LM2585S-5.0

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The LM2585S-5.0 is a high efficiency monolithic switching step-down regulator that can accurately provide a regulated output voltage up to 5V with a wide 4.5V to 36V input voltage range. It is part of a family of Step-Down Regulators available in fixed 5V, adjustable and low dropout versions, making it suitable for a wide range of applications. It is specifically designed as a general purpose voltage regulator that can be used to power a wide variety of electronic circuits and devices, and it is ideal for high efficiency power conversion in portable equipment, automotive applications and other low voltage systems.

The LM2585S-5.0 differs from other Step-Down Regulators in that it can deliver up to 3A of output current with a high efficiency rating of 87%. It also has a low quiescent current draw and standby current draw of 4mA, making it suitable for use in low power supplies. It is also designed for low output ripple, making it suitable for powering sensitive and high impedance loads.

The LM2585S-5.0 operates by taking in an input voltage from the supply voltage, regulated by an internal adjustable voltage regulator and then uses the switched output drive circuit to provide the desired output voltage. The step-down switching regulator uses a PWM or Pulse Width Modulation technique to control the amount of current coming from the supply. The PWM signal is generated by an external control circuitry, typically an oscillator, that is connected to the regulator’s Enable pin. The oscillator frequency is adjustable, which allows the user to control the output voltage as desired. Once the regulator is enabled, the oscillator output is converted into a high frequency pulse train by the PWM comparator and then used to drive the switching power transistor.

The regulator also features a variety of protective features such as short-circuit protection, over-voltage protection, and output voltage adjustment capability. The short-circuit protection allows the LM2585S-5.0 to shut down and then recover from a short circuit event, protecting the regulator and the interfaced circuits from damage. The over-voltage protection feature prevents the regulator from operating beyond its design limit, thus protecting the system from excessively high output voltages. The output voltage adjustment feature allows the user to adjust the output voltage from 5V to 36V and is useful for applications where an exact amount is required.

In summary, the LM2585S-5.0 is a high efficiency monolithic switching step-down regulator suitable for a wide range of applications, including portable equipment, automotive applications and other low voltage systems. It offers high efficiency, low quiescent current draw, low ripple and a variety of protective features, making it a great choice for powering sensitive and high impedance loads.

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