LX1675ILQ-TR

Voltage/Current - Output 3:	Controller
Supplier Device Package:	38-MLPQ (5x7)
Package / Case:	38-VFQFN Exposed Pad
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C (TA)
Voltage - Supply:	4.5 V ~ 24 V
w/Sequencer:	Yes
w/Supervisor:	No
w/LED Driver:	No
Series:	LoadSHARE™
Voltage/Current - Output 2:	Controller
Voltage/Current - Output 1:	Controller
Frequency - Switching:	600kHz
Number of Outputs:	4
Function:	Any Function
Topology:	Step-Down (Buck) Synchronous (3), Linear (LDO) (1)
Part Status:	Obsolete
Packaging:	Tape & Reel (TR)

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Introduction to LX1675ILQ-TR

The LX1675ILQ-TR is a highly integrated power management integrated circuit (PMIC) designed by Linear Technology, that offers a wide range of switching and linear voltage regulators, plus a variety of power control and monitoring functions in a single package.

Application Fields of LX1675ILQ-TR

The LX1675ILQ-TR is designed to be used in a wide range of applications, such as servers, desktop PCs, notebooks, and mobile devices. It can also be used in general embedded systems and industrial applications.

Working Principle of LX1675ILQ-TR

LX1675ILQ-TR is based on a switching + linear regulator architecture, which allows for high efficiency operation at low output currents. The regulator schematic of the LX1675ILQ-TR consists of two stages: a switching regulator stage (the biased synchronous buck regulator) that operates at high efficiency, and a linear regulator stage that operates at low output current levels.The buck regulator operates by controlling the ON/OFF state of the switching regulator power switch, and altering the duty cycle of the switch to regulate the output voltage. This is known as pulse width modulation (PWM) control. The value of the output voltage is determined by the control voltage (VOUT) and the resistor divider network.The linear regulator in the LX1675ILQ-TR consists of an Error Amplifier (EA), a Current Limit Circuit (CLC) and an output driver. The EA provides a control signal to the output driver, which is proportional to the difference between a reference voltage and the output voltage (VOUT). The CLC sets an upper limit on the current that can flow through the output driver.

Conclusion

The LX1675ILQ-TR is a highly integrated power management integrated circuit from Linear Technology, which combines linear and switching regulators, plus a wide variety of power control and monitoring functions in a single package. It is designed to be used in a wide range of applications in both embedded systems and industrial applications. The LX1675ILQ-TR uses a switching + linear regulator architecture, which allows for efficient operation at low output current levels.

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