LM2587S-5.0/NOPB

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PMIC - Voltage Regulators - DC DC Switching Regulators

The LM2587S-5.0/NOPB is part of Texas Instrument’s Regulator operation Integrated Circuit (IC) series. It is an Adjustable 3A Step Down Voltage Regulator that provides constant volts output ranging from 1.23V to 37V, with a high operating temperature of up to 125 degrees Celsius. The device has a peak operating frequency of 1.2MHz and is rated for an output current of 3A, which makes it suitable for a range of applications.

Application Fields

The LM2587S-5.0/NOPB is well suited for applications in which an adjustable, 3A output is required. This includes:

• Processing power supplies
• Distributed power systems
• Power manage DC/DC converters
• Phase-Locked-Loop (PLL) power supply
• 5V medical device power supplies
• 3.3V to 12V DC/DC converters

Features

The LM2587S-5.0/NOPB features some advanced features that make it suitable for a range of applications. These features include:

• Adjustable output voltage
• High output current
• High operating temperature.
• Zero power loss at low duty cycles, providing improved efficiency.
• Operation up to 1.2MHz, at 1.5 to 18V input.
• Multiple output voltage levels in the range of 0.8V to 6V.
• Integrated start-up and protection features.

Working Principle

The LM2587S-5.0/NOPB is a Step-Down DC/DC converter and works on the principle of Pulse Width Modulation (PWM) that implements a voltage regulation loop for output stability. In this circuit, the input voltage is reduced to an output voltage that is lower than the input voltage through a combination of a inductor, a capacitor, and multiple MOSFET transistors. The switching of the MOSFETs is regulated by PWM, which is provided by an external voltage reference and an onboard error amplifier. This type of topology is commonly used in converters, power supplies, and other DC/DC applications.

The LM2587S-5.0/NOPB is designed to be used as either a current-mode or voltage-mode switch-mode regulator. It is capable of producing outputs ranging from 0.8V up to 6V. The maximum output current is 3A, and the operating temperature range is from -40°C to 125°C. The device has advanced protection features, such as over-voltage, under-voltage, and thermal protection. Additionally, it has a built-in soft-start feature to help prevent excessive inrush currents when the device is powered up.

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