SP6661EU-L/TR

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DC-DC switching regulators are essential for a variety of applications that demand reliable and efficient power conversion. The SP6661EU-L/TR is a high-performance, low-cost switching regulator from STMicroelectronics that provides a wide range of features and options for a variety of applications, including industrial, automotive, computer, and telecommunications. This paper will discuss the application field and working principles of the SP6661EU-L/TR switching regulator.

The SP6661EU-L/TR operated from a 33V input voltage, supporting a wide input voltage range of 4.75V-33V, allowing it to be used in automotive, industrial, computer and telecommunications applications. The output voltage can be adjusted between 0.8V and 38V and the output current can be adjusted up to 5A with an asynchronous buck topology. It also features an integrated 263mΩ low RDS(ON) N-channel MOSFET, providing maximum efficiency and minimum power losses in a compact solution.

The SP6661EU-L/TR features an adjustable operating frequency of 300kHz-2.2MHz, and includes built-in overvoltage protection (OVP), a dynamic voltage scaling (DVS) mode, undervoltage lockout (UVLO), output voltage tracking and soft start. It also integrates a low-noise low-dropout linear regulator (LDO) for more flexibility and low power consumption. Additionally, a synchronous rectification green-mode feature further reduces switching losses and improves overall efficiency.

The SP6661EU-L/TR also includes a current mirror drive (CMD) circuit, which allows the output current to be adjusted and monitored through an external resistor. The CMD also provides overload protection, allowing the regulator to continuously monitor the output current and shut down if necessary. The CMD circuit is highly configurable with a wide range of external components, including resistors and capacitors, allowing designers to customize the output current and voltage to their specific needs. Additionally, the SP6661EU-L/TR features an innovative integrated heat spreader, allowing the device to dissipate heat efficiently in a compact, low-cost package.

The SP6661EU-L/TR operates in 4 separate modes depending on the voltage level of the input voltage and can be configured for continuous, burst mode and skip mode operation. Continuous mode operation allows the converter to run continuously at full operation, while burst and skip mode allows the converter to vary the output power depending on the current load requirements. This allows the regulator to consume less power, saving energy and increase output efficiency.

In summary, the SP6661EU-L/TR is a high-performance, low cost switching regulator that provides a wide range of features and options for a variety of applications, including industrial, automotive, computer, and telecommunications. Its wide input voltage range, adjustable output voltage, integrated LDO linear regulator, current mirror drive (CMD) circuit, adjustable operating frequency, overvoltage protection and dynamic voltage scaling (DVS) make it an ideal choice for applications requiring reliable and efficient power conversion.

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