LK112SM33TR Integrated Circuits (ICs)

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LK112SM33TR is a PMIC – Voltage Regulator – Linear which is produced by Holtek. This voltage regulator is a high performance, low-dropout (LDO) resistor with a low noise and a very low temperature coefficient for ultra-stable voltage output. The LK112SM33TR is designed to provide a regulated output voltage with minimal power dissipation and maximum noise rejection. Its wide operating range and output current pin control make it ideal for high-density fixed voltage applications.

This device offers a very low output voltage accuracy and low power consumption, making it an ideal choice for battery-Powered devices. The output voltage range is typically 3.2V to 5.25V with a base output voltage tolerance of +/-3%. The device can also be set to an output voltage of up to 1.1V with a small resistor divider.

The LK112SM33TR features low voltage operation, fast transient response and minimum output voltage ripple. It is capable of driving a peak load current up to 1A with a maximum duty cycle rating of 1.9A. The device is also capable of delivering a constant current of 1A over its full operating temperature range.

The LK112SM33TR features a low dropout voltage in the presence of large amounts of output current. This is achieved by bypassing the internal power transistor with an external low-ESR capacitor. This device has a thermal shutdown feature that protects against excessive internal power dissipation. This feature prevents damage to the device in the event of a short circuit or excessive current load.

The LK112SM33TR is ideal for a variety of applications, such as communications, general-purpose power supplies, portable battery-powered equipment and automotive applications. The device is also suitable for use in other applications where noise immunity or low-power supply are required.

The LK112SM33TR’s working principle can be broken down into three stages. First, the voltage regulator controller compares the output voltage to the reference voltage and calculates the error voltage. This error voltage is then converted into a Gate drive signal which is sent to the internal power transistor. The Gate drive signal then controls the transistor and adjusts the output voltage accordingly.

The second stage involves the control loop which monitors the output voltage for stability. The output voltage is then monitored and compared with the reference voltage. If the output voltage is not stable or within the specified tolerance, the controller will again adjust the Gate drive signal and adjust the output voltage as required.

The third stage of operation is the current limiting circuit. This circuit will monitor the output current and limit the power transistor operation accordingly. If the output current exceeds the specified limit, the power transistor will be switched off to prevent the device from overheating.

Overall, the LK112SM33TR is an excellent choice for applications that require a high performance, low-dropout (LDO) voltage regulator with a low noise and a very low temperature coefficient for ultra-stable voltage output. It is a highly reliable device with excellent features and performance characteristics.

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