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
The CXSD6249 is a high efficiency current mode synchronous buck PWM DC-DC regulator. The internal generated 0.8V precision feedback reference voltage is designed for low output voltage. Low RDS (ON) synchronous switch dramatically reduces conduction loss. To extend battery life for portable application, 100% duty cycle is supported for low-dropout operation. Shutdown mode also helps saving the current consumption. The CXSD6249 is packaged in SOP-8L to reduce PCB space.
二.产品特点
˙Input Voltage Range: 2.5 to 5.5V
˙Adjustable Output Voltage From 0.8V to VCC
˙Precision Feedback Reference Voltage: 0.8V (±2%)
˙Output Current: 2A (Max.)
˙Duty Cycle: 0~100%
˙Internal Fixed PWM Frequency: 1MHz
˙Low Quiescent Current: 100μA
˙No Schottky Diode Required
˙Built-in Soft Start
˙Current Mode Operation
˙Over Temperature Protection
˙Package: SOP-8L
三.应用范围
Ø Cellular Telephone
Ø Wireless and DSL Modems
Ø Digital Still Cameras
Ø Portable Products
Ø MP3 Players
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
| 同步降压（Buck）转换器SYNCHRONOUS STEP-DOWN(BUCK) CONVERTERS | ||||||||||
| Part No. | VIN | Load | ISW Limit | Feedback | Switching | Soft | Notes | Package | Status | |
| (Min) | (Max) | Current | (Typ) | Voltage | Frequency | Start | ||||
| (V) | (A) | (A) | (V) | (kHz) | ||||||
| CXSD6240 | 2.5 | 5.5 | 0.8 | 1.25 | 0.6 | 1500 | Internal | Internal Comp | SOT23-5 | MP |
| CXSD6241 | 2.5 | 5.5 | 1 | 1.5 | 0.6 | 1500 | Internal | Internal Comp | TSOT23-5L /SOT23-5L/DFN-6L | MP |
| CXSD6242 | 2.5 | 5.5 | 1.5 | 2.35 | 0.6 | 1500 | Internal | Internal Comp | SOP8E DFN10/MSOP10E | MP |
| CXSD6243 | 2.5 | 5.5 | 2 | 3.35 | 0.6 | 1500 | Internal | Internal Comp | SOP8E DFN10/MSOP10E | MP |
| CXSD6244 | 2.5 | 5.5 | 3 | 5 | 0.6 | 1500 | Internal | Internal Comp | SOP8E DFN10 MSOP10E | MP |
| CXSD6245 | 2.5 | 5.5 | 1A*2 | 1.5 | 0.6 | 1500 | Internal | Dual Channel | MSOP10E DFN10 | MP |
| CXSD6246 | 2.5 | 5.5 | 1A*2 | 1.5 | 0.6 | 1500 | Internal | Dual Channel | DFN12 | MP |
| CXSD6247 | 2.5 | 5.5 | 1A*2 | 1.5 | 0.6 | 1500 | Internal | Dual Channel | DFN10 | MP |
| CXSD6248 | 2.5 | 5.5 | 2 | 3.3 | 0.6 | 1500 | Internal | Internal Comp | SOP8E | MP |
| CXSD6249 | 2.5 | 5.5 | 2 | 3.3 | 0.8 | 1000 | Internal | Internal Comp | SOP8E | MP |
| CXSD6250 | 2.5 | 5.5 | 3 | 5 | 0.8 | 1000 | Internal | Internal Comp | SOP8E | MP |
| CXSD6251 | 4.75 | 23 | 2 | 3.4 | 0.923 | 340 | External | External Comp | SOP8 SOP8E | MP |
| CXSD6252 | 4.75 | 23 | 3 | 3.4 | 0.923 | 340 | External | External Comp | SOP8E | MP |
