LM2593HVSX-3.3

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Integrated circuit (IC) voltage regulator, also known as voltage regulator, can be used to provide stable voltage, output voltage and control current. Voltage regulator generally has a regulating range, and its output voltage is not related to the input voltage. LM2593HVSX-3.3 is the high efficient synchronous buck regulator on the market designed by ON Semiconductor. It is featured with low input voltage, low ripple noise, low EMI, current limit, thermal shutdown, input range under-voltage lockout and soft start.

1. LM2593HVSX-3.3 Application Field

LM2593HVSX-3.3 has wide input voltage ranging from 4.5V to 42V and the adjustable output voltage range is 1.23 V–36V and current can reach 5A for a fixed output voltage, or up to 30A for adjustable output voltage. This chip does not generate inrush current, provide a high efficiency, offer a precise current and voltage regulation, improve the power efficiency of the system, and contribute to a wide application field.

The LM2593HVSX-3.3 can be widely used in the application of smart terminals, consumer electronic products, netbooks, tablets, GPS, power level communication equipment and other battery-supply systems. And in the consumer electronics fields, this chip is designed for such applications as car charging POE, LCD/LED displays, gaming platforms and portable peripherals. Moreover, in the industrial field, it can also be used to power mobile robots, gateways and remote intelligence systems.

2. Working Principle of LM2593HVSX-3.3

The LM2593HVSX-3.3 is a high efficient monolithic synchronous buck regulator with integrated power MOSFET. It includes a voltage reference, oscillator, error amplifier, thermal shutdown circuitry and a high-gain driver stage. It is capable of seamless output transition from light-load to heavy-load

The basic working principle of this chip is that, the input voltage powers the synchronous buck regulator. The on-chip error amplifier compares the output feedback voltage to the internal reference voltage and drives the external P-MOSFETs. When the output voltage drops, the error amplifier will increase the duty cycle of these switches to correct this imbalance and ensure the output voltage to be stable.

The LM2593HVSX-3.3 also supports an external P-MOSFET to enhance the load current capability, where the external MOSFET is directly connected to the VIN and Vs pins which can reduce the VOUT drop-out voltage.

3. Conclusion

In conclusion, LM2593HVSX-3.3 is an advanced high efficient synchronous buck regulator with integrated power MOSFET with wide input voltage, adjustable output voltage and current, low input voltage, low ripple noise, current limit, thermal shutdown, input range under-voltage lockout and soft start. This chip can be used in a wide range of consumer and industrial applications, such as smart terminals, consumer electronic products, netbooks, tablets, GPS, power level communication equipment, mobile robots, gateways and remote intelligence systems.

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