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PMIC - Voltage Regulators - DC DC Switching Regulators

EL7516IY application field and working principle

The EL7516IY is a high efficiency, high power DC/DC synchronous step-down switching regulator designed to operate from an input voltage range of 3.3V to 35V and provide a programmable output current up to 1.5A. It is designed to operate with an output voltage range of 0.8V to 10V and a switching frequency of 2000kHz that makes it lower in external component count.

This device is ideal for applications such as networking and telecom, consumer electronics, automotive and general-purpose DC/DC applications as well as for point of load (POL) applications. It features a 30V internal power MOSFET, precision enable control, enable synchronization, programmable soft-start, power good signal, enable at power up and adjustable voltage/current trip points. In addition, the EL7516IY includes a power save mode for low dropout applications, internal soft start, over current protection and a fold back current limiting to increase the effective current of the IC whenever an accidental overload occurs.

The EL7516IY has a leading edge MOSFET that allows a wide operating temperature range of -40 degree Celsius to +125 degree Celsius. The device can be operated in pulse width modulation (PWM), spread spectrum or pulse frequency modulation (PFM) modes depending on the application and output voltage requirements. The EL7516IY can also be configured to operate in a non-isolated mode to maintain a steady output voltage or in an isolated mode to provide greater efficiency and switching noise reduction.

The working principle behind the EL7516IY is to convert a high input voltage to a lower output voltage while still providing a constant current to the load. A comparator circuit compares the feedback voltage from the output to an internal reference and adjusts the gate voltage of the MOSFET accordingly, to maintain a constant output voltage. The efficiency of the device is improved by using a low gate resistence MOSFET and an optimized inductor design to reduce the switching losses.

The EL7516IY is capable of providing a programmable output current up to 1.5A and features a wide input voltage range from 3.3V to 35V. The output voltage range is adjustable from 0.8V to 10V, allowing for a vast number of applications. The device also supports all the necessary protection features such as over temperature, over current and over voltage protection, enabling use in critical applications. In addition, the EL7516IY also features a power good monitor to ensure that the device starts correctly and that the current protection circuit functions correctly.

The EL7516IY is an ideal choice for applications that require high efficiency, high power rating and high switching frequency. The device is designed to operate with a switching frequency up to 2000kHz, which makes it lower in external component count and helps to reduce the cost and system size. The wide input voltage range and adjustable output voltage feature make this device suitable for use in a variety of different applications.

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