AUR9705AGH

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The AUR9705AGH is a low voltage DC/DC buck switching regulator designed to deliver up to 1.5A of continuous current to a low voltage load. It is part of the AUR970X series family of DC/DC switching regulators, specifically designed for applications where power consumption must be maximized while down-converting an input voltage within a certain range. It is an integrated solution with an efficiency of over 95%, 4kV surge protection and high transient immunity, making it ideal for applications in powering low voltage circuits from a battery, as well as when voltage is down-converted for applications such as motor control, telecom, automotive and metering.

The AUR9705AGH is a single-channel DC/DC switching regulator featuring a ‘constant on-time’ control scheme, with a programmable voltage regulation setting, adjustable switching frequency, loop compensation and many features to optimize performance. It requires few external components, allowing for a minimal design due to its integrated soft-start, thermal protection and overvoltage protection.

The energy savings capabilities of the AUR9705AGH are of great interest to engineers in application that require heavy power consumption. The supply current is kept low by reducing the operating frequency at light loading conditions, thus reducing losses. It also utilizes a ‘burst mode operation’ for reducing the output voltage ripple, minimizing the output noise. It also includes programmable under-voltage lockouts (UVLO) and system level protection features to improve overall system reliability.

The AUR9705AGH can deliver up to 1.5A of continuous output current, with an adjustable output voltage of 0.75V to 5.5V. With its low quiescent current and adjustable switching frequency, it is suitable for many applications where efficiency and optimal output ripple noise is of importance. It also has excellent transient suppression, surge immunity and peak transient current capability along with single fault protection.

The AUR9705AGH implements a ‘constant on-time’ control scheme, in which the current mode waveform is generated by controlling the on-time based on an integrated high-side switch current sense. The output voltage is regulated by controlling duty cycle of the high-side switch. The switch current is monitored by the control loop and regulates the duty cycle to maintain the output voltage.

The device also includes a 4kV surge protection along with a programmable UVLO setting, programmable system level protections including fault protection, thermal protection and overvoltage protection. Additionally, the device is also integrated with a fast, adjustable soft-start to lower inrush current for proper system startup.

The AUR9705AGH is an extremely power efficient, low voltage DC/DC buck regulator that is ideal for powering a wide range of low voltage systems. Its adjustable switching frequency and low quiescent current enable designers to optimize their system performance while maximizing power savings. It is particularly suited for applications in which a very low voltage is needed, such as motor control, telecom and automotive applications. The integrated surge protection, fault protection and programmable UVLO set-up make it suitable for any environment where reliability is a top priority.

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