LV5068V-MPB-H

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PMIC - Voltage Regulators - DC DC Switching Controllers

LV5068V-MPB-H is a DC DC switching controller for multiple applications, especially for the DC-DC converter. It can operate in PWM mode with a high-frequency operation from 500KHz to 1MHz. Its on-chip comparators provide an instantaneous feedback for an accurate measurement of input voltage and output current. The LV5068V-MPB-H also features constant frequency current mode (CFCM) control for regulating and switching a wide range of output voltages.

Application Field

The main application fields of LV5068V-MPB-H are mobile, tablet and notebook computers, multi-voltage microprocessors, automotive electronics and other fixed-voltage applications. LV5068V-MPB-H integrates the necessary features for efficient operation. It offers high efficiency and low EMI performance.

LV5068V-MPB-H can be used in multiple applications, such as:

• Li-Ion battery-powered mobile phones and tablets
• Processors with multiple voltage supply rails
• Automotive electronics
• E-cigarettes and battery packs
• Smartphone and notebook chargers
• Wireless charging applications
• Point-of-Loads, POE and PFC applications

Working Principle

LV5068V-MPB-H is based on constant frequency, current mode control with an adjustable peak current of 1A. It combines a high performance instability and non-overlapping control. Internal circuitry eliminates the need for external compensation for most applications. Its 1A peak current is regulated by the voltage at the CTRL pin, which is monitored using a pair of internal comparators.

The switching frequency of LV5068V-MPB-H can be adjusted through an external resistor connected to the FREQ pin, for the purpose of choosing a good compromise between performance, solution size and cost. The FREQ pin also integrates frequency synchronization. The external resistor enables the device to generate a PWM signal out of the OCP pin to drive other peripherals.

The LV5068V-MPB-H allows the operation of buck converters in fixed frequency, current-mode control. This operation eliminates the requirement for bulky input and output bulk capacitors. In addition, having a programmable error amplifier and overload protection, the LV5068V-MPB-H reduces design effort, component count and the cost of the DC-DC converter.

The LV5068V-MPB-H also features overvoltage protection and short-circuit protection. It has a high-side MOSFET gate drive voltage that is adjustable from 1V to 25V. The LV5068V-MPB-H is also capable of working in low operating voltages, with a low overshoot current mode.

Conclusion

The LV5068V-MPB-H is an advanced DC-DC switching controller with high performance, high efficiency and low EMI performance. It is suitable for multiple applications, such as smart phones, tablets computers, automotive electronics, e-cigarettes and battery packs, smartphone and notebook chargers, wireless charging applications, and point-of-loads, POE and PFC applications. It operates in constant frequency, current mode control, with a peak current of 1 A, adjustable frequency and adjustable gate drive voltage. It also offers overvoltage protection and a low overshoot current mode.

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