说明
LX7180A是一款4A降压稳压器,集成MOSFET,封装在节省空间的QFN12 2 mm x 2 mm中,适用于当今的移动设备。它使用了一种超快速、恒定频率的滞后控制方法,在保持良好调节的同时,最大限度地减少外部滤波器分量。LX7180A参考电压可通过高速(高达3.4 MHz)双向I2C总线从0.6 V编程到1.195 V。LX7180的工作电压范围为3伏至5.5伏,输出0.6伏至100%的输入电压。逐循环电流限制可防止过电流情况。打嗝模式为严重过载或短路故障提供保护。过热条件下,热保护关闭调节器。过电压条件将立即关闭输出,以防止永久损坏。当所有故障条件清除后,LX7180A自动重新启动。
特性
- 0-4 A Step-down Regulator
- Operational Input Supply Voltage Range: 3.0 V - 5.5 V (short durations to 6.5 V)
- Hysteretic Control Offers Best Transient Response
- PWM Switching at a Constant 1.65 MHz
- Power Save Mode (PSM) can be Selected to Improve Light Load Efficiency
- 100% Duty Ratio Operation
- Input Under Voltage and Over Voltage Protection
- Enable and Power Good Function
- I2C Serial Interface at 3.4 Mbps
- Internal Soft-start
- Cycle-by-Cycle Over Current Protection
- Hiccup Mode Protects Against Short Circuit Faults
- Seven Bit Adjustable Reference Voltage via I2C Bus
- RoHS Compliant
参数
类型 | 描述 |
Max Duty Cycle (%) | 100 |
Input Voltage Range Max | 5.5 |
Input Voltage Range Min | 3.0 |
# of Outputs | 1 |
Output Current | 4000 |
Driver Type | Step Down (Buck) |
Synchronous Rectifier | Yes |
Temp Range Max | 85 |
UVLO | Yes |
VoutMax | 3.3 |
Vfb (V) | 0.6 |
VoutMin | 0.6 |



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