[原创] TI TPS548D22小型降压DC－DC转换方案

TI公司的TPS548D22是具有自适应开态时间,D-CAP3模拟控制的小型降压DC/DC转换器,集成了高边开态电阻2.9mΩ和低边开态电阻1.2mΩ的FET,精度0.5% 0.9V基准电压,环境温度–40℃ 到125℃,主要用在企业存储,SSD和NAS,无线和有线通信基础设备,工业PC,自动化,ATE,PLC,视频监测,企业服务器,交换机和路由器以及ASIC, SoC, FPGA, DSP核和I/O电源.本文介绍了TPS548D22主要特性,功能框图,应用电路以及评估板TPS548D22EVM-784主要特性和电指标,电路图,材料清单和PCB设计图.

The TPS548D22 device is a compact single buck converter with adaptive on-time, D-CAP3 mode control. It is designed for high accuracy, high efficiency, fast transient response, ease-of-use, low external component count and space-conscious power systems.

This device features full differential sense, TI integrated FETs with a high-side on-resistance of 2.9 mΩ and a low-side on-resistance of 1.2 mΩ. The device also features accurate 0.5%, 0.9-V reference with an ambient temperature range between –40℃ and 125℃. Competitive features include: very low external component count, accurate load regulation and line regulation, auto-skip or FCCM mode operation, and internal soft-start control.

The TPS548D22 device is available in 5 mm × 7 mm, 40-pin, LQFN-CLIP (RVF) package (RoHs exempt).

TPS548D22主要特性:

Conversion Input Voltage Range (PVIN): 1.5 V to 16 V..

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