2.95 V至6 V的输入, 4 A输出, 2 - MHz的同步降压型 2.95-V to 6-V Input, 4-A Output, 2-MHz, Synchronous Step-Down
The TPS54478 device is a full featured 6-V, 4-A, synchronous step down current mode converter with two integrated MOSFETs.
The TPS54478 enables small designs by integrating the MOSFETs, implementing current mode control to reduce external component count, reducing inductor size by enabling up to 2-MHz switching frequency, and minimizing the IC footprint with a small 3mm × 3mm thermally enhanced WQFN package.
The TPS54478 provides accurate regulation for a variety of loads with an accurate ±1% Voltage Reference VREF over temperature.
Efficiency is maximized through the integrated 30-mΩ MOSFETs and 525-µA typical supply current. Using the enable pin, shutdown supply current is reduced to 2.5 µA by entering a shutdown mode.
Under voltage lockout is internally set at 2.6 V, but can be increased by programming the threshold with a resistor network on the enable pin. The output voltage startup ramp is controlled by the slow start pin. An open drain power good signal indicates the output is within 93% to 107% of its nominal voltage.
Cycle-by-cycle current limit, hiccup overcurrent protection, and thermal shutdown protect the device during an overcurrent condition.
The TPS54478 is supported in the SwitcherPro™ Software Tool at www.ti.com/switcherpro.
For more SWIFT documentation, see the website at www.ti.com/swift.
输出接口数 1
输出电压 0.6V ~ 4.5V
输出电流 4 A
静态电流 35.0 µA
调节输出数 1
开关频率 200kHz ~ 2MHz
拓扑结构 Buck
输入电压Max 6 V
输入电压Min 2.95 V
输出电压Max 4.5 V
输出电压Min 0.6 V
输出电流Max 4 A
工作温度Max 150 ℃
工作温度Min -40 ℃
输入电压 6 V
安装方式 Surface Mount
引脚数 16
封装 WFQFN-16
封装 WFQFN-16
工作温度 -40℃ ~ 150℃ 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 |
---|---|---|
TPS54478RTER TI 德州仪器 | 当前型号 | 当前型号 |
TPS54478RTET 德州仪器 | 类似代替 | TPS54478RTER和TPS54478RTET的区别 |