MC34063 is a 8-terminal DC to DC controller IC with 3 in one functionality namely Step-up, Step- Down, and Voltage inverting, which is suitable for various common applications. This IC is designed to be high precision which is programmable with two external resistors R1& R2.
MC34063 Calculator is precisely designed to calculate accurate values. R1 is assumed to be around 1KOhm or higher for practical applications. Enter Vo (the required output voltage)
MC34063 CALCULATOR TOOL
^Nearest standard value is a generalized suggestion, you can refer to exact values for theoretical/ practical design considerations.
Important Final Values : R2 (both exact value & Standard nearest value of resistor). Resistor values are computed to the nearest 1% value also close to standard resistor value.
MC34063 Co, Ct, Rsc, L CALCULATOR
Recommended values & calculations:
Vopp= Ripple voltage ≤ 100mVolt (depends on design requirement)
Cin= 100uf (recommended)
Cout= Calculated as above
L= Maximum value (lower inductor value by calculations can be chosen to save component cost, above values should work for all design)
In the datasheet, it states that the input/ output voltage can be kept between 3.0V and 40V. And the maximum output current is limited to 1.5A. The MC34063 is made specifically designed to be incorporated in Step−Down and Step−Up and Voltage−Inverting applications with a minimum number of external components. With two external resistors, the output voltage can be adjusted. This IC have a typical oscillator frequency up to 100KHz.
The inbuilt comparator, temperature compensation, oscillator, PWM controller circuits provides in application like keeping steady the DC power supply in HMIs or making adjustable power supplies for portable devices, consumer & computing.
Datasheet:
Please refer to the following links for more detailed technical information on the effects of other parameters like voltage vs current or ripple voltage:
MC34063 Datasheet (link)
