Table of Contents
The MC34063 Series is a monolithic control circuit containing the primary functions required for DC-DC converters. These devices consist of an internal temperature compensated reference, comparator, controlled duty cycle oscillator with an active current limit circuit, driver, and high current output switch.
This series was specifically designed to be incorporated in Step-Down and Step-Up and Voltage-Inverting applications with a minimum number of external components.
Schematic MC34063 5V Buck Converter
Features MC34063 5V Buck Converter
- Operation from 3.0 V to 40 V Input
- Low Standby Current
- Current Limiting
- Output Switch Current to 1.5 A
- Output Voltage Adjustable
- Frequency Operation to 100 kHz
- Precision 2% Reference
- NCV Prefix for Automotive and Other Applications Requiring
Bom MC34063 5V Buck Converter
| Name | Designator | Footprint | Quantity |
| Semiconductors | |||
| MC34063 | U4 | SOP-8 – Inverting Regulator – Buck, Boost, Switching |
1 |
| SS14 | D1 | SMA(DO-214AC) – Schottky Diode | 1 |
| Resistors | |||
| R270 (271) | R8 | 2512 | 1 |
| 6k2 (622) | R9 | 0603 | 1 |
| 2k (202) | R10 | 0603 | 1 |
| Capacitors | |||
| 100p | C7 | 0603 – Ceramic capacitor | 1 |
| 470u | C8 | Electrolytic capacitor – 8.0×10.5 | 1 |
| 100u | C9 | 1206 – Ceramic capacitor | 1 |
| Miscellaneous | |||
| TERMINAL_BLOCK 1×2-2.54 | U2,U1 | Terminal block 1×2-2.54 | 2 |
| 100uH | L1 | Inductor SMD – 10.0×10.2 mm | 1 |
Download files, PCB in PDF, Gerber, PNG, and SVG
References, Links, and Notes
- Datasheet mc34063
- AN920/D Theory and Applications of the MC34063 and A78S40 Switching Regulator Control Circuits
- Calculator for mc34063
- Download sx-emcalc 1.1 electronics calculator
Source: https://oshwhub.com/Keridium/tpa3128d2
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