LM53603AMPWPT

Voltage - Input (Max):	36V
Supplier Device Package:	16-HTSSOP
Package / Case:	16-TSSOP (0.173", 4.40mm Width) Exposed Pad
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C (TJ)
Synchronous Rectifier:	Yes
Frequency - Switching:	2.1MHz
Current - Output:	3A
Voltage - Output (Max):	10V
Voltage - Output (Min/Fixed):	3.3V
Series:	Automotive, AEC-Q100
Voltage - Input (Min):	3.9V
Number of Outputs:	1
Output Type:	Adjustable
Topology:	Buck
Output Configuration:	Positive
Function:	Step-Down
Part Status:	Active
Packaging:	Tape & Reel (TR)

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LM53603AMPWPT Application Field and Working Principle

The LM53603AMPWPT is a synchronous Buck DC-DC switching regulator from Texas Instruments. It is designed for advanced microprocessors, memory, and other integrated circuits. It belongs to the PMIC (Power Management Integrated Circuit) category, in particular to the Voltage Regulators family, and more specifically to the DC-DC Switching Regulators mode.The LM53603AMPWPT switching regulator provides up to 4A of output current and uses a unique architecture to achieve up to 95% efficiency at light load conditions. Its low-side switch is integrated, and its high-side switch is external (Lx technology). Also, its switching frequency is adjustable (up to 2.2 MHz) and internally set to 800 kHz, allowing the user to select the best trade-off between component size, efficiency and performance.The device is specifically designed for advanced microprocessor, memory and other integrated circuits. It incorporates a Bootstrap circuit for the high-side switch, that simplifies external component requirements. Also, the integrated circuit contains other features such as soft start, low quiescent current and integrated over-current protection.The LM53603AMPWPT provides a high-efficiency solution with low-side integrated switch, adjustable switching frequency and multiple protection features. It works by synchronizing its operations with the output inductor current of the buck controller. It is capable of operating in both continuous and discontinuous conduction modes.In continuous conduction mode, the inductor current is kept constant. This means that the device is able to supply a constant or near-constant output voltage even with changes in load current and input voltage. The switch-mode operation of the device reduces power losses, resulting in a significant improvement in overall efficiency.In discontinuous conduction mode, the inductor current is not constant but varies depending on the load current. This results in significant savings in power losses and improved overall efficiency.The device supports input voltage ranges up to 10.8V and has an output voltage range of 0.6V-VIN. It provides ultra-low quiescent current, allowing it to operate at very low power levels. Moreover, the device integrates soft start and over-current protection (OCP) features to protect it against damage due to over-current and short-circuit conditions.In summary, the LM53603AMPWPT switch-mode DC-DC regulator is a highly efficient, high-performance solution for advanced microprocessor, memory and other integrated circuits. It is specially designed to provide low-side switch-mode operation with adjustable switching frequency, adjustable output voltage range and dynamic load regulation. Its unique architecture, combined with its multiple protection features, makes it ideal for a wide range of power management applications.

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