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MC34063ADR

TIMC34063ADR

Texas Instruments
Buck, Boost Switching Regulator IC Positive or Negative Adjustable 1.25V 1 Output 1.5A (Switch) 8-SOIC (0.154", 3.90mm Width)
Active88,763 in stock
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Overview

The Texas Instruments MC34063A is a monolithic switching regulator capable of both step-up (boost) and step-down (buck) conversions, as well as voltage-inverting applications. It integrates all the necessary active components for a DC-DC converter, including an internal 1.5A output switch. This versatile IC operates over a wide input voltage range from 3V to 40V and offers an adjustable output from 1.25V.

Why Choose This Part

Engineers choose the MC34063ADR for its versatility in handling buck, boost, and inverting topologies with a single IC. Its integrated 1.5A switch current capability and adjustable output voltage provide flexibility for a range of power requirements. The component's short-circuit current limiting and low standby current contribute to robust and efficient designs.

Applications

Local DC-DC Conversion
Providing on-board voltage regulation for various circuits from a common power rail, handling both buck and boost requirements within a single design.
Battery-Powered Devices
Efficiently generating required voltages from battery sources, especially where input voltage can fluctuate above or below the target output.
Negative Voltage Generation
Creating negative supply rails for operational amplifiers or other circuits that require bipolar power supplies, using a simple charge pump configuration.
Automotive Electronics
Suitable for non-critical automotive applications where a robust, flexible DC-DC conversion solution is needed within the 0 to 70C operating temperature range.
Industrial Control Systems
Powering sensors, actuators, or control logic in industrial environments that demand reliable voltage regulation from variable input sources.
General Purpose Power Supplies
As a building block for low-power adjustable switching power supplies in laboratory or prototyping setups.

Key Specifications

Function Step-Up, Step-Down
Topology Buck, Boost
Output Type Adjustable
Mounting Type Surface Mount
Package / Case 8-SOIC (0.154", 3.90mm Width)
Current - Output 1.5A (Switch)
Number of Outputs 1
Output Configuration Positive or Negative
Frequency - Switching 100kHz
Operating Temperature 0degC ~ 70degC (TA)
Synchronous Rectifier No
Voltage - Input (Max) 40V
Voltage - Input (Min) 3V
Voltage - Output (Max) 40V (Switch)
Supplier Device Package 8-SOIC
Voltage - Output (Min/Fixed) 1.25V

Getting Started

To get started, refer to the MC34063A datasheet for application circuits and design equations for various topologies. Prototyping can be done on a breadboard or perfboard. Calculations for inductor size, capacitor values, and resistor dividers for output voltage setting are critical for proper operation.

MC34063 Family

Comparing specs that differ across variants. The current part is highlighted.

Part Number Sw. Freq Temp Range Voltage - Output (Max) Stock
MC34063ADR (this part) 100k 0degC ~ 70degC (TA) 40V 88,763
MC34063EBD-TR (STMicroelectronics) Tape & Reel 33k -40degC ~ 125degC .. 38V 18,130
MC34063ADR2G (onsemi) 100k 0degC ~ 70degC (TA) 40V 7,456
MC34063ACD (On Semiconductor) 33k 0degC ~ 70degC (TA) 38V 3,238
Also available as: MC34063A
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