TPS54428
- D-CAP2™ Mode Enables Fast Transient
Response - Low Output Ripple and Allows Ceramic Output
Capacitor - Wide VIN Input Voltage Range: 4.5 V to 18 V
- Output Voltage Range: 0.76 V to 7.0 V
- Highly Efficient Integrated FETs Optimized
for Lower Duty Cycle Applications
– 70 mΩ (High Side) and 53 mΩ (Low Side) - High Efficiency, Less Than 10 µA at Shutdown
- High Initial Bandgap Reference Accuracy
- Adjustable Soft Start
- Pre-Biased Soft Start
- 650-kHz Switching Frequency (fSW)
- Cycle By Cycle Over Current Limit
- Auto-Skip Eco-mode™ for High Efficiency at Light
Load
The TPS54428 is an adaptive on-time D-CAP2™ mode synchronous buck converter.
The TPS54428 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 TPS54428 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 TPS54428 to maintain high efficiency during lighter load conditions.
The TPS54428 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 VIN input.
The output voltage can be programmed between 0.76 V and 7.0 V.
The device also features an adjustable soft start time.
The TPS54428 is available in 8-pin DDA package 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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技术文档
| 顶层文档 | 类型 | 标题 | 格式选项 | 下载最新的英语版本 | 日期 | |
|---|---|---|---|---|---|---|
| * | 数据表 | TPS54428 4.5-V to 18-V Input, 4-A Synchronous Step-Down Converter With Eco-Mode™ 数据表 (Rev. D) | PDF | HTML | 2016-1-20 | ||
| 应用手册 | Optimize Output Filter on D-CAP2 for Stability Improvement | 2017-6-13 | ||||
| 应用手册 | TPS54X28 应用指导 | 2015-9-2 | ||||
| 应用手册 | 基于带有纹波注入谷底检测定导通时间频域分析的D-CAP2™频率响应模型 | 英语版 | 2015-9-2 |
设计与开发
如需其他信息或资源，请点击以下任一标题进入详情页面查看（如有）。
TPS54428EVM-052 — 用于 TPS54428 同步降压转换器（具有自动跳过 Eco-Mode）的评估模块
TPS54428EVM-052 是一款组装完备且经过测试的电路，用于评估 TPS54428 同步降压转换器。此 EVM 在 4.5V 至 18V 输入电压范围内运行，且可在高达 4A 的电流下提供 1.05V 的输出电压。TPS54428 的主控制环路采用 D-CAP2™ 模式控制，无需在相位补偿中使用外部组件即可实现超快的瞬态响应。
| 封装 | 引脚 | CAD 符号、封装和 3D 模型 |
|---|---|---|
| HSOIC (DDA) | 8 | Ultra Librarian |
| VSON (DRC) | 10 | Ultra Librarian |
订购和质量
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