Low Dropout Regulators for Power Management Technology

Low Dropout Voltage Regulators (LDO) are a type of linear voltage regulator with low quiescent current and very low voltage loss. For digital circuits, low dropout regulators must be efficient and also handle rapidly changing demands for output currents. This is especially true for low power microcontroller-based systems where the microcontroller may turn peripherals on and off, change clock speed, and enter or leave low power modes to save power. An LDO must handle these rapidly changing current requirements with no lag.