MC34063ACN
Overview
The MC34063ACN 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.
Why Choose This Part
The primary advantage is its extreme flexibility, allowing it to function as a buck, boost, or inverter with a minimum number of external components. It supports a wide input voltage range from 3.0V to 40V and includes internal current limiting to protect against output overloads.
Applications
Getting Started
Designing with the MC34063ACN requires calculating external resistor and capacitor values for the oscillator frequency and output voltage divider. Many online calculators and the datasheet provide standard formulas for these passive components. For prototyping, the PDIP-8 package is breadboard-compatible, but careful PCB layout of the high-current loops is essential to minimize switching noise.
MC34063 Family
Comparing specs that differ across variants. The current part is highlighted.
| Part Number | Sw. Freq | Temp Range | Voltage - Output (Max) | Stock |
|---|---|---|---|---|
| MC34063ACN (this part) | — | — | — | 834 |
| 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 |
| MC34063ABD-TR Tape & Reel | 33k | -40degC ~ 85degC (.. | 38V | 59,132 |
