NCP305LSQ15T1G

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The NCP305LSQ15T1G is a low drop out (LDO) linear regulator integrated circuit designed to be used in multiple applications. The NCP305LSQ15T1G is commonly used as a supervisor IC in point-of-load voltage regulators, usually located in motherboard or embedded systems.

The NCP305LSQ15T1G supervisor IC monitors voltage levels and constantly regulates the output in relation to a reference voltage. It is particularly suited for applications in which board-space saving is a priority. This device offers 3.2 - 0.4V of adjustable output voltage, current limiting, and low dropout voltage (50mV @ 100mA). Its typical quiescent current is 7 uA.

The NCP305LSQ15T1G’s optimized output impedances, combined with its ultra-low supply current and wide operating temperature range ( -40°C to +125°C ), make it an ideal choice for power control applications where a low dropout regulator is required. It’s other notable features include over temperature protection, under voltage protection, over current protection, and short circuit protection.

The NCP305LSQ15T1G uses a resistive voltage divider to monitor and adjust the output voltage. A reference voltage is set by applying an internal voltage at the reference pin. This voltage sets the level at which the output voltage will be regulated. The voltage divider network consisting of two external resistors is used to monitor the output voltage. If the output voltage is greater than the reference voltage, the output of the voltage divider will be greater than 1.25V. This will activate the error amplifier and the control circuit connected to it, which will then decrease the output voltage to the desired level.

If the output voltage is below the reference voltage, the output of the voltage divider will be below 1.25V, thus activating the error amplifier and the control circuit to increase the output voltage. The voltage regulation is accomplished by an internal error amplifier, a voltage divider, an input bias current, and a control circuit. The NCP305LSQ15T1G also offers a low noise of 40 uVpp, which is less than 20 dB below the reference voltage, and a shutdown pin for system power control.

These features make the NCP305LSQ15T1G an excellent choice for applications such as cellular phones, PDAs, digital cameras, laptop computers, set-top boxes, and other portable electronic devices that require precise voltage regulation in tight board-space environments. The NCP305LSQ15T1G device is also suited for applications in which suppressed load transients and increased efficiency are necessary.

In conclusion, the NCP305LSQ15T1G is an ideal choice for systems requiring high-accuracy voltage regulation in tight spatial constraints. Its various features make it suitable for various types of applications and its wide temperature range and ultra-low supply current make it an ideal supervisor IC for power control.

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