Cxsd6149 is a high efficiency, 1.5MHz fixed frequency, current mode PWM single-chip voltage regulator, which can provide adjustable output voltage and 1.2V, 1.8V fixed output voltage. The working current of the voltage regulator is 300uA when there is no load; when it is turned off, the working current drops below 1uA. The input working voltage range is 2.5V to 6.5V, which is very suitable for electronic products powered by single lithium-ion battery or two to four dry batteries. The duty cycle of cxsd6149 can be up to 100% in low-voltage differential operation mode, which extends the battery life of portable devices. When the output load becomes low, the cxsd6149 works in pulse hopping mode, which ensures low output ripple voltage and is conducive to the application environment sensitive to noise. The switching frequency of 1.5MHz makes the peripheral inductance and capacitance miniaturized. The cxsd6149 has built-in power switch and synchronous rectifier switch, without external Schottky diode. When the feedback terminal voltage is set to 0.6V, the output voltage can be reduced to 0.6V. Small sot23-5l package saves the area of PCB.
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1.5MHz 800mA 同步降压转换器CXSD6149可以提供输出电压可 调品种和1.2V、1.8V等固定输出电压的品种。稳压器在无负载时的工作电流为300uA；当处于关断时， 工作电流降到1uA以下。输入工作电压范围为2.5V至6.5V，非常适合于单节锂离子电池或两至四节干电 池供电的电子产品
目录
产品概述 返回TOP
CXSD6149是一款高效率，1.5MHz固定工作频率，电流模式PWM单片式降压稳压器，可以提供输出电压可 调品种和1.2V、1.8V等固定输出电压的品种。稳压器在无负载时的工作电流为300uA；当处于关断时， 工作电流降到1uA以下。输入工作电压范围为2.5V至6.5V，非常适合于单节锂离子电池或两至四节干电 池供电的电子产品。CXSD6149在低压差工作模式下，占空比可达100%，延长了便携式设备的电池寿命。 在输出负载变低时，CXSD6149用脉冲跳跃模式工作，保证了低的输出纹波电压，有利于对噪声敏感的应用 环境。1.5MHz的开关频率，使得外围的电感和电容可以微型化。CXSD6149内置功率开关管和同步整流开 关，无需外接肖特基二极管。反馈端电压设置为0.6V，可使输出电压低至0.6V。微小的SOT23-5L封装节 省了印制板的面积。
产品特点 返回TOP
?高效率：高达 96%
?1.5MHz 恒定开关频率
?800mA输出电流(VIN=3.6V&Vout=1.8V)
?内置功率开关管及同步整流开关，
?便携式设备 无需外部肖特基二极管
?2.5V至6.5V输入电压范围
?输出电压可低至 0.6V
?允许低压差操作：占空比可达 100%
?低静态工作电流： 300μA(VIN<4.2V)
?电流模式实现优异的线性和负载瞬态响应
?短路保护和过温保护
?待机电流小于 1μA
?节约空间的5引脚SOT23封装
应用范围 返回TOP
?手机和智能电话
? 微处理器和DSP内核供电
?无线和DSL调制解调器
?平板电脑
?数码相机和摄像机
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产品封装图 返回TOP
电路原理图 返回TOP
相关芯片选择指南 返回TOP
| DC-DC(Buck) | |||||||
| Product | Character | Maximum Effciency | Operating Voltage | Quiescent Iq | Output Voltage | Output Versions | Accuracy |
| CXSD6148 | 1.5MHz,700mA PWM | 96% | 2.5~6.5V | 300μA | 0.6~5.0V | Adj 1.8V | ±2% |
| CXSD6149 | 1.5MHz,800mA Synchronous PWM | 96% | 2.5~6.5V | 300μA | 0.6~5.0V | Adj | ±2% |
| CXSD6148L | 1.5MHz,700mA Power Saving Mode/PWM | 96% | 2.5~6.8V | 40μA | 0.6~5.0V | Adj 1.2V/etc | ±2% |
| CXSD6151L | 1.5MHz,700mA Power Saving Mode/PWM | 96% | 2.5~6.8V | 40μA | 0.6~5.0V | Adj 1.2V/etc | ±2% |
| CXSD6152 | 1.5MHz,800mA Synchronous PWM | 96% | 2.5~6.5V | 300μA | 0.6~5.0V | Adj 1.8V | ±2% |
| CXSD6153 | 1.5MHz,800mA Synchronous PWM | 96% | 2.5~6.5V | 300μA | 0.6~5.0V | Adj | ±2% |
| CXSD6154 | 1.5MHz,1000mA Synchronous PWM | 96% | 2.5~6.5V | 350μA | 0.6~5.0V | Adj | ±2% |
| CXSD6155 | 1.2MHz,2000mA Synchronous PWM | 95% | 2.5~6.0V | 300μA | 0.6~5.0V | Adj | ±2% |
| CXSD6155A | 1MHz,2000mA Synchronous PWM | 95% | 2.5～6.5V | 100μA | 0.6～5.0V | Adj | ±2% |
| CXSD6156 | 1.2MHz,3000mA Synchronous PWM | 95% | 2.5～6.0V | 100μA | 0.6～5.0V | Adj | ±2% |
| CXSD6157 | 1.5MHz,700mA Synchronous PWM | 96% | 2.5~6.5V | 300μA | 0.6~5.0V | Adj 1.3V/1.8V | ±2% |
| CXSD6158 | 1.5MHz,800mA | 96% | 2.5～6.5V | 300μA | 0.6～5.0V | Adj | ±2% |
| CXSD6159 | Dual Channel 1.5MHz,600mA Synchronous PWM | 96% | 2.5~6.5V | Act:500μA Slp:45μA | 0.6~5.0V | Adj | ±2% |
| CXSD6160 | 1.5MHz,1.5A Synchronous PWM | 96% | 2.5~6.5V | 300μA | 0.6~5.0V | Adj | ±2% |
| CXSD6161 | 1.5MHz,2000mA Synchronous PWM | 96% | 2.5~6.5V | 300μA | 0.6~5.0V | Adj | ±2% |
| CXSD6162 | 700KHz 0.5A Synchronous PWM | 95% | 6～40V | 0.2mA | 0.765～30V | Adj | ±2% |
| CXSD6163 | 450KHz 2A Synchronous PWM | 95% | 4.75~18V | 1.3mA | 0.925~15V | Adj | ±2% |
| CXSD6163A | 450KHz 2A Synchronous PWM | 95% | 4.75~18V | 1.3mA | 0.925~15V | Adj | ±2% |
| CXSD6165A | 370KHz 3A Synchronous PWM | 95% | 4.75~18V | 1.3mA | 0.925~15V | Adj | ±2% |
| CXSD6166 | 125kHz 3A Asynchronous PWM with EN | 91% | 10～40V | 2.5mA | 0.808～12V | Adj | ±2% |
| CXSD6166A | 125kHz 3A Asynchronous PWM with OVP | 91% | 10～40V | 2.5mA | 0.808～12V | Adj | ±2% |
| CXSD6167 | 200kHz 3A Asynchronous PWM with EN | 91% | 10～40V | 2.5mA | 0.808～12V | Adj | ±2% |
| CXSD6167A | 200kHz 3A Asynchronous PWM with OVP | 91% | 10～40V | 2.5mA | 0.808～12V | Adj | ±2% |
| CXSD6167B | 200kHz 2A Asynchronous PWM with EN | 91% | 10～40V | 2.5mA | 0.808～12V | Adj | ±2% |
| CXSD6168 | 700KHz 2A Synchronous PWM | 95% | 4.5~16V | 0.2mA | 0.6~13V | Adj | ±2% |
| CXSD6168A | 500kHz 2A Synchronous PWM | 95% | 4.5～16V | 400μA | 0.6～13V | Adj | ±2% |
