L7805CDT-TR

L7805CDT-TR

Part Number: L7805CDT-TR

Manufacturer: STMicroelectronics

Description: IC REG LINEAR 5V 1.5A DPAK

Shipped from: Shenzhen/HK Warehouse

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L7805CDT-TR Description

The L78 Series of three-terminal positive regulators can be used for many different things because of their flexible design, wide range of output voltages, and different package options (TO-220, TO-220FP, D2PAK, and DPAK). Rather than dealing with the distribution issues that come with a single regulation point, these regulators can handle everything on-card locally. Each model has built-in protections against overcurrent, overheating, and unsafe operation. With a good heat sink, they can give off more than 1 A of current. In addition to regulating a fixed voltage, these devices can be used with other parts to make voltage and current changes as needed.

L7805CDT-TR Features

  • up to 1.5 A of output current.
  • Five, six, eight and a half, nine, twelve, fifteen, eighteen, and twenty-four volts are all available as outputs.
  • Safety from a heat overload.
  • Safeguards against short circuits.
  • Safeguarding the SOA handoff at the output.
  • Tolerance of 2% for output voltage (A version).
  • Assured throughout a wider range of temperatures (A version).

Design Consideration

The L78 Series of fixed voltage regulators have thermal overload protection, internal short circuit protection, and output transistor safe-area compensation. Thermal overload protection shuts off the circuit if it receives too much power. Internal short circuit protection limits the maximum current the circuit can carry. Compensation capacitors are not necessary for many applications with a modest current. On the other hand, if the regulator is connected to the power supply filter with long lengths or if the output load capacitance is significant, it is recommended that a capacitor bypass the regulator input.

To guarantee reliable functioning in any load condition, an input bypass capacitor should be chosen to deliver satisfactory high-frequency characteristics. Choose a tantalum, mylar, or another capacitor with low internal impedance at high frequencies, preferably with a capacity of 0.33 microfarads or more. Mounting the bypass capacitor so that its leads are as short as feasible and placed immediately across the input terminals of the regulator is the correct way to do it. Since the regulator does not have an external sensing lead, good construction techniques should be employed to reduce the likelihood of ground loops and drops in lead resistance. Incorporating an operational amplifier makes it possible to adjust to higher or intermediate values while preserving the system’s regulating characteristics. The setup produces a minimum voltage of 2 volts higher than the regulator.

What is a Linear Voltage Regulator?

In most cases, the voltage provided to electronic systems by their power supplies is more than necessary for the electronic system’s components to function correctly. For instance, a 9 V battery may supply power to an amplifier that calls for an input range of 0 to 5 V, or two 1.5 V batteries linked in Series could supply power to a circuit with 1.8 V digital logic. Both of these examples involve the use of a single power source. A 0–10 V amplifier could be powered by a battery of 12 V. We need to regulate the input power using a component that can take in a greater voltage and output a lower voltage to accomplish this.

How Does a Linear Voltage Regulator Work?

Low-dropout linear regulators (LDOs) use a transistor controlled by a negative-feedback circuit to maintain a constant output voltage regardless of changes in the input voltage and load current.  Linear voltage regulators are also known as low-dropout linear regulators or LDOs. Low-dropout linear regulators are another name for what is more often known as linear voltage regulators.

The diagram on the right illustrates a fundamental linear regulator that has three terminals and produces a constant output voltage. This regulator has a fixed output value. The user can fine-tune the output voltage of certain linear regulators by adding an extra resistor and using it in conjunction with the regulator.

Drawbacks of Voltage Linear Regulators

The low-efficiency linear regulators typically exhibit in various contexts is a significant drawback of using these regulators. A high input-to-output voltage differential with a high load current will result in significant power dissipation. Because the regulator’s transistor is coupled to the input and output terminals, it acts like a variable series resistance. The current needed for the operation of the regulator’s internal circuitry also contributes to the scattered total power, which is indicated as IGND on the schematic.

Thermal reasons, as opposed to purely electrical ones, are likely to cause a linear regulator circuit to fail before it fails for any other reason. The component’s temperature will rise due to the power lost by the regulator integrated circuit (IC). Suppose there are not sufficient pathways that allow heat to move away from the regulator. In that case, the temperature may eventually reach a point where it is high enough to hinder performance or cause a serious temperature seriously. This significant problem is discussed in the AAC’s paper, which focuses on linear regulators’ thermal design.

Final Thoughts

Standard voltage regulation issues are resolved with the help of STMicroelectronics’ L7805CDT-TR linear regulator. The average dropout voltage at 1A current is 2 V. This voltage regulator has one output that can generate up to 1.5 A of current. Applying this solution, which does not exceed 35 V, will provide ample power for your circuit. This is state-of-the-art power management, with a constant 5 V at the output. Use the 100-mV load and the 100-mV line regulation to maintain a stable current. This part will be taped and reeled for shipment to facilitate efficient installation and secure transport. This voltage regulator can be used in temperatures between freezing and boiling. It has a constructive polarity.

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