LM2586S-ADJ

Voltage - Output (Min/Fixed):	1.23V
Base Part Number:	LM2586
Supplier Device Package:	DDPAK/TO-263-7
Package / Case:	TO-263-8, D²Pak (7 Leads + Tab), TO-263CA
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C (TJ)
Synchronous Rectifier:	No
Frequency - Switching:	100kHz ~ 200kHz
Current - Output:	3A (Switch)
Voltage - Output (Max):	60V
Series:	SIMPLE SWITCHER®
Voltage - Input (Max):	40V
Voltage - Input (Min):	4V
Number of Outputs:	1
Output Type:	Adjustable
Topology:	Boost, Flyback, Forward Converter
Output Configuration:	Positive
Function:	Step-Up, Step-Up/Step-Down
Part Status:	Not For New Designs
Packaging:	Tube

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LM2586S-ADJ Application Field and Working Principle

The LM2586S-ADJ is a DC-DC buck-boost switching regulator, and is part of a wider family of voltage regulators. In this article, we will examine the application field and working principle of the LM2586S-ADJ and how it fits into the broader category of the Voltage Regulators – DC-DC Switching Regulators.

Application Field

The LM2586S-ADJ, being a switching regulator, is used to regulate the input voltage, regardless of whether it is above or below the desired output voltage, thus making it suitable for a number of applications requiring a stable output voltage. Besides the capability of buck and boost, it is also capable of operating in both continuous and discontinuous conduction modes.Due its low input voltage range, making it suitable for low voltage sources, the LM2586S-ADJ is perfect for a variety of applications requiring a regulated input voltage. These applications include powering DC motors, powering LEDs, battery-charging, energy metering and power conditioning.The versatility of the LM2586S-ADJ also allows it to be used in a variety of situations, including running on an automotive power supply, wireless power sources and renewable energy sources. Overall, the LM2586S-ADJ is well-suited for applications requiring a regulated input voltage, under either buck or boost conditions.

Working Principle

The LM2586S-ADJ voltage regulator performs voltage regulation by controlling the time a switch is open and closed, to allow current to pass from the input power supply to the output. This technique also serves to maintain an input/output voltage ration of around 1:1, thus allowing for efficient voltage regulation.At the heart of the LM2586S-ADJ is a PWM (pulse width modulation) circuit. This circuit is responsible for switching the current on and off at certain intervals, to regulate the input voltage. The frequency of the pulsing is set by the input voltage, while the duty cycle is set by the output voltage. The Duty Cycle, once changed, also affects the output current, as well as the input/output voltage ratio, allowing for greater or lesser output voltage. The LM2586S-ADJ also features protection against over-current, over-temperature and over-voltage conditions. This protection is provided by using a voltage limit detector, a current limit amplifier and a thermal shutdown circuit.

Conclusion

The LM2586S-ADJ is a DC-DC buck-boost switching regulator, part of the wider voltage regulators – DC-DC switching regulators family. This voltage regulator is suited for a variety of applications, including powering DC motors, powering LEDs, battery-charging, energy metering and power conditioning. At its core, the LM2586S-ADJ employs a PWM (pulse width modulation) circuit to regulate the input voltage, by switching the current on and off at certain intervals, while also maintaining an input/output voltage ratio around 1:1.The LM2586S-ADJ also features protection against over-current, over-temperature and over-voltage conditions, making it an ideal choice for applications of voltage regulation.

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