MIC5320-SSYD6-TR

Linear voltage regulators are basic building blocks for a wide range of analog designs because of their simplicity, low cost, and good enough performance. Micrel\'s MIC5320-SSYD6-TR is a low-dropout (LDO) voltage regulator that provides spacesaving solution and excellent line-load regulation. It has a wide input voltage range of 2.5V to 12V, and can outputs up to 250mA

Application Field

The MIC5320-SSYD6-TR is designed to provide a regulated source of 2.5V to 5.5V, and it is ideally suited for applications requiring low noise and fast transient response. Due to its low minimum operating voltage, this LDO voltage regulator is suitable for the applications that require supply voltage from the battery.

Some application of the MIC5320-SSYD6-TR includes powering small peripherals, wide range of portable systems such as digital cameras, PDAs, MP3 players, cellular phones, and other battery-powered devices. It is also used as a post regulator for switching power supplies and to limit inrush current during turn-on.

Working Principle

Linear voltage regulators require a voltage source, a series resistor and the regulator. In the case of the MIC5320-SSYD6-TR, the voltage source is typically a battery, the series resistor is usually a high resistance resistor or a resistor divider, and the regulator is an integrated circuit.

The regulator has two inputs: the input voltage, and the reference voltage output. In the case of the MIC5320-SSYD6-TR, when the input voltage is greater than the output, the regulator turns on, allowing a small amount of current to pass from the input to the output. This small current prevents the drop in output voltage. If the input voltage drops below the output voltage, the regulator turns off and all current is blocked between the input and the output.

When the regulator is in the on state, the output of the regulator is equal to the reference voltage set by the resistor divider. This reference voltage changes depending on the current drawn by the load. The MIC5320-SSYD6-TR has a dynamic output impedance that compensates and provides noise rejection across all loads.

The MIC5320-SSYD6-TR offers fast transient response to changes in load current and input voltage. It is also provided with shutdown pin that provides power saving during periods of no load. The MIC5320-SSYD6-TR can draw as low as 0.4mA of operating current to minimize power consumption in battery operated equipment.

Conclusion

The MIC5320-SSYD6-TR low dropout voltage regulator is ideal for use in a wide variety of high performance, portable and battery powered applications. It offers a spacesaving solution and excellent line-load regulation, fast transient response and low power consumption. Furthermore, it has a wide range of input voltage, up to 250mA current capability and is easy to use and set up.