L7980ATR

Voltage - Output (Min/Fixed):	0.6V
Base Part Number:	L7980
Supplier Device Package:	8-HSOP
Package / Case:	8-SOIC (0.154", 3.90mm Width) Exposed Pad
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 150°C (TJ)
Synchronous Rectifier:	No
Frequency - Switching:	250kHz ~ 1MHz
Current - Output:	2A
Voltage - Output (Max):	28V
Series:	--
Voltage - Input (Max):	28V
Voltage - Input (Min):	4.5V
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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L7980ATR Application Field and Working Principle

Introduction to DC DC Switching Regulators

DC/DC switching regulators enable users to use a wide range of input voltage sources to provide a steady-state DC output voltage. Instead of controlling the transistor’s gate drive to regulate the output voltage, the output voltage is directly controlled with a DC voltage reference.Modern switching regulators reside in the power management IC (PMIC) realm. A PMIC is a device containing control loops, power regulation circuitry, sensors, and other power-management functions such as I/O voltage level shifting, ADC/DAC converters, and backup/retention functions. PMICs, in many cases, use proprietary algorithms to efficiently manage energy consumption, limit heat dissipation and reduce noise created by the power circuits, whilst giving accuracy and stability to the output voltage.

Highlighting the L7980ATR

The L7980ATR is an example of an advanced switching regulator offering all the features of a polyphase buck-boost synchronous DC-DC converter, a PFC boost converter, and a DC-DC linear regulator in a single integrated package. The device is a high efficiency 1-14v buck-boost synchronous converter, delivering up to 3 A output current with up to 90 % efficiency, suitable for a wide range of applications. It also has multiple integrated power devices offering safe operation with true RDS(ON) power limiting and short circuit protection. With its many different features, it is suitable for automotive, industrial, and consumer applications. The device comes in two varieties, one with an adjustable output and one with a fixed output voltage. The adjustable version allows the output voltage to be accurately adjusted, while the fixed version has a preset output.

Working Principle and Applications

The L7980ATR provides a variety of protection and performance characteristics for a wide range of applications. It functions by using a switching regulator to convert a higher input voltage to a lower desired output voltage. This is achieved by driving switches connected between the input and output sides.The switching frequency allows the device to inherently have short-circuit protection and thermal protection (TSD) as well as on-chip voltage loop control.The switching frequency is programmable with Internal Clock, Voltage Mode (VM), or Pulse Frequency Modulation Control. The L7980ATR is suitable for a broad range of applications, including automotive power supplies, laptop power supplies, industrial equipment, telecom applications, and other DC-DC conversion needs. Its various features, such as voltage and current limits and adjustable soft-start, two non-overlapping gate drive signals, over-voltage protection, and low ESR capacitor requirements, make it well suited for these applications.

Conclusion

The L7980ATR is an advanced switching regulator that offers an efficient solution to reduce application space and simplify design. With its wide range of features and multiple safety and control configurations, it is suitable for a variety of power supplies and conversion needs, making it an excellent choice for automotive, industrial, and consumer applications.

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