ISL9012IRNNZ

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ISL9012IRNNZ Application Field and Working Principle

The ISL9012IRNNZ is a high performance, low cost, dual-mode current mode synchronous buck controller with integrated 3A NMOS and 1A PMOS MOSFETs. It is designed to deliver high output current and excellent load and line regulation with low quiescent current. It helps to reduce the number of external components, simplifying the system design whilst improving the efficiency and functionality of the circuit.

The ISL9012IRNNZ is suitable for many different applications such as portable computing, industrial, green energy, low-power and automotive markets. It is also ideal for non-isolated point-of-load (POL) applications, where the needs for multiple output voltages for different components as well as short-term over-voltage protection are required. The ISL9012IRNNZ is the perfect choice for such applications.

ISL9012IRNNZ Features and Benefits

• Wide VIN and VOUT range up to 24V
• Integrated 3A NMOS and 1A PMOS FETs
• Dual operation mode – pulse-skip modulation (PSM) and force pulse width modulation (FPWM)
• Real-time adjustable power stage resistors
• High output current up to 3A
• High line and load regulation
• Low quiescent current
• Current sense resistor optional
• Soft-start/stop
• Voltage readback for output voltage trim
• OE pin for output power control
• Tight load and line regulation
• AP Protocol interface for control and monitoring
• Enhanced overvoltage protection (HVLO) to prevent damage in hot-plugging applications
• Thermal shutdown and over current protection

ISL9012IRNNZ Working Principle

The ISL9012IRNNZ utilizes current mode control to regulate the output voltage. It is a dual mode device with both the Pulse Skip Mode (PSM) and Force Pulse Width Modulation (FPWM) mode selectable. In PSM mode, the device runs in pulse skip mode when the load current is less than the threshold, which results in high efficiency and low EMI noise under light and moderate load conditions, as the converters switch at lower frequency and duty cycle.

In FPWM mode, it is an architecture optimized for high power operation with synchronous rectification, minimizing conduction losses and maximizing efficiency. The device has an adjustable power stage with the external device resistances that allows the user to fine-tune the modulation, allowing the converter to be more precisely adjusted to the application and improving reliability and efficiency.

The ISL9012IRNNZ also has additional protection built-in. It has an OVLO (High Voltage Lockout) feature that protects the device from voltage spikes, allowing it to be used in hot plug applications. It also has over-current, thermal shutdown, and soft start protection.

Conclusion

The ISL9012IRNNZ is a high performance, low cost, dual-mode current mode synchronous buck controller with integrated 3A NMOS and 1A PMOS MOSFETs. It is ideal for many different applications such as portable computing, industrial, green energy, low-power, and automotive markets. It has wide input and output range, dual operating modes, adjustable power stage, enhanced protection features, and current sense resistors. The ISL9012IRNNZ is best suited for non-isolated POL applications where multiple output voltages and short-term over-voltage protection are critically important.

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