FAN53528EUC48X Datasheet/PDFDue to the fast growing demand for advanced electronic devices with high efficiency and very good reliability, the market for DC–DC switching voltage regulators has also expanded rapidly. This market involves Application Specific Integrated Circuit (ASIC) applications, and the FAN53528EUC48X falls into this category. It is a DC–DC synchronous buck controller designed for battery operated applications. This article will explore the FAN53528EUC48X application field and working principle.
Application field of FAN53528EUC48X
The FAN53528EUC48X belongs to Monolithic Power Systems (MPS) – specialist in intergrated power and analog ICs. It is a synchronous step-down DC–DC converter, suitable for industrial , automotive, and personal systems. The device integrates an internal high-side and low-side MOSFETs at high efficiency levels, and also minimizes EMI noise. It is designed for mobile phone, tablet and other small electronics applications. Its main features are listed below.
- Input voltage capability of up to 36V
- Output Accuracy of +/-1%
- Up to 95% efficiency
- 0.15V reference voltage
- PWM frequency of 2.5MHz
The FAN53528EUC48X is optimized for high efficiency over a wide range of load currents. It is also suitable for applications with input voltage and output current up to 5A. In addition, the device has three operating modes: Forced PWM mode, Low-Voltage Sync FI mode and Low-Voltage PFM mode. This integrated DC–DC converter is resistant to thermal and over-voltage stress.
Working principle of FAN53528EUC48X
The FAN53528EUC48X operating principle is based on a synchronous buck converter. A buck converter is a DC – DC converter, which is used to step down the source voltage. This device is controlled by a PWM signal, which switches on and off an internal high-side and low-side MOSFETs to provide the output voltage. The amount of energy transferred from the input to the output is dictated by the on-time duty cycle of the switching transistors and the inductor value.
When the switching duty cycle is at 0%, the input voltage is routed to the output. During the on-time, the source voltage is transferred to the output through a synchronous buck converter. The current waveform between the input and the output is sinusoidal and the ripple voltage on the output is minimal. The output voltage is regulated by varying the switching duty cycle to maintain a constant output. The FAN53528EUC48X also includes a voltage-mode control loop that uses feedback to compare the output voltage with the reference voltage.
Conclusion
In conclusion, the FAN53528EUC48X DC–DC switching voltage regulator has a wide range of applications and is suitable for low power applications. It is an integrated DC–DC converter, with integrated high-side and low-side MOSFETs. The FAN53528EUC48X principle is based on a synchronous buck converter, which has very good efficiency, accuracy, and minimal ripple voltage. In addition, it is resistant to thermal and over-voltage stress.