L7805ACD2TTR device package

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.

Table of Contents

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

Features

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

Applications

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

Specifications

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: 125^OC
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 2^nd circuit stage is the diode rectifier which converts the 5VAC to 5VDC. The 3^rd 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

L7805ACD2T-TR Related Products Prices

Parts	Mfr.	Description	Stock	Prices
L7805ACD2T-TR	STMicroelectronics	IC REG LDO 5V 1.5A D2PAK	24082	$0.421 Lowest
L7805ACV	STMicroelectronics	IC REG LDO 5V 1.5A TO220AB	621	$0.169 Lowest
L7805ACV-DG	STMicroelectronics	IC REG LDO 5V 1.5A TO220	696	$0.191 Lowest
L7805ACV-DG	STMicroelectronics	IC REG LDO 5V 1.5A TO220	696	$0.191 Lowest