SP7655ER-L

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The SP7655ER-L is a DC-DC switching regulator from STMicroelectronics and is a member of the STSwitches series. DC-DC switching regulators are a type of voltage regulating device, known as power management ICs (PMICs), which convert an input DC voltage to an output DC voltage by controlling the power drawn from the power supply.

Advantages of using a switching regulator at the design stage include efficiency, compact form factor, and flexibility. In particular, this DC-DC switch regulator has a very low output ripple and is capable of switching at high frequencies, resulting in low noise, low EMI and reduced electromagnetic interference.

This device has a wide range of input voltage, 3.2 V to 5.5 V, and a wide output range, 1.8 V to 5.1 V. It has an adjustable switch frequency which can be set as low as 250 kHz and as high as 2 MHz, depending on the requirements in a given application. Furthermore, it has an internal temperature sensor which provides over-temperature protection and a unique current sense circuit which ensures the peak switch current remains constant.

It is widely used for a variety of applications such as industrial and consumer electronics, automotive, mobile phones, portable media players, and gaming consoles. The SP7655ER-L is ideal for powering on-chip CPUs, GPUs, FPGAs, as well as other low power components.

The working principle of the SP7655ER-L is based on the pulse width modulation (PWM) technique. It works by switching the output voltage in a ratio with the input voltage. With a given DC voltage, the output voltage is regulated by varying the on-time of the outputs (internally termed Soft-Start) and the off-times of the output pulses. In this way, a higher voltage is supplied at the beginning of an on-time where the switch transistor is on, and then the output voltage slowly drops until the off-time arrives, and the process is repeated in order to keep the output voltage at a constant level.

Power MOSFETs are used internally to drive the output, while a low dropout voltage regulator and a voltage reference circuit is used to generate the control voltages. Moreover, a feedback loop is used to ensure that the output voltage remains at its desired value.

In summary, the SP7655ER-L is a high performance and versatile DC-DC switching regulator from STMicroelectronics. It is suitable for a range of applications including industrial and consumer electronics, automotive, mobile phones and other portable electronics. Its operating principle is based on PWM and it uses an internal feedback loop and temperature sensor to ensure its performance stability over time.

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