4.5V 至 18V 输入、3A/2A/2A 输出同步三路降压转换器 40-VQFN -40 to 125
The TPS65251-x features three synchronous wide-input range, high-efficiency buck converters. The converters are designed to simplify its application while giving the designer the option to optimize their usage according to the target application.
The converters can operate in 5-, 9-, 12- or 15-V systems and have integrated power transistors. The output voltage can be set externally using a resistor divider to any value between 0.8 V and close to the input supply. Each converter features an enable pin that allows a delayed start-up for sequencing purposes, soft-start pin that allows adjustable soft-start time by choosing the soft-start capacitor, and a current limit RLIMx pin that enables the designer to adjust current limit by selecting an external resistor and optimize the choice of inductor. The current mode control allows a simple RC compensation.
The switching frequency of the converters can either be set with an external resistor connected to ROSC pin or can be synchronized to an external clock connected to the SYNC pin if needed. The switching regulators are designed to operate from 300 kHz to 2.2 MHz. 180° out-of-phase operation between Buck 1 and Buck 2, 3 Buck 2 and 3 run in phase minimizes the input filter requirements.
TPS65251-x features a supervisor circuit that monitors each converter output. The PGOOD pin is asserted when sequencing is done, all PG signals are reported and a selectable end of reset time lapses. The polarity of the PGOOD signal is active high.
All converters feature an automatic low-power pulse PFM skipping mode, which improves efficiency during light loads and standby operation, while ensuring a very-low output ripple, allowing for a value of less than 2% at low output voltages.
输出接口数 3
输出电压 0.8V ~ 17V
输出电流 3A, 2A
静态电流 1.00 mA
调节输出数 3
开关频率 300kHz ~ 2.2MHz
拓扑结构 Buck
输入电压Max 18 V
输入电压Min 4.5 V
输出电压Max 17 V
输出电压Min 0.8 V
工作温度Max 125 ℃
工作温度Min 40 ℃
输入电压 18 V
安装方式 Surface Mount
引脚数 40
封装 VQFN-40
封装 VQFN-40
工作温度 -40℃ ~ 125℃ TJ
产品生命周期 Active
包装方式 Tape & Reel TR
RoHS标准 RoHS Compliant
含铅标准 Lead Free
型号/品牌 | 代替类型 | 替代型号对比 |
---|---|---|
TPS65251-3RHAT TI 德州仪器 | 当前型号 | 当前型号 |
TPS65251-3RHAR 德州仪器 | 类似代替 | TPS65251-3RHAT和TPS65251-3RHAR的区别 |