The CXSD6219 CXSD6219B is a wide input range, high-efficiency,
DC-to-DC step-down switching regulator, capable of delivering up to
2.5A 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, CXSD6219 CXSD6219B 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, CXSD6219 CXSD6219B is a much
superior solution in comparison to other competitions in terms of
efficiency and cost. Cycle-by-cycle current limit provides output
short-circuit protection and an input OVP function guards CXSD6219
CXSD6219B against possible input voltage surge. Overall,
CXSD6219 CXSD6219B is a highlyefficient and robust solution
for DC-DC step-down applications that requires wide input ranges.
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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
CXSD6219 CXSD6219B是一款非常通用的工作电压达18V，输出电流达2/2.5A，
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
CXSD6219 CXSD6219B待机功耗从10mA量级降到了1mA，同时可以耐受高达
30V的高压脉冲。CXSD6219 CXSD6219B采用SOP8封装，可输出2A电流。而
CXSD6219 CXSD6219BB采用ESOP8封装，可输出2.5A电流。
The CXSD6219 CXSD6219B is a wide input range, high-efficiency,
DC-to-DC step-down switching regulator, capable of delivering up to
2.5A 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, CXSD6219 CXSD6219B 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, CXSD6219 CXSD6219B is a much
superior solution in comparison to other competitions in terms of
efficiency and cost. Cycle-by-cycle current limit provides output
short-circuit protection and an input OVP function guards CXSD6219
CXSD6219B against possible input voltage surge. Overall,
CXSD6219 CXSD6219B is a highlyefficient and robust solution
for DC-DC step-down applications that requires wide input ranges.
CXSD6219 CXSD6219B is housed in a ESOP8 Package.
二.产品特点
◆宽输入电压4.2-18V
◆CXSD6219输出2A电流
◆CXSD6219B输出2.5A电流
◆转换效率高达95%
◆轻载高效，待机电流1mA
◆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
◆ Up to 95% at Heavy Load
◆ Capable of Delivering 2.5A
◆ Input OVP at 20V
◆ No External Schottky Diode Needed
◆ Current Mode control
◆ 0.923V Reference for Low Output voltages
◆ Logic Control Shutdown
◆ Thermal shutdown and UVLO
◆ Available in SOP8
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 |
