UA7805CKTTR device package

UA7805CKTTR schematic symbol

The modern electronic circuits and devices operate on low level DC voltages. The low DC voltage operation makes these electronic devices battery powered, portable, and compact-sized. The common operating voltage range of digital electronic devices is 3.3V to 5V. Often there is a requirement of providing the DC voltage to the circuit using AC main power supply. In these cases, rectifiers, capacitors, and voltage regulators are used for the conversion and stepping down of AC voltage. The DC voltage obtained at the terminals of diode rectifier has a large ripple component present in it which degrades the power quality. A filtering capacitor is used to smooth the voltage ripple however some ripple still exists even after filtering. Hence, a voltage regulator IC is used to obtain a stable and ripple-free DC voltage. This ripple-free DC voltage is then provided to the electronic components such as microcontrollers and LCDs.

Table of Contents

What is UA7805CKTTR？

The UA7805CKTTR is an integrated fixed-voltage multi-purpose regulator developed by manufactured by Texas Instruments. This voltage regulator can be used in a wide range of applications including on-card regulation and elimination of distribution problems. The regulator is capable of delivering an output current of 1.5 A. The internal current limiter and thermal shut-down circuitry provides overload protection. When used in conjunction with external components, these regulators can be used in variable power supply circuits. They can also serve as power-pass elements in precision regulators.

Pin Configuration

The pin configuration of the UA7805CKTTR 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 compensation
No need for output capacitors

Applications

The applications of UA7805CKTTR voltage regulator are provided as following:

On card regulation
Voltage regulation in portable devices
Computers and servers power supplies
Power supplies in telecommunication equipment
Power supply in embedded system hardware

Specifications

The major technical specifications of the UA7805CKTTR are provided as following:

Terminals: 3
Max output current: 1.5A
Output voltage: 5VDC
Maximum input voltage: 35V
Operating junction temperature: 150^OC
ESD rating: 3000 V (Human Body Model)
Ripple rejection: 68dB
Output resistance: 0.017 Ohm
Short circuit output current: 750mA
Peak output current: 2.2A

How UA7805CKTTR work?

The UA7805CKTTR is a general-purpose voltage regulator which is used very commonly 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 stage in the circuit 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 this power supply can be seen in the figure below:

UA7805CKTTR application circuit

UA7805CKTTR Related Products Prices

Parts	Mfr.	Description	Stock	Prices
UA7805CKTTR	Texas Instruments	IC REG LDO 5V 1.5A DDPAK	2276	$0.607 Lowest
UA7808CKCT	Texas Instruments	IC REG LDO 8V 1.5A TO220-3	2550	$0.281 Lowest
UA7805CKCS	Texas Instruments	IC REG LDO 5V 1.5A TO220-3	898	$0.562 Lowest