双路同步降压稳压器控制器 28-WQFN -5 to 125
The LM2647 is an adjustable 200-500kHz dual channel voltage-mode controlled high-speed synchronous buck regulator controller ideally suited for battery powered applications such as laptop and notebook computers. The LM2647 requires only N-channel FETs for both the upper and lower positions of each synchronous stage. It features line feedforward to improve the response to input transients. At very light loads, the user can choose between the high-efficiency Pulse-skip mode or the constant frequency Forced-PWM mode. Lossless current limiting without the use of external sense resistors is made possible by sensing the voltage drop across the bottom FET. A unique adaptive duty cycle clamping technique is incorporated to significantly reduce peak currents under abnormal load conditions. The two independently programmable outputs switch 180° out of phase interleaved switching to reduce the input capacitor and filter requirements. The input voltage range is 5.5V to 28V while the output voltages are adjustable down to 0.6V.
Standard supervisory and control features include Soft-start, Power Good, output Under-voltage and Over-voltage protection, Under-voltage Lockout, Soft-shutdown and Enable.
输出接口数 2
输出电压 0.6V ~ 5V
输出电流 20 A
通道数 2
耗散功率 1000 mW
静态电流 2.50 mA
调节输出数 2
开关频率 200kHz ~ 500kHz
拓扑结构 Buck
占空比 75 %
输入电压Max 28 V
输入电压Min 5.5 V
最大占空比 0.75
工作温度Max 125 ℃
工作温度Min -5 ℃
耗散功率Max 1000 mW
电源电压 5.5V ~ 28V
输入电压 5.5V ~ 28V
安装方式 Surface Mount
引脚数 28
封装 WFQFN-28
封装 WFQFN-28
工作温度 -5℃ ~ 125℃
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 |
---|---|---|
LM2647LQ/NOPB TI 德州仪器 | 当前型号 | 当前型号 |
LM2647LQX/NOPB 德州仪器 | 类似代替 | LM2647LQ/NOPB和LM2647LQX/NOPB的区别 |
LM2647LQ 德州仪器 | 类似代替 | LM2647LQ/NOPB和LM2647LQ的区别 |