X4003S8I-4.5A

Series:	--
Packaging:	Tube
Part Status:	Obsolete
Type:	Simple Reset/Power-On Reset
Number of Voltages Monitored:	1
Output:	Open Drain or Open Collector
Reset:	Active Low
Reset Timeout:	100 ms Minimum
Voltage - Threshold:	4.62V
Operating Temperature:	-40°C ~ 85°C (TA)
Mounting Type:	Surface Mount
Package / Case:	8-SOIC (0.154", 3.90mm Width)
Supplier Device Package:	8-SOIC
Base Part Number:	X4003

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Introduction

The X4003S8I-4.5A is a microcontroller-based synchronous rectified buck switching regulator which is designed to provide low current losses and high power efficiency in a wide range of applications from DC industrials, medical and consumer applications to lighting, LCDs and power over Ethernet (PoE) systems. The X4003S8I-4.5A is a highly integrated regulator with several built-in features including a programmable duty cycle, flexible output current limits, over-voltage protection and a wide range of adjustable parameters. The X4003S8 is a single-stage synchronous rectified buck regulator with a constant frequency, current mode control topology. It is designed to drive up to 4.5A of output current while staying free from switching losses and thermal dependency.

Application Field

The X4003S8I-4.5A synchronous rectified buck regulator is suitable for high power applications such as DC/DC converters, LED lighting, LCD displays, audio amplifiers and other electronic devices. The device is highly efficient, providing up to 4.5A of output current with low switching losses and high power efficiency. The main applications include DC-DC conversion, power over Ethernet systems, automotive and industrial applications, medical and consumer applications, LED lighting, and LCDs.

Working Principle

The X4003S8I-4.5A synchronous rectified buck regulator is based on a constant frequency, current mode control topology. It uses a high-frequency, fixed-frequency PWM switching circuit to convert input voltage to the desired output voltage. The device operates at a fixed frequency of 1.2MHz, which allows a wide range of input voltage and current. The switching frequency is automatically adjusted to achieve the required output power. The regulator features built-in feedback loop compensation and is capable of synchronizing with an external clock.The device is capable of driving up to 4.5A of output current. It is designed to minimize switching losses and thermal dependencies. The voltage drop on the internal MOSFETs is minimized with an optimized on-time scheduling. The device also features output current limit, over-voltage protection and programmable soft-start. The device can be used in either single output or multi-output configurations.

Conclusion

The X4003S8I-4.5A synchronous rectified buck regulator is a highly efficient and integrated device which is suitable for high power applications. It is based on a constant frequency, current mode control topology and is capable of up to 4.5A of output current. It features built-in feedback loop compensation, a wide range of adjustable parameters and over-voltage protection. The device is designed to minimize switching losses and thermal dependencies and is suitable for single output or multi-output configurations.

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