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MC34063ABD-TR

MC34063ABD-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)
Active59,132 in stock
Datasheet Digi-Key Compare Prices

Overview

The MC34063ABD-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, a controlled duty cycle oscillator with an active current limit circuit, a driver, and a high-current output switch. This regulator can be configured for step-up, step-down, or voltage-inverting applications with a minimum number of external components.

Why Choose This Part

The device operates over a wide input voltage range from 3V to 40V and includes 2% reference accuracy for stable output control. Its ability to support boost, buck, and inverting topologies makes it a highly flexible tool for power stage design using a single IC family.

Applications

Battery Powered Equipment
Providing efficient buck or boost regulation from varying battery voltages to a stable rail.
Local On-Card Regulation
Generating point-of-load negative supply rails or boosted voltages from a standard 5V or 12V bus.
Consumer Electronics
Cost-effective power conversion for devices requiring up to 1.5A peak switch current.

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 ~ 85degC (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

Design begins by calculating external resistor values for the voltage divider and selecting an inductor and timing capacitor based on the 33kHz switching frequency. Standard application circuits for all three topologies are available in the STMicroelectronics datasheet to simplify component selection. Evaluation can be performed on a generic SO-8 breakout board or a custom prototype PCB.

Part of MC34063/MC33063 Switching Regulators family » MC34063

MC34063 Family

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

Part Number Sw. Freq Temp Range Voltage - Output (Max) Stock
MC34063ABD-TR (this part) Tape & Reel 33k -40degC ~ 85degC (.. 38V 59,132
MC34063ADR2G (onsemi) 100k 0degC ~ 70degC (TA) 40V 12,694
MC34063ACD-TR Tape & Reel 33k 0degC ~ 70degC (TA) 38V 4,037
MC34063EBD-TR Tape & Reel 33k -40degC ~ 125degC .. 38V 18,130
MC34063ADR (Texas Instruments) 100k 0degC ~ 70degC (TA) 40V 82,727
Also available as: MC34063ECD-TR, MC34063ACN, MC34063A

Also Consider

LM2576 TITexas Instruments - Offers a simpler buck-only design with a higher 3A output current capability and easier thermal management.

Categories

Power Management > Switching Regulators