一级代理MP2119，MP2119/ MP2119DQ集成了100mΩ的高侧开关和一个100mΩ的同步整流器,没有一个***率的外部肖特基二极管的峰值电流模式控制及内部补偿。MP2119/ MP2119DQ 基础的解决方案提供了一个非常紧凑的元件数量***少的一个足迹。采用小型3mm x 3mm 10引线QFN封装。***MP2119/ MP2119DQ 2A, 5.5V 同步***开关稳压器 价格***新！
MP2119/ MP2119DQ是内部补偿1.5MHz的固定频率PWM同步***稳压器。MP2119/ MP2119DQ输入工作电压2.7V~5.5V，输出电压低至0.8V。
MP2119/ MP2119DQ特征
•输出电流:2A
•输入范围：2.7V~5.5V
•可调输出:0.8V~0.9xVIN
•1.5MHz的固定开关频率
•全陶瓷电容设计
•内部软启动
•频率同步输入
•电源良好输出
•热关断
•逐周期电流限制
•短路保护
•封装：QFN10（3mm x 3mm ）
P2119/ MP2119DQ应用
•微处理器/ ASIC的/的DSP / FPGA的内核及I/ O电源
•打印机和液晶电视
•网络和电信设备
•负载点稳压器
***MP2119/ MP2119DQ 2A, 5.5V 同步***开关稳压器 价格***新！
MP2119/ MP2119DQ******大额定值
IN to GND ...................................... –0.3V to +6V
SW to GND.......................... –0.3V to VIN + 0.3V
SW to GND............ -2.5V to VIN+2.5V for <50nS
FB, EN/SYNC, POK to GND.......... –0.3V to +6.5V
BS to SW .................................... –0.3V to +6.5V
Junction Temperature...............................150°C
Lead Temperature ....................................260°C
Storage Temperature ..............–65°C to +150°C
工作环境：
Supply Voltage VIN.......................... 2.7V to 5.5V
Output Voltage VOUT ................. 0.8V to 0.9 x VIN
Operating Temperature .............–40°C to +85°C
MP2119/ MP2119DQ引脚说明：
|
Pin # |
Name |
Description |
|
6 |
POK |
Open Drain Power Okay Output. “HIGH”output indicates VOUT is within &plu***n;10% window. “LOW”output indicates VOUT is out of &plu***n;10% window. POK is pulled down in shutdown. |
|
4.7 |
IN |
Input Supply. A decoupling capacitor to ground is required close to these pins to reduce switching spikes. |
|
3.8 |
SW |
Switch Node Connection to the Inductor. These pins connect to the internal high and lowside power MOSFET switches. All SW pins must be connected together externally. |
|
2.9 |
GND |
Ground. Connect these pins with larger copper areas to the negative terminals of the input and output capacitors |
|
5 |
BS |
Bootstrap. A capacitor between this pin and SW provides a floating supply for the high-side gate driver. |
|
1 |
FB |
Feedback. This is the input to the error amplifier. An external resistive divider connects this pin between the output and GND. The voltage on the FB pin compares to the internal 0.8V reference to set the regulation voltage. |
|
10 |
EN/SYNC |
Enable and Frequency Synchronization Input Pin. Forcing this pin below 0.4V shuts down the part. Forcing this pin above 1.6V turns on the part. Applying a 1MHz to 2MHz clock signal to this pin synchronizes the internal oscillator frequency to the external source. |