |-- Pin 2: Output Voltage (VOUT) / No Connection (NC) --| ADJ NC |-- Pin 3: Adjust (ADJ) / No Connection (NC) |___________| ```

Functional Features

• Low Dropout: The LD39030SJ15R exhibits a low dropout voltage, ensuring efficient regulation even when the input voltage is close to the desired output voltage.
• High Current Capability: With an output current of up to 3A, this voltage regulator can handle demanding applications that require a stable power supply.
• Adjustable Output Voltage: The output voltage can be adjusted within the specified range using an external resistor divider network connected to the ADJ pin.
• Protection Features: The IC incorporates overcurrent protection, thermal shutdown, and reverse polarity protection to safeguard against potential damage.

Advantages and Disadvantages

Advantages: - High current capability - Adjustable output voltage - Low dropout voltage - Protection features ensure reliability

Disadvantages: - Limited output voltage range (1.25V - 18V) - Requires external components for precise voltage adjustment

Working Principles

The LD39030SJ15R is a linear voltage regulator that utilizes a pass transistor to regulate the output voltage. It operates by comparing the reference voltage with a fraction of the output voltage through a feedback network. Any deviation from the desired output voltage causes the control circuitry to adjust the pass transistor's resistance, maintaining a stable output voltage.

Application Field Plans

The LD39030SJ15R finds applications in various fields, including but not limited to: - Power supplies for microcontrollers and digital circuits - Battery-powered devices - Automotive electronics - Industrial control systems - Communication equipment

Alternative Models

• LD39030SJ12R: Similar specifications, but with a fixed output voltage of 1.2V
• LD39030SJ33R: Similar specifications, but with a fixed output voltage of 3.3V
• LD39030SJ50R: Similar specifications, but with a fixed output voltage of 5V

These alternative models provide options for specific voltage requirements while maintaining similar characteristics and performance.

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