A8499SLJTR-T

Synchronous Rectifier:	No
Operating Temperature:	-20°C ~ 85°C (TA)
Mounting Type:	Surface Mount
Package / Case:	8-SOIC (0.154", 3.90mm Width) Exposed Pad
Supplier Device Package:	8-SOIC-EP
Base Part Number:	A8499
Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Obsolete
Function:	Step-Down
Output Configuration:	Positive
Topology:	Buck
Output Type:	Adjustable
Number of Outputs:	1
Voltage - Input (Min):	8V
Voltage - Input (Max):	50V
Voltage - Output (Min/Fixed):	1.2V
Voltage - Output (Max):	24V
Current - Output:	--
Frequency - Switching:	--

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A8499SLJTR-T Application Field and Working Principle

PMIC stands for Power Management IC, and it is a voltage regulator that regulates DC/DC switching regulators. This document mainly focuses on the application and working principle of A8499SLJTR-T.

Application

The A8499SLJTR-T is a synchronous current mode flexible buck DC/DC controller. It can provide high efficiency with synchronous rectification and a minimal number of external components. This device is powered with a maximum voltage of 16V and provides the 20V and 10KHz switching frequency. This controller is widely used in a variety of applications, such as industrial automation, building control, automotive, gaming equipment, etc.

Working Principle

The A8499SLJTR-T works by lifting the voltage of an input, changing it, and then sending it to an output. This device consists of an internal error amplifier comparator, an oscillator circuit and an output driver. The internal error amplifier detects the difference between the voltage on the feedback pin and the reference voltage which is a programmed value, and the detected difference is used to adjust the output voltage accordingly.The oscillator circuit is used to generate a control signal for the output driver, which then controls the turning on and off of the output transistor. The switching of this output transistor induces a pulse onto the output, and by adjusting the pulse width, the output voltage is regulated according to the voltage reference and feedback setting.The A8499SLJTR-T is also equipped with many additional features, such as Soft Start, Over-current Protection and Thermal Shutdown. These additional features are designed to ensure the device remains stable and perform optimally in extreme operating conditions.

Conclusion

The A8499SLJTR-T is a PMIC that is specifically designed for synchronous current mode flexible buck DC/DC controllers. This device has many features, such as Soft Start, Over-current Protection and Thermal Shutdown, that make it an ideal choice for many applications that require robust power management. By understanding its application field and working principle, engineers can more easily utilize its features to create efficient and reliable power systems.

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