目录
1.产品概述 2.产品特点 3.应用范围 4.技术规格书下载（PDF文档）
一.产品概述
CXSD6221是一款非常通用的工作电压达18V，输出电流达4A，能量转换效率达95%的高压同步降压转换器。脚位和外围应用与通用的MPS1482完全相同。同时在MPS1482的基础上，增加了轻载高效功能，和输入OVP，使得CXSD6220待机功耗从10mA量级降到了1.5mA，同时可以耐受高达30V的高压脉冲。同时CXSD6221采用了独特的电感短路保护，进一步增加了系统的可靠性。CXSD6221采用ESOP8封装。
The CXSD6221 is a wide input range, high-efficiency, DC-toDC step-down switching regulator, capable of delivering up to 4A of output current. Current mode PWM control allows the use of small external components, such as ceramic input and output caps, as well as small inductors, while still providing low output ripples. On top of the integrated internal synchronous rectifier that eliminates external Schottky diode, CXSD6221 also employs a proprietary control scheme that switches the device into a power save mode during light load, thereby extending the range of high efficiency operation. Therefore, CXSD6221 is a much superior solution in comparison to other competitions in terms of efficiency and cost. Overall, CXSD6221 is a highly efficient and robust solution for DC-DC step-down applications that requires wide input ranges.
二.产品特点
◆宽输入电压4.2-18V
◆4A输出电流
◆电感短路保护
◆转换效率高达95%
◆轻载高效，待机电流1.5mA
◆20V输入过压保护
◆耐受输入峰值电压达30V
◆基准电压0.923V
◆Wide Input Operating Range from 4.5V to 18V
◆ High Efficiency: Up to 90%at Light Load
◆ Capable of Delivering 4A
◆ No External Schottky Diode Needed
◆ Current Mode control
◆ 0.923V Reference for Low Output voltages
◆ Logic Control Shutdown
◆ Thermal shutdown and UVLO
◆ Available in ESOP8 Package
三.应用范围
◆机顶盒
◆LCDTV
◆LCD显示器
◆家庭网关
◆无线路由器
◆玩具
◆车载DVD
◆Irobot自动扫地机
◆AC供电的其他电子产品
四.技术规格书（产品PDF)
需要详细的PDF规格书请扫一扫微信联系我们，还可以获得免费样品以及技术支持！
五.产品封装图
六.电路原理图
七.相关芯片选择指南
| DC-DC>同步降压 | |||||||
| Device | Device | Architecture | VIN | VIN | VOUT | VOUT | IOUT |
| Description | (min) | (max) | (min) | (max) | (max) | ||
| (V) | (V) | (V) | (V) | (A) | |||
| CXSD62018 | I2C 18V/2.5A同步降压 | I2C控制 | 4.2 | 18 | 0.7 | 12 | 2.5 |
| CXSD6219 | 18V/2A同步降压 | 外部补偿 | 4.2 | 18 | 0.923 | 6 | 2 |
| CXSD6219B | 18V/2.5A同步降压 | 外部补偿 | 4.2 | 18 | 0.923 | 6 | 2 |
| CXSD6220 | 18V/3A同步降压 | 外部补偿 | 4.2 | 18 | 0.923 | 6 | 3 |
| CXSD6221 | 18V/4A同步降压 | 外部补偿 | 4.2 | 18 | 0.923 | 9 | 4 |
| CXSD6222 | 18V/2A同步降压 | 内部补偿 | 4.2 | 18 | 0.8 | 6 | 2 |
| CXSD6223 | 24V/1.2A异步降压 | 内部补偿 | 4.2 | 24 | 0.81 | 6 | 1.2 |
| CXSD6224 | 24V/0.3A异步降压 | 内部补偿 | 4.2 | 24 | 0.81 | 6 | 0.3 |
| CXSD6225 | 42V/1.5A异步降压 | 内部补偿 | 4.2 | 38 | 0.8 | 6 | 1.5 |
| CXSD6226 | 36V/3A异步降压 | 内部补偿 | 4.2 | 36 | 0.85 | 12 | 3 |
| CXSD6227 | 36V/3.5A异步降压 | 内部补偿 | 4.2 | 36 | 0.8 | 12 | 3.5 |
| CXSD6228 | 42V/0.6A异步降压 | 内部补偿 | 4.2 | 38 | 0.8 | 12 | 0.6 |
| CXSD6229 | 42V/0.6A异步降压 | 内部补偿 | 4.2 | 38 | 0.8 | 12 | 0.6 |
| CXSD6230 | 42V/0.4A异步降压 | 内部补偿 | 4.2 | 38 | 0.8 | 6 | 0.4 |
| CXSD6231 | 7V/1.2A同步降压 | 内部补偿 | 2.6 | 7 | 0.6 | 5 | 1.2 |
| CXSD6232 | 6V/1.2A同步降压 | 内部补偿 | 2.6 | 6 | 0.6 | 5 | 1 |
| CXSD6233 | 6V/2A 3MHz同步降压 | 内部补偿 | 2.6 | 5.5 | 0.6 | 5 | 2 |
| CXSD6234 | 6V/2A 3MHz同步降压 | 内部补偿 | 2.6 | 5.5 | 0.6 | 5 | 2 |
| CXSD6235 | 6V/3A同步降压 | 外部补偿 | 3.6 | 6 | 0.8 | 5 | 3 |
| CXSD6235A | 6V/3A同步降压 | 外部补偿 | 2.5 | 6 | 0.8 | 5 | 3 |
| CXSD6235B | 6V/3A同步降压 | 外部补偿 | 2.5 | 6 | 0.8 | 5 | 3 |
| CXSD6236 | 6V/3.5A快速响应同步降压 | 内部补偿 | 2.6 | 5.5 | 0.45 | 5 | 3.5 |
| CXSD6237 | 6V/1.2A同步降压 | 内部补偿 | 2.6 | 6 | 0.6 | 5 | 1 |
| CXSD6238 | I2C控制5A快速响应同步降压 | 内部补偿 | 2.5 | 5.5 | 0.6 | 1.23 | 3.5 |
| CXSD6239 | 6V/1.2A同步降压 | 内部补偿 | 2.6 | 6 | 0.6 | 5 | 1 |
