STM817LM6F

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The STM817LM6F is a low dropout linear regulator supervisors, which belongs to the PMIC - Supervisors family. It is widely used in small power computing and communication applications, such as notebook computers, tablets, mobile phones, and other consumer electronics. The STM817LM6F can provide both voltage regulation and temperature monitoring in order to make sure the device is running efficiently.

The STM817LM6F application field includes power supply management for clock CPU and embedded system, high current power supply, voltage adjustment and compensation, power management for low power device and portable communication equipment, and display power management. The range of input voltage of STM817LM6F is from 2.7V to 18V, and its output voltage can achieve 0.9V-4.3V.

The working principle of the STM817LM6F is based on three blocks: regulator block, power-on reset block and under-voltage lockout block. Firstly, the regulator block is used to maintain stable output voltage through adjusting the drain current of the internal MOSFET or by decreasing the resistance of the external resistor, which changes with the varying of the output voltage. Secondly, the power-on reset block is used to reset the system immediately upon system power up or system power down. Thirdly, the under-voltage lockout block is used to detect the output voltage, and when the voltage drops below the factory-programmed level, the under-voltage lockout block will power off the system, thus protecting the system from further damage.

The STM817LM6F contains an adjustable output voltage and an adjustable temperature-sensing feature. The adjustable output voltage is achieved by two methods: an internal MOSFET operating in a fixed-gain configuration or an external resistor connected to the feedback pin of the device. Besides, when the external temperature exceeds the set threshold, the output voltage of the STM817LM6F will be automatically reduced in order to protect the system against temperature-caused damage. This feature makes the STM817LM6F ideal for temperature-sensitive applications and gives them efficient fault protection.

In order to reduce the power losses, the STM817LM6F is designed with a “slow start” function. This function slowly increases the voltage at the output and prevents current inrush which is unnecessary power dissipation. Furthermore, the STM817LM6F comes with an internal ESD protection relative to the power supply, output and ground for reliable device operation. Additionally, it has also built-in over-current protection and short-circuit protection which can keep the device safe from external damage and ensure its stable performance.

With its low dropout voltage, low quiescent current, adjustable output voltage and adjustable temperature-sensing feature, the STM817LM6F is a powerful linear regulator supervisors that can be used in many different applications. It is a reliable, cost-effective device and suitable for small power computing and communication applications.

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