摘要：  TPS54239是一种自适应的TPS54239准时D-CAP2模式同步巴克转换器。使系统的TPS54239设计师完成套各种端设备功率总线监管机构与一个成本有效的、低组件数量、低待机电流的解决方案。

关键字：  同步巴克转换器，TPS5423

TPS54239是一种自适应的TPS54239准时D-CAP2模式同步巴克转换器。使系统的TPS54239设计师完成套各种端设备功率总线监管机构与一个成本有效的、低组件数量、低待机电流的解决方案。

The TPS54239 is an adaptive on-time D-CAP2 mode synchronous buck converter. The TPS54239 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 TPS54239 uses the D-CAP2 mode control that provides a fast transient response with no external compensation components. The TPS54239also 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 23-V VIN input. The output voltage can be programmed between 0.76 V and 7 V. The device also features an adjustable soft start time. TheTPS54239 is available in the 8-pin DDA package， and designed to operate from –40°C to 85°C.

Features

D-CAP2 Mode Enables Fast Transient Response Low Output Ripple and Allows Ceramic Output Capacitor Wide VIN Input Voltage Range: 4.5 V to 23 V Output Voltage Range: 0.76 V to 7.0 V Highly Efficient Integrated FETs Optimized for Lower Duty Cycle Applications – 140 mΩ (High Side) and 70 m (Low Side) High Efficiency， less than 10 µA at shutdown High Initial Bandgap Reference Accuracy Adjustable Soft Start Pre-Biased Soft Start 600-kHz Switching Frequency (fSW) Cycle By Cycle Over Current Limit