TL2845DG4-8

Product Overview

Category: Integrated Circuit (IC)

Use: Voltage Regulator

Characteristics: - High efficiency - Low dropout voltage - Adjustable output voltage - Overcurrent protection - Thermal shutdown protection

Package: SOIC-8

Essence: The TL2845DG4-8 is a voltage regulator IC that provides a stable output voltage for various electronic devices.

Packaging/Quantity: The TL2845DG4-8 is typically sold in reels of 2500 units.

Specifications

• Input Voltage Range: 7V to 40V
• Output Voltage Range: 1.23V to 37V
• Output Current: Up to 1A
• Dropout Voltage: 0.6V (typical)
• Quiescent Current: 10mA (typical)
• Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

The TL2845DG4-8 has the following pin configuration:

1. Feedback (FB) - Connects to an external resistor divider network to set the desired output voltage.
2. Ground (GND) - Common ground reference for the IC.
3. Error Amplifier Output (EAOUT) - Provides error amplifier output for feedback control.
4. Compensation (COMP) - Connects to an external capacitor for stability compensation.
5. Soft Start (SS) - Connects to an external capacitor to control the soft start time.
6. Shutdown (SD) - Active low input to enable/disable the regulator.
7. Power Input (VIN) - Input voltage supply for the regulator.
8. Power Output (VOUT) - Output voltage from the regulator.

Functional Features

• High Efficiency: The TL2845DG4-8 utilizes a high-efficiency architecture, minimizing power dissipation and maximizing energy conversion.
• Low Dropout Voltage: The regulator maintains a low dropout voltage, ensuring stable output even when the input voltage is close to the desired output voltage.
• Adjustable Output Voltage: The TL2845DG4-8 allows for adjustable output voltage through an external resistor divider network.
• Overcurrent Protection: The IC incorporates overcurrent protection, safeguarding the connected circuitry from excessive current flow.
• Thermal Shutdown Protection: In case of excessive temperature, the thermal shutdown feature protects the IC from damage.

Advantages and Disadvantages

Advantages: - High efficiency leads to reduced power consumption. - Adjustable output voltage provides flexibility in various applications. - Overcurrent and thermal protection enhance reliability and safety.

Disadvantages: - Limited output current capacity (up to 1A). - Requires external components for proper operation.

Working Principles

The TL2845DG4-8 operates as a linear voltage regulator. It compares the feedback voltage with a reference voltage and adjusts the pass transistor to maintain a stable output voltage. The error amplifier continuously monitors the output voltage and adjusts the pass transistor accordingly. The compensation pin ensures stability by connecting an external capacitor for frequency compensation.

Detailed Application Field Plans

The TL2845DG4-8 finds applications in various electronic devices that require a stable and adjustable output voltage. Some common application fields include: - Power supplies for microcontrollers and other digital circuits - Battery charging circuits - Automotive electronics - Industrial control systems - LED lighting systems

Detailed and Complete Alternative Models

• LM317: Adjustable voltage regulator with higher output current capacity.
• LM7805: Fixed 5V voltage regulator with higher output current capacity.
• LT1083: Adjustable voltage regulator with higher output current capacity and lower dropout voltage.

These alternative models offer similar functionality but may have different specifications and package options.

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