LM2587SX-ADJ

Voltage - Output (Min/Fixed):	1.23V
Base Part Number:	LM2587
Supplier Device Package:	DDPAK/TO-263-5
Package / Case:	TO-263-6, D²Pak (5 Leads + Tab), TO-263BA
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C (TJ)
Synchronous Rectifier:	No
Frequency - Switching:	100kHz
Current - Output:	5A (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:	Tape & Reel (TR)

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• Introduction

The LM2587SX-ADJ is a monolithic, adjustable, step-up switching voltage regulator that is designed and optimized to produce high current outputs at voltages up to 40V. The device includes an internal oscillator, fixed frequency pulse-width modulation (PWM), and operates with a wide input voltage range of 2.5V to 40V and an output voltage range of 0.8V to 42V.

• Application Field

The LM2587SX-ADJ is widely used in a variety of applications, including automotive, industrial systems, and consumer electronics:

• Automotive

The LM2587SX-ADJ is widely used in automotive applications due to its ability to deliver high current at low cost. The device is used for both starter/alternator and direct lighting applications, as well as powering various control circuits.

• Industrial

The LM2587SX-ADJ is often used in industrial systems to provide power to various components, such as motors, pumps, tooling, and lighting. The built-in current-gray feedback circuit ensures that the output voltage remains stable, even in harsh operating conditions.

• Consumer Electronics

The LM2587SX-ADJ is also commonly used in consumer electronics applications. The device is able to power a wide range of digital and analog circuits such as LCD displays, audio systems, and gaming consoles.

• Working Principle

The LM2587SX-ADJ working principle is based on the pulse-width modulation (PWM) technique. The device includes a fixed frequency oscillator and an internal comparator that monitors the output voltage.When the desired output voltage is reached, the oscillator stops switching, allowing the output voltage to remain constant. If the output voltage falls below the desired level, the oscillator will begin to switch again, increasing the output voltage until the desired level is reached.

• Conclusion

The LM2587SX-ADJ is a monolithic, adjustable, step-up switching voltage regulator that is designed and optimized to produce high current outputs at voltages up to 40V. The device can supply power for automotive, industrial and consumer electronic applications, and its fixed frequency pulse-width modulation technique ensures that the output voltage remains precise and stable.

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