Part Number: MC34063ADR

Manufacturer: Texas Instruments

Description: IC REG BUCK BST ADJ 1.5A 8SOIC

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Technical Specifications of MC34063ADR

Datasheet  MC34063ADR datasheet
Category Integrated Circuits (ICs)
Family PMIC – Voltage Regulators – DC DC Switching Regulators
Manufacturer Texas Instruments
Packaging Tape & Reel (TR)
Part Status Active
Function Step-Up, Step-Down
Output Configuration Positive or Negative
Topology Buck, Boost
Output Type Adjustable
Number of Outputs 1
Voltage – Input (Min) 3V
Voltage – Input (Max) 40V
Voltage – Output (Min/Fixed) 1.25V
Voltage – Output (Max) 40V (Switch)
Current – Output 1.5A (Switch)
Frequency – Switching 100kHz
Synchronous Rectifier No
Operating Temperature 0°C ~ 70°C (TA)
Mounting Type Surface Mount
Package / Case 8-SOIC (0.154″, 3.90mm Width)
Supplier Device Package 8-SOIC

Description for the MC34063A

The MC33063A and MC34063A devices are easy-to-use integrated circuits (ICs) with all the necessary circuitry to make simple DC-DC converters. Most of these parts are a driver, a comparator, a PWM controller with active current limiting, an oscillator, an internal temperature-compensated reference, a driver, and a high-current output switch. So, the devices can be used to build converters with as few external parts as possible using the boost, buck, and inverting topologies.

The MC33063A device works in temperatures from -40 to 85 degrees Celsius. The MC34063A device works in temperatures from 0 to 70 degrees Celsius.

What is MC34063ADR?

The Integrated Circuit (IC) MC34063ADR is a well-liked, adaptable choice for power supply applications. It is a monolithic control circuit with all the essential features needed for DC-to-DC converters, voltage regulators, and other power supply applications. The IC can be used in various applications because it can function over a wide input voltage range of 3V to 40V.

The IC employs pulse width modulation (PWM) to adjust the circuit’s output voltage. It has a comparator, oscillator, output driver stage, PWM controller, and precision reference voltage source. Moreover, the IC contains built-in safeguards like temperature shutdown, overcurrent protection, and short circuit protection.

High efficiency, which can reach 96%, is one of the key advantages of the MC34063ADR IC. This makes it the perfect option for power supply applications where great efficiency is essential. The IC is a well-liked option for professionals and enthusiasts alike because it is inexpensive and easily accessible.

In addition to SOIC-8, PDIP-8, and TO-263-5, the MC34063ADR IC is also offered in other packaging options. Moreover, the IC is available in various variations, including the MC34063AD, MC34063AC, and MC34063API. Selecting the proper variant for the particular application is crucial because these variants have varied specifications and performance traits.

Detailed Description

A versatile IC, the MC34063ADR, can be applied to various power supply jobs. The following are some of the most typical applications for MC34063ADR:

  • Converting DC to DC: DC-DC converters frequently employ the MC34063ADR IC to step up or down voltage levels. The IC can create Buck, Boost, or Buck-Boost DC-DC converters.
  • Voltage regulators: Voltage regulators regulate the amount of power a power supply emits. MC34063ADR is also used in these devices. The IC can be used to create voltage regulators that are both switching and linear.
  • LED drivers: The MC34063ADR IC can drive LEDs and regulate their brightness. A constant voltage or constant current LED driver can be created using the IC.
  • Battery chargers: The IC can create batteries, sometimes called “batteries.” The Chip can be used to create both switching and linear battery chargers.

The MC34063ADR may also be utilized in inverter circuits, which convert DC power into AC power. The IC can create inverters for both sine and square waves.

A constant current LED driver for an automotive application, a linear voltage regulator for a low-power application, a square wave inverter for an emergency backup power supply, and a boost converter for a solar-powered device are all designed using the MC34063ADR IC.

Features for the MC34063A

  • 3 to 40 volts is a large input voltage range.
  • Up to 1.5 A for high output switch current.
  • Oscillator Frequency: 100 kHz or higher.
  • Internal Precision Reference: 2%.
  • Current Limiting for Short Circuits.

The adaptable IC MC34063ADR can be utilized in various power supply applications. The following are some of the frequent uses for MC34063ADR:

DC-DC converters To step up or down voltage levels, DC-DC converters frequently employ the MC34063ADR IC. The IC can create DC-DC converters that are Buck, Boost, and Buck-Boost.

  • Voltage regulators: To control the output voltage of a power supply, voltage regulators employ the MC34063ADR. The IC can be used to create voltage regulators that are switching or linear.
  • LED drivers: To regulate the brightness of LEDs, the MC34063ADR IC can be used as an LED driver. Both constant current and constant voltage LED drivers can be created using the IC.
  • Battery chargers: With the IC, battery chargers can be created to charge batteries. The IC can be utilized to create switching and linear battery chargers.

Inverter circuits are used to transform DC power into AC power, and the MC34063ADR can also be used in these circuits. Both sine wave inverters and square wave inverters can be designed using the IC.

Designing a Buck converter for a battery-powered device, a Boost converter for a solar-powered device, a constant current LED driver for an automotive application, a linear voltage regulator for a low-power application, and a square wave inverter for an emergency backup power supply are a few examples of how the MC34063ADR IC is used in these applications.

MC34063ADR Overview

The DC-DC converters, inverters, and switching regulators can all be controlled by the single-piece control circuit known as the MC34063ADR. Because of its adaptability and low cost, it is produced by numerous semiconductor firms and employed in various settings.

The following are some of the MC34063ADR IC’s key characteristics:

  • Range of the input voltage: 3V to 40V
  • Range of output voltage: 1.25 to 36 volts
  • The current output of up to 1.5A is feasible.
  • Switching frequency: up to 100kHz
  • a built-in oscillator
  • Defending against a short circuit
  • safeguarding against heat
  • Wide temperature range: -40 to 85 degrees Celsius
  • minimal current draw

The MC34063ADR has a PWM control circuit, output driver, comparator, oscillator, voltage reference, numerous protection circuits, and an output driver.

Oscillators power PWM control circuits. A reliable voltage reference is compared to the output voltage. Comparing the reference and output voltage generates a PWM signal that controls the output driver. PWM signals toggle the output driver’s output voltage.

The MC34063ADR outperforms other ICs since it’s cheap, efficient, and easy to use. It’s easy to use because it comes in various containers, including the 8-pin SOIC container.

The MC34063ADR has some drawbacks. Its maximum output current is low compared to other ICs, and its internal circuitry may be susceptible to noise and voltage changes. The circuit also needs inductors, capacitors, and resistors, which may increase its cost and complexity.

Power Supply Recommendations

The input range for this device is 3 V to 40 V. On the input, it is advised to have a 1000-F decoupling capacitor.


● Layout Guidelines

Reduce the length of the feedback loop layout traces as much as possible to prevent needless IR drops. The decoupling capacitor’s input loop should also be as little as possible. To manage the greater current, it is recommended that the trace from VIN to pin 1 of the devices be thicker.


To summarize, the MC33063A and MC34063A integrated circuits are user-friendly and feature all the circuitry for simple DC-DC converters, including boost, buck, and inverting topologies, with few external components. The MC34063ADR IC is a popular power supply IC with a 3V to 40V input voltage range and 96% efficiency. Professionals and enthusiasts utilize it for voltage regulators, LED drivers, battery chargers, and inverter circuits due to its price and accessibility. Several semiconductor firms use the MC34063ADR IC for its broad use and affordable cost. Contact ICRFQ today to order low-cost MC34063ADR or other high-quality electronic components.

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