MAX765EPA

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Introduction

The MAX765EPA is a high power switching voltage regulator IC developed by Maxim Integrated Corporation. It is designed to provide regulated output voltage and current levels in a wide range of applications. This device is designed to replace a variety of off-the-shelf (or discrete) PWM converters and associated power supply components.

Application Field

The MAX765EPA is a DC-to-DC switching regulator that offers a wide range of features and flexibility. It can be used in many applications, from telecom equipment and mobile phones, to embedded systems in automotive, industrial and computer equipment, and to aerospace and military systems. With its high input/output voltage range and its low standby current consumption, the MAX765EPA is able to provide up to 1.8A of continuous output current with excellent line and load regulation. The device is suitable for 3V to 20V input and output voltage ranges.

For many system designs, external components are required for the MAX765EPA. To simplify the system design, the device integrates on-chip circuit components including a power switch and PFM feedback circuitry. This reduces the number of external components, simplifies system design, and reduces power supply design time.

Working Principle

The MAX765EPA is a DC-to-DC switch mode power supply controller integrated circuit. The device uses pulse-width modulation (PWM) control to regulate the output voltage while providing low output ripple, tight line and load regulation, and excellent dynamic response. The device also offers electronic current limit circuitry, output disconnect, and thermal shutdown protection.

The MAX765EPA is designed to provide up to 1.8A of continuous output current and typically operates at a frequency of 150kHz. The device requires few external components, as many components are integrated into the IC itself, such as a power switch, a PFM feedback circuitry, and a resistor divider network for setting the output voltage.

The MAX765EPA provides current-mode control, which effectively tracks a single-pole low-pass filter, providing better line and load regulation than voltage-mode control. The cycle-by-cycle current limit protection and hiccup-mode over-current protection offer over-current protection for the device. The output disconnect feature shuts off the power switch when either the output current falls below the set limit or the output voltage reaches the upper or lower limit.

The temperature shutdown feature protects the device from excessive power dissipation. The device also has soft start circuitry that smoothly transitions from standby to operating mode. The MAX765EPA also includes a power feedback pin, which provides feedback for power-good indicators. It also provides a programmable rising/falling ramp response for precision timing.

Conclusion

The MAX765EPA is a 3V to 20V high power switching voltage regulator IC designed by Maxim Integrated Corporation to provide regulated output voltage and current levels. The device is suitable for a wide range of applications, setting it apart from other devices. The integrated features such as the power switch, PFM feedback circuitry, and resistor divider zetwork offer a compact design and simplify system design. The current-mode control and the over-current protection features, along with the temperature shutdown feature and soft start circuitry, are all integrated into the device as a protection measure. These features make the MAX765EPA an ideal choice for various high power switching voltage regulator applications.

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