Texas Instruments TPS54A20 SWIFT 降压转换器
Texas Instruments TPS54A20 SWIFT 降压转换器是一款双相同步串联电容降压转换器，专为输入电压轨为 12V 的小尺寸、低电压应用而设计。 该器件采用独特的拓扑结构，将开关电容电路与双相降压转换器融为一体。 优势包括电感间的自动电流均衡、较低的开关损耗（支持高频 (HF) 操作）以及通过串联电容实现降压。 与 TPS54A20 搭配使用的低值薄型电感显著缩减了解决方案的面积和高度。 该器件采用一种自适应导通时间控制架构，可在高达 10MHz 的工作频率下提供快速瞬态响应和精确稳压。 通过使用锁相环 (PLL) 来锁定基准振荡器的开关信号，从而维持稳定状态下的固定频率操作。
特性
- Two-phase, synchronous series capacitor buck converter
- Automatic current balancing between phases
- 2MHz to 5MHz per phase switching frequency
- 14ns minimum on-time
- 0.51V to 2V output voltage range with ±0.5% feedback reference voltage
- Input overvoltage lockout for 17V surge protection
- Adjustable current limit with auto-restart (hiccup)
- Synchronizes to an external clock
- Fixed frequency in steady-state
- Adaptive on-time control
- Internal feedback loop compensation
- Internal gate drive LDO with external supply option
- EN pin allowing for adjustable input UVLO
- Selectable soft-start time
- Monotonic startup with pre-biased output
- Output Power Good indicator (open-drain)
- Output overvoltage/undervoltage protection
应用
- Telecom, base station, and communications equipment
- Low profile/backside board mounting (< 2mm height)
- Storage, SSD, DDR memory, switches, hubs, routers, and other networking equipment
Functional Block Diagram
Related Development Tool
Texas Instruments TPS54A20EVM-770 评估模块 (EVM)
设计用于评估 TPS54A20 10A 同步双相转换器的性能。
发布日期: 2016-07-06
| 更新日期: 2022-03-11