LM2593HVT-3.3

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LM2593HVT-3.3 is a type of DC-DC switching regulator in the Power Management Integrated Circuit (PMIC), Voltage Regulators category. It has low power consumption and a wide input voltage range, making it an ideal choice for various conversion applications. This article will discuss the application field and working principle of the LM2593HVT-3.3.

The LM2593HVT-3.3 is a cost-effective, space-saving monolithic integrated circuit (IC). It is specifically designed as an economical solution for voltage regulation and post-regulation requirements. Its wide input voltage range (36V to 70V) and low quiescent current draw (0.15mA typ. at no load) make it highly suitable for various applications, such as systems that require high efficiency, highly regulated current output, and low quiescent current draw.

In terms of application field, the LM2593HVT-3.3 can be used in automotive lighting, industrial motor control, and motor power systems. It is designed for boosted, buck, or SEPIC topologies and can be used to generate regulated output voltages in the range of one to thirty-three volts. Its wide input voltage range and low quiescent current draw make it perfect for applications that require a high level of efficiency and accuracy.

The LM2593HVT-3.3 also features two frequency modes, low and high. The low frequency mode has a nominal range of 500kHz to 2.5MHz, while the high frequency mode has a nominal range of 3MHz to 16MHz. The operating temperature range of the device is -40°C to 85°C. It is important to note that the device is designed for systems with a minimum load of 5mA and is not suitable for applications that require greater load currents.

In terms of working principle, the LM2593HVT-3.3 is composed of a voltage reference, an error amplifier, an oscillator, and a voltage feedback loop. The first step of the process is to select the desired output voltage. Once the desired output voltage is set, the device then compares the output voltage to a low-impedance voltage reference. The error amplifier monitors the voltage difference and adjusts the current-mode controller’s ‘ON time’ based on the error voltage. High or low frequency switching is then enabled by setting the OSCF pin to the high or low frequency mode.

The controller then uses a current-mode control loop, which keeps the output current at the desired value. As the load current changes, the controller adjusts the ‘ON time’ of the switch to keep the output current stable. This ensures efficient transfer of power with minimum losses. The current-mode control also ensures a tight regulation of voltage and current as the output voltage is directly proportional to the load current.

The LM2593HVT-3.3 is a high-efficiency, cost-effective, and space-saving solution for post-regulation and voltage control applications. Its wide input voltage range, low quiescent current, and two frequency modes make it suitable for a wide range of applications. With its current-mode control loop, the device is able to efficiently transfer power with minimum losses and maintain stability under varying load conditions.

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