L5989DTR

Voltage - Output (Min/Fixed):	0.6V
Base Part Number:	L5989
Supplier Device Package:	16-HTSSOP
Package / Case:	16-TSSOP (0.173", 4.40mm Width) Exposed Pad
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 150°C (TJ)
Synchronous Rectifier:	Yes
Frequency - Switching:	100kHz ~ 1MHz
Current - Output:	4A
Voltage - Output (Max):	18V
Series:	--
Voltage - Input (Max):	18V
Voltage - Input (Min):	2.9V
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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L5989DTR Application Field and Working Principle

PMIC - Voltage Regulators - DC DC Switching Regulators are commonly used in a wide range of applications due to their top-notch performance and safety features. The L5989DTR is the ultimate choice in such applications. This device features a wide range of features including wide input voltage range, high efficiency, low power consumption, and small size.The L5989DTR is a low-noise, point-of-load switching regulator for embedded applications. It supports wide input voltage range from 4.5 V to 28 V and has an adjustable output voltage from 0.6 V to 6 V. It is optimized for low-noise, high-efficiency point-of-load regulation in embedded systems. The L5989DTR is highly-integrated and features a high-density multi-phase circuit capable of delivering up to 6 Amps of load current with very-low ripple noise.The main application fields of the L5989DTR include input voltage regulation for low-power embedded microcontrollers and system monitors, high current point-of-load (POL) regulation for microprocessors, FPGAs, and ASICs, on-board point-of-load regulation for battery powered systems, and core voltage regulation for embedded systems.The working principle of the L5989DTR is based on the principles of switched-mode power supplies (SMPS) and pulse width modulation (PWM). SMPSs convert a given DC voltage to a variable DC voltage through an inductor-capacitor (LC) circuit and a regulated power switch. The input voltage is chopped in ON and OFF states using the switch and the voltage at the output is regulated by controlling the ON time ratio. The PWM technique is used to further refine the output voltage regulation.The L5989DTR uses a high-speed current-mode PWM control that results in faster transient response and better noise immunity, thus providing more accurate and reliable output voltage regulation. The device is resistant to load and line transient, which makes it suitable for switching applications. In order to minimize external components, the L5989DTR features a high-efficiency synchronous rectification and internal power transistor, allowing for a complete application with few additional components.The L5989DTR also includes advanced protection functions such as over-temperature protection, overload protection, short-circuit protection, and over-voltage protection that safeguards the system from power supply collapses and other damage.In conclusion, the L5989DTR is an ideal choice for DC DC switching regulator applications that require low-noise, high-efficiency, point-of-load regulation. The device is highly efficient, cost-effective and easy to use. It offers a range of advanced protection and control features, making it a great choice for a variety of embedded applications.

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