EmbeddedRelated.com
The 2026 Embedded Online Conference
    Parts    MC34063EBD-TR
MC34063EBD-TR

MC34063EBD-TR

STMicroelectronics
Buck, Boost Switching Regulator IC Positive or Negative Adjustable 1.25V 1 Output 1.5A (Switch) 8-SOIC (0.154", 3.90mm Width)
Active18,130 in stock
Datasheet Digi-Key Compare Prices

Overview

The MC34063EBD-TR is a versatile monolithic control circuit containing the primary functions required for DC-to-DC converters. It features an internal temperature compensated reference, a comparator, an oscillator, and a high-current output switch capable of handling up to 1.5A.

Why Choose This Part

This regulator offers exceptional flexibility by supporting buck, boost, and inverting topologies with a wide input voltage range of 3V to 40V. Its integrated 1.5A switch reduces external component count, while the low standby current of 1.5mA to 2.5mA aids in power-sensitive designs.

Applications

Step-Down (Buck) Converters
Efficiently reducing a higher input voltage to a regulated lower output voltage for digital logic or peripheral rails.
Step-Up (Boost) Converters
Increasing battery or low-bus voltages to higher levels required by sensors or actuators.
Voltage Inverting Converters
Generating negative voltage rails from a positive input supply, common in analog signal conditioning circuits.

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 33kHz
Operating Temperature -40degC ~ 125degC (TA)
Synchronous Rectifier No
Voltage - Input (Max) 40V
Voltage - Input (Min) 3V
Voltage - Output (Max) 38V
Supplier Device Package 8-SOIC
Voltage - Output (Min/Fixed) 1.25V

Getting Started

To implement a design, calculate the timing capacitor value for the 33kHz oscillator and select external resistors to set the 1.25V reference-based output. Ensure the peak current does not exceed the 1.5A switch limit by utilizing the active current limit pin with a low-value sensing resistor.

MC34063 Family

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

Part Number Sw. Freq Temp Range Voltage - Output (Max) Stock
MC34063EBD-TR (this part) Tape & Reel 33k -40degC ~ 125degC .. 38V 18,130
MC34063ADR (Texas Instruments) 100k 0degC ~ 70degC (TA) 40V 88,763
MC34063ADR2G (onsemi) 100k 0degC ~ 70degC (TA) 40V 7,456
MC34063ACD (On Semiconductor) 33k 0degC ~ 70degC (TA) 38V 3,238
Also available as: MC34063A
The 2026 Embedded Online Conference