3 说明
TPS65300-Q1 电源是一个单开关模式降压电源和三个线性稳压器的组合。这款器件是单片高压开关稳压器,此稳压器具有一个集成型 1.2A 峰值电流开关,45V 功率金属氧化物半导体场效应晶体管 (MOSFET),和一个低压线性稳压器以及两个电压稳压器控制器。
此器件配有电压监控器,可监视开关模式电源、
3.3V 线性稳压器和 1.234V 线性稳压器的输出电压。一个外部定时电容器用于设定加电延迟时间和复位输出 nRST 的释放时间。该复位输出还用于指示开关模式电源、3.3V 线性稳压器电源或 1.234V 线性稳压器电源是否在设定的限值之外。5V 稳压器在指定的限制范围内跟踪 3.3V 线性稳压器。
TPS65300-Q1 器件开关频率范围介于 2MHz 至 3MHz 之间,从而实现半高电感器和低值输入以及输出陶瓷电容器的使用。外部环路补偿为用户提供了针对适当运行条件而进行转换器响应优化的灵活性。
此器件内置多种保护 特性 ,例如软启动(IGN_EN 开启或使能期间)、逐脉冲电流限制、热感应、以及在功耗过大时关断。
器件信息
| 器件编号 |
封装 |
封装尺寸(标称值) |
| TPS65300-Q1 |
带散热片薄型小外形尺寸封装 (HTSSOP) (24) |
7.80mm × 4.40mm |
| VQFN (24) |
5.00mm × 4.00mm |
4 修订历史记录
Changes from E Revision (March 2014) to F Revision
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Changed the word terminal back to pin throughout the document Go
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Changed the MIN, TYP, and MAX values for the 1.2VSENSE output voltage in the Electrical Characteristics table Go
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Changed the y-axis intervals for the 1.2VSENSE vs Temperature graphGo
Changes from D Revision (August 2013) to E Revision
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Added 器件信息 表和以下全新部分:电源建议,器件和文档支持,以及机械封装和可订购信息Go
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Changed the word pin to terminal throughout the document Go
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Moved the Pin Functions section into the Pin Configuration and Functions sectionGo
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Changed DC CHARACTERISTICS condition statement from TJ = –40°C to 150°C to TJ-Max = 150°CGo
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Changed min value for VIL of IGN_EN from 2 to 2.2 in the DC CHARACTERISTICS tableGo
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Moved all timing requirements out of the Electrical Characteristics table and into the Timing Requirements table Go
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Combined the general application equations with the practical equations to streamline the Typical Application section Go
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Changed Y-axis name from Current (mA) to Efficiency in Figure 17Go
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Moved the Efficiency vs Output Current on VREG graph and the scope plots from the Typical Characteristics section to the Application Curves section Go
Changes from C Revision (April 2013) to D Revision
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Changed VIH max limit from 4 to 3.6 V in DC Characteristics tableGo
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Added 3.7 V condition and values to Input High IIH parameter in DC Characteristics tableGo
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Changed ICharge unit from V to µA in DC Characteristics tableGo
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Changed internal resistor limit text in Ignition Enable Input, IGN_EN pin descriptionGo