How do Linear Regulators compare to Switching Regulators?
Linear Voltage Regulators and Switching Voltage Regulators both have advantages and disadvantages when used in system power supplies. Either may be a suitable choice, depending on the requirements of the system. In general, linear regulators are a better choice when the input voltage is a few Volts higher than the output (but not closer than the regulator”s dropout voltage), and when the load current is less than about 3A. Switching regulators are a better choice when the input voltage is less than or much greater than the desired output, when multiple outputs are desired, and when power dissipation must be kept low. Linear Voltage Regulators have these advantages: • Simple • Low output ripple voltage • Excellent line and load regulation • Fast response time to load or line changes • Low electromagnetic interference (EMI). They have these disadvantages: • Low efficiency, especially with higher input voltages • Large space requirement if heatsink is needed. Switching Voltage Regulators
