CXSD6228是一颗耐压高至42V，输出电流0.6A的异步降压转换器.。CXSD6229是专为智能电表的供电需求特别优化设计。其采用特别的PWM控制技术，在实现上述要求的同时保持输出纹波最小，对载波通讯的及内部工作模块影响最小
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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
CXSD6228是一颗耐压高至42V，输出电流0.6A的异步降压转换器.。CXSD6229是专为智能电表的供电需求特别优化设计。其采用特别的PWM控制技术，在实现上述要求的同时保持输出纹波最小，对载波通讯的及内部工作模块影响最小。为了防止电力线波动，CXSD6229增加了输入过压保护，当输入电压大于38V后，把输出关掉，保护后端用电设备。
The CXSD6228 is a wide input range, high-efficiency, and high frequency DC-to-DC step-down switching regulator, capable of delivering up to 0.6A of output current. With a fixed switching frequencyof 650KHz, this current mode PWM controlled converter allows the use of small external components, such as ceramic input and output caps, as well as small inductors.CXSD6228 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. An OVP function protects the IC itself and its downstream system against input voltage surges. With this OVP function, the IC can stand off input voltage as high as 42V, making it an ideal solution for industrial applications such as smart meters as well as automotive applications. In automotive systems, power comes from the battery, with its voltage typicallybetween 9Vand 24V. Including cold crank and double battery jump-starts, the minimum input voltage may be as low as 4Vand the maximum up to 36V, with even higher transient voltages. With these high input voltages, linear regulators cannotbe used for high supply currents withoutoverheating the regulator. Instead, high efficiencyswitching regulators such as CXSD6228 must be used to minimize thermal dissipation.CXSD6228 is available SOT23-6 Packages.
二.产品特点
◆宽输入电压4.2-42V
◆0.6A输出电流
◆12V转5V效率高达91%
◆轻载高效，待机电流0.6mA
◆38V输入过压保护
◆耐受输入峰值电压达45V
◆基准电压0.80V
◆Wide Input Operating Range from 4V to 38V
◆Standoff Input Voltage: 42V
◆ Output up to 6V
◆High Efficiency at 12V In 5V Out: Up to 91%:
◆High Efficiency PFM mode at light load
◆ Capable of Delivering 1A
◆ No External Compensation Needed
◆ Current Mode control
◆ Logic Control Shutdown
◆ Thermal shutdown and UVLO
◆ Available in SOT23-6 Package
三.应用范围
◆智能电表
◆载波模块
◆监控摄像模组
◆家庭网关
◆车载智能系统
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 |
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