TPS568215OARNNT

TPS568215OA是一款单片8A同步降压转换器，具有自适应导通时间D - CAP3™控制模式。该器件集成了较低的RDS(on)功率MOSFET，简单易用并且高效运行，所需外部组件最少，适用于空间受限的电源系统。主要特性包括非常精确的基准电压、快速负载瞬态响应、Out - of - Audio模式、可调节的电流限制并且无需外部补偿。强制持续导通模式有助于满足高性能DSP和FPGA的严格电压调节精度要求。TPS568215OA采用热增强型18引脚HotRod™QFN封装，并且设计用于在 - 40°C至150°C的结温范围内工作。TPS568215OA与TPS568215和TPS56C215引脚对引脚兼容，用户可在6A至12A范围内灵活选择采用同一大小的解决方案。

The TPS568215OA is a high density synchronous step down buck converter which can operate from 4.5 - V to 17 - V input voltage (VIN). It has 19 - mΩ and 9 - mΩ integrated MOSFETs that enable high efficiency up to 10 A. The device employs D - CAP3™ mode control that provides fast transient response with no external compensation components and an accurate feedback voltage. The control topology provides seamless transition between FCCM operating mode at higher load condition and OOA operation at lighter load condition. OOA feature allows the TPS568215OA to keep switching frequency above the audible frequency range. The TPS568215OA is able to adapt to both low equivalent series resistance (ESR) output capacitors such as POSCAP or SP - CAP, and ultralow ESR ceramic capacitors. The TPS568215OA has three selectable switching frequencies (FSW) 400kHz, 800kHz and 1200kHz which gives the flexibility to optimize the design for higher efficiency or smaller size. There are three selectable current limits. All these options are configured by choosing the right voltage on the MODE pin. The TPS568215OA has a 4.7 - V internal LDO that creates bias for all internal circuitry. There is a feature to overdrive this internal LDO with an external voltage on the VREG5 pin which improves the converter’s efficiency. The undervoltage lockout (UVLO) circuit monitors the VREG5 pin voltage to protect the internal circuitry from low input voltages. The device has an internal pull - up current source on the EN pin which can enable the device even with the pin floating. Soft - start time can be selected by connecting a capacitor to the SS pin. The device is protected from output short, undervoltage and over temperature conditions.

• 集成19mΩ和9.4mΩ金属氧化物半导体场效应晶体管(MOSFET)
• 400kHz、800kHz或1.2MHz的可选FSW，Out - of - Audio功能可保持开关频率超出音频范围
• 可调节电流限制设置，具有断续重启功能
• 整个温度范围内的基准电压为0.6V±1%
• 支持5V外部可选偏置功能，以提升效率
• D - CAP3™针对快速瞬态响应的控制模式
• 0.6V至5.5V输出电压范围
• 支持所有陶瓷电容器
• 针对预偏置输出的单调性启动
• 可调节软启动，默认软启动时间为1ms
• • 40°C至150°C运行结温
• 小型3.5mm x 3.5mm HotRod™四方扁平无引线(QFN)封装

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