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Fundamentals
Voltage Divider
Ohm's Law
LED Series Resistor
Parallel Resistors
Power Dissipation
Filters & Timing
RC Time Constant
RC Low-Pass Filter
RC High-Pass Filter
LC Resonant Frequency
555 Timer — Astable
555 Timer — Monostable
Capacitor Impedance
PWM Duty Cycle
Op-Amps
Op-Amp Inverting Gain
Op-Amp Non-Inverting Gain
Power Conversion
Buck Converter Inductor
Boost Converter Inductor
LM317 Voltage Regulator
Linear Reg Dropout Power
MOSFET Gate Resistor
Dead-Time Calculator
PCB Layout
PCB Trace Width
Via Current Capacity
Trace Impedance
Thermal & Power
Heatsink Thermal Resistance
Battery Life
Digital & Interface
I²C Pull-Up Resistor
ADC Resolution
Wheatstone Bridge
Power Conversion
Buck Converter Inductor
Minimum inductance for a synchronous buck converter.
f(x)
Lmin = Vout·(Vin−Vout) / (Vin·fsw·ΔIL)
Presets
5V/2A from 12V
3.3V/1A from 5V
1.8V/3A from 12V
Input Voltage
mV
V
kV
Output Voltage
mV
V
kV
Output Current
µA
mA
A
Switching Frequency
Hz
kHz
MHz
Ripple %
%
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