TPS54291 4.5V 到 18V 输入、1.5/2.5A、600kHz 双路输出同步降压转换器
说明
TPS54290/1/2 is a dual output fully synchronous buck converter capable of supporting applications with a minimal number of external components. TPS54290/1/2是一个双重输出完全同步降压转换器能够支撑的应用与外部组件的最小数量。It operates from a 4.5 V to 18 V input supply voltage, and supports output voltages as low as 0.8 V and as high as 90% of the input voltage.它的运行方式从4.5 V到18 V输入电源电压,并支持的输出电压低0.8 V,高达90%的输入电压。
Both high-side and low-side MOSFETs are integrated to provide fully synchronous conversion with higher efficiency. 高端和low-side都提供充分的mosfet集成同步转换效率较高。Channel1 can provide up to 1.5 A of continuous current, meanwhile, Channel2 supports up to 2.5 A.Channel1可以提供多达1.5的一个Channel2连续电流,与此同时,支持多达250。
Current mode control simplifies the compensation. 电流模式控制简化了补偿。The external compensation adds flexibility for the user to choose different type of output capacitors.增加灵活性的外部补偿为用户选择不同类型的输出电容。
180° out-of-phase operation reduces the ripple current through the input capacitor, providing the benefit of reducing input capacitance, alleviating EMI and increasing capacitor life.运行180°降低了异相纹波电流通过输入电容,提供的利益,减少输入电容,缓解EMI和增加电容器的生活。
特性特性
- 4.5 V to 18 V Input Range4.5 V到18 V输入范围
- Output Voltage Range 0.8 V to DMAX × VIN(五)输出电压范围DMAX VIN×0.8
- Fully Integrated Dual Buck, 1.5 A/2.5 A完全整合的双重巴克,1.5 A / 2.5 A
- Three Fixed Switching Frequency Versions:三个固定开关频率的版本:
- TPS54290 – 300 kHzTPS54290 - 300千赫
- TPS54291 – 600 kHz千赫的TPS54291 - 600
- TPS54292 – 1.2 MHzTPS54292 - 12兆赫
- Integrated UVLO综合UVLO
- 0.8 VREF With 1% Accuracy (0°C to 85°C)增加1% 0.8 VREF(0°C的准确性至85°C)
- Internal Soft-Start内部Soft-Start
- TPS54290 – 5.2 ms女士TPS54290 - 520
- TPS54291 – 2.6 ms女士TPS54291 - 2.6
- TPS54292 – 1.3 ms女士TPS54292 - 13
- Dual PWM Outputs 180° Out-of-Phase180°异相双PWM输出
- Dedicated Enable for Each Channel专门为每个频道上。使
- Current Mode Control for Simplified Compensation当前模式控制,为简化的补偿
- External Compensation外部补偿
- Pulse-by-Pulse Overcurrent Protection, 2.2 A/3.8 A Overcurrent LimitPulse-by-Pulse过电流保护,2.2 A / 3.8一过电流的限制
- Integrated Bootstrap Switch综合直译开关
- Thermal Shutdown Protection at 145°C在145°热关机保护C