SG7905T-JAN

Series:	Military, MIL-STD-883
Packaging:	Tray
Part Status:	Active
Number of Regulators:	1
Current - Output:	100mA
Operating Temperature:	-55°C ~ 125°C
Mounting Type:	Through Hole
Package / Case:	TO-205AD, TO-39-3 Metal Can
Supplier Device Package:	TO-39
Base Part Number:	SG7905

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SG7905T-JAN Application Field and Working Principle

SG7905T-JAN is a type of Linear Voltage Regulator (LVR) which is used in Power Management Integration Circuit (PMIC). It is suitable in many applications such as DVD, DVD recorder, digital camera, digital camcorder, and consumer electronics DAC controller. It is a low dropout, three-terminal regulator which needs a small headroom voltage.

Overview of SG7905T-JAN Voltage Regulator

SG7905T-JAN voltage regulator offers low operating current and dropout voltage, which makes it ideal for use in battery-powered applications. This voltage regulator provide an output voltage regulation between 1.2V to 3.3V with a line regulation of 0.1%. It features a maximum output current of 1.5A for a given input source. The quiescent current drawn by this voltage regulator is as low as 0.8mA. The maximum continuous output current is 1100mA. The output impedance is also very low, typically 0.2Ω.

Features and Benefits

SG7905T-JAN voltage regulator offers a wide range of features and benefits. It is a very efficient regulator, with an efficiency of up to 95%. This regulator has the ability to regulate output voltage within an accuracy of 0.2%, even under tight load conditions. This is especially useful in applications where high accuracy is necessary, such as digital camera use. Additionally, this regulator has a Green Power Saving Mode that can reduce the output voltage to its minimum input voltage, thus saving power. The EN/UVLO control pin is used to enable/disable the standby mode. The EN/UVLO pin also monitors the input voltage to ensure an efficient and safe operation of the voltage regulator.

Protection Features

SG7905T-JAN voltage regulator also offers additional protection features. It has reverse current protection to protect against back-biasing from the output voltage. Over-voltage protection is also provided to protect the circuit from over-voltage input. The over-voltage protection can be adjusted to a preset maximum threshold. The over-current protection feature prevents the output from exceeding the set limit during short-circuit condition.

Application Field of SG7905T-JAN Voltage Regulator

SG7905T-JAN voltage regulator is suitable for many applications ranging from digital cameras, DVD, DVD recorder, digital camcorder, consumer electronics, and DAC controllers. It is also well-suited for power management in any battery-powered device. This regulator is ideal for applications that require high accuracy and low quiescent current, as it offers good line regulation and low dropout voltage.

Working Principle of SG7905T-JAN Voltage Regulator

SG7905T-JAN voltage regulator operates based on the principle of pass-transistor linear voltage regulation. This regulator features an internal power-balancing power transistor, which forms a series pass element with the input voltage and the output voltage. Thus, this regulator continuously adjusts the reference voltage and the power transistor’s operating point in order to maintain the set output voltage. The pass transistor is a short-circuit current limited device, which permits a maximum continuous output current. A control circuit is used to turn off the pass transistor whenever the current limit is reached. The control circuit also prevents the output from exceeding the set limit during a short-circuit condition. The output voltage stability is ensured by controlling the operating point of the pass transistor. The gate of the transistor is controlled with a feedback circuit that senses the output voltage. If the output voltage is too high, the feedback circuit will adjust the gate and the operating point of the pass transistor to reduce the output voltage.

Conclusion

SG7905T-JAN voltage regulator is a low dropout, three-terminal linear voltage regulator which offers high efficiency and good line regulation. It is suitable for many applications including consumer electronics, DVD recorders, digital cameras, digital camcorder, and DAC controllers. This regulator has a Green Power Saving Mode that can reduce the output voltage to its minimum input voltage, thus saving power. It features protection features such as over-voltage, reverse current, and over-current protection, which are very important for any power device. The working principle of SG7905T-JAN voltage regulator is based on the pass-transistor linear voltage regulation principle.

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