LM5119QPSQX/NOPB

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The LM5119QPSQX/NOPB is a peak current mode controller with integrated MOSFET driver in a DFN package, designed for high power density board space applications in a Point-of-Load circuit. The device has voltage feed-forward for improved response in load transients. The LM5119QPSQX/NOPB is designed to support both step-down (buck) and step-up (boost) operating configurations.

The LM5119QPSQX/NOPB accepts input voltage from one to nine volts and can be used to generate output voltages from 0.8 to 5.2V for fixed or adjustable output. Its integrated pulse-width-modulation (PWM) feature helps reduce input ripple current and circuit complexity, combining an input voltage regulator, current sensing amplifier, and output drive stage in one package. Other features include frequency jittering, soft start, low quiescent current, adjustable dead time, and over current and over volt protection.

The maximum operating frequency range of the LM5119QPSQX/NOPB is from 250kHz to 1MHz. The duty cycle range of this device is between 0.5% and 99.5%. The external components used in the PCB are minimized since the user can adjust the output voltage using only two resistors.

The LM5119QPSQX/NOPB has a separate output voltage sense port, which helps in providing a feedback signal for the power control loop. This type of feedback is used to actively regulate the system in order to keep the output voltage constant despite load, line, or temperature variations. In addition, the device has a non-inverting Over Voltage Protection (OVP) feature, which helps to protect the device from over voltages.

The LM5119QPSQX/NOPB can be used in High Brightness LED applications. The advantage of this device is that it provides high efficiency, integrated MOSFET driver and PWM controller and allows simple LED dimming. It also offers short circuit, over temperature, and open LED protection. With adjustable frequency, the LM5119QPSQX/NOPB can be easily configured to reduce EMI by reducing the switching frequency and ensuring that it lies in the low emission range.

The LM5119QPSQX/NOPB is also useful in battery charger applications, where it provides high current with low quiescent current and low switching frequency. This device is an ideal choice for applications requiring high efficiency. By using the LM5119QPSQX/NOPB as a constant current source, the battery can be charged with improved efficiency, lower component counts, and smaller board space.

The LM5119QPSQX/NOPB is suitable for portable equipment, charger and battery powered equipment, automotive electronics, telecom power supply and computers/workstation systems. This device helps to increase system efficiency and reliability while reducing component count and cost.

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