TPS54325

4.5V 至 18V 输入、3A 同步降压 SWIFT™ 转换器

The device is an adaptive on-time D-CAP2™ mode synchronous buck converter. The TPS54325 device enables system designers to complete the suite of various end equipment’s power bus regulators with a cost effective, low component count, low standby current solution.

The main control loop for the TPS54325 uses the D-CAP2™ mode control which provides a very fast transient response with no external components. The TPS54325 also has a proprietary circuit that enables the device to adapt to both low equivalent series resistance ESR output capacitors, such as POSCAP or SP-CAP, and ultra-low ESR ceramic capacitors. The device operates from 4.5-V to 18-V VCC input , and from 2.0-V to 18-V VIN input power supply voltage. The output voltage can be programmed between 0.76 V and 5.5 V. The device also features an adjustable slow start time and a power good function. The TPS54325 is available in the 14 pin HTSSOP package, and designed to operate from –40°C to 85°C.

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D-CAP2™ Mode Enables Fast Transient Response

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Low Output Ripple and Allows Ceramic Output Capacitor

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Wide VCC Input Voltage Range: 4.5 V to 18 V

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Wide VIN Input Voltage Range: 2.0 V to 18 V

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Output Voltage Range: 0.76 V to 5.5 V

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Highly Efficient Integrated FET’s Optimized for

Lower Duty Cycle Applications – 120 mΩ High Side

and 70 mΩ Low Side

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High Efficiency, less than 10 µA at shutdown

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High Initial Bandgap Reference Accuracy

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Adjustable Soft Start

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Pre-Biased Soft Start

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700-kHz Switching Frequency fSW

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Cycle By Cycle Over Current Limit

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Power Good Output