TPS54328

具有 Eco-mode™ 的 4.5V 至 18V 输入、3A 同步降压 SWIFT™ 转换器™

The is an adaptive on-time D-CAP2™ mode synchronous buck converter. The TPS54328 enables system designers to complete the suite of various end-equipment power bus regulators with a cost effective, low component count, low standby current solution. The main control loop for the TPS54328 uses the D-CAP2 mode control that provides a fast transient response with no external compensation components.

The adaptive on-time control supports seamless transition between PWM mode at higher load conditions and Eco-mode operation at light loads. Eco-mode allows the TPS54328 to maintain high efficiency during lighter load conditions. The TPS54328 also has a proprietary circuit that enables the device to adopt 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 input VIN.

The output voltage can be programmed from 0.76 V to 7 V. The device also features an adjustable soft start time. The TPS54328 is available in 8-pin DDA and 10-pin DRC packages, and is designed to operate over the ambient temperature range of –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 Input Voltage Range: 4.5 V to 18 V

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Output Voltage Range: 0.76 V to 7 V

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Highly Efficient Integrated FETs Optimized for Lower Duty Cycle Applications

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100 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 Overcurrent Limit

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Auto-Skip Eco-Mode™ for High Efficiency at Light Load