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    L7805ACD2TTR device package

    L7805ACD2TTR device package

    L7805ACD2TTR schematic symbol

    L7805ACD2TTR schematic symbol

    Almost all modern digital electronic devices require low level DC voltages for their operation. This low DC voltage allows these electronics systems to be battery-powered, portable, lightweight and safe. The typical power supply voltage range for such devices is 3.3V to 5V. Many digital electronic devices require AC mains power supply for charging or direct powering up. In such cases rectifier circuits are required to convert the AC power to DC power. These rectifier circuits use diodes, capacitors and voltage regulators to provide low level DC voltage to the electronic components. When a diode bridge converts the AC voltage to DC voltage, the output voltage contains high ripple content which degrades power quality. Capacitors along with voltage regulators are used in such circuits to remove the ripple and provide a stable DC voltage to the electronic load such as microprocessors or LCDs.

    What is L7805ACD2T-TR?

    The L7805ACD2T-TR is an integrated three terminal positive voltage regulator manufactured by ST Microelectronics. This general-purpose voltage regulator can be used in a number of applications including on-card regulation and distribution problems associated with single point regulation. The regulator is capable of delivering an output current of 1.5 amperes. The internal current limiter and thermal shut-down circuitry make this device virtually indestructible. These regulators can also be used in conjunction with external components to construct variable power supply circuits. For current outputs greater than 1A, the regulator should be used with a heat sink to avoid burn-out.

    Pin Configuration                     

    The pin configuration of the L7805ACD2T-TR linear voltage regulator is given in the table below:

    Pin name Pin description
    Common Ground pin
    Input Supply input
    Output Voltage output


    • 3 terminal device
    • Stable 5V DC output
    • Output current up to 1.5A
    • Internal thermal overload protection
    • High power dissipation capability
    • Internal current limiter for short circuits
    • Output transistor safe-area protection
    • 2% output voltage tolerance
    • Extended temperature range


    The applications of L7805ACD2T-TR voltage regulator are provided as following:

    • On card regulation
    • Voltage regulation in portable devices
    • Computer and server power supplies
    • Power supplies in telecom equipment
    • Power supply in embedded system circuits


    The major technical specifications of the L7805ACD2T-TR are provided as following:

    • Terminals: 3
    • Max output current: 1.5A
    • Output voltage: 5VDC
    • Dropout voltage: 2V
    • Maximum input voltage: 35V
    • Operating junction temperature: 125OC
    • Output resistance: 17 mOhm
    • Short circuit output current: 200mA
    • Peak output current: 2.2A

    How L7805ACD2T-TR work?

    The L7805ACD2T-TR is a general-purpose linear voltage regulator which is very widely used in power supply circuits. One of the most common 7805 based circuit is the full wave diode rectifier power supply. In this power supply, the first stage is a power transformer which steps down 220/120VAC to 5VAC. The 2nd circuit stage is the diode rectifier which converts the 5VAC to 5VDC. The 3rd stage in the circuit is the 7805 regulator which removes the ripple from the converted DC voltage and provides a stable DC voltage at the output.

    The application circuit of such a power supply is given in the figure below:

    L7805ACD2TTR application circuit

    L7805ACD2TTR application circuit

    L7805ACD2T-TR Related Products Prices

    PartsMfr.DescriptionStockPricesBuy Now
    L7805ACD2T-TRSTMicroelectronicsIC REG LDO 5V 1.5A D2PAK24082$0.421 Lowest
    L7805ACVSTMicroelectronicsIC REG LDO 5V 1.5A TO220AB621$0.169 Lowest

    L7805ACV-DGSTMicroelectronicsIC REG LDO 5V 1.5A TO220696$0.191 Lowest
    L7805ACV-DGSTMicroelectronicsIC REG LDO 5V 1.5A TO220696$0.191 Lowest



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