CXSU6387是一款0.85V启动，输出功率达3W，并能真关断的同步升压转换器。CXSU6387真关断的特性可以实现真正的关断和短路保护，免除了客户在USB接口应用时，在升压后面再加限流器来实现接口短路保护，大大节省了成本。同时CXSU6387在空载待机时，功耗低至40uA左右。加之其可使用体积超小的陶片电容，2M开关频率，
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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
CXSU6387是一款0.85V启动，输出功率达3W，并能真关断的同步升压转换器。CXSU6387真关断的特性可以实现真正的关断和短路保护，免除了客户在USB接口应用时，在升压后面再加限流器来实现接口短路保护，大大节省了成本。同时CXSU6387在空载待机时，功耗低至40uA左右。加之其可使用体积超小的陶片电容，2M开关频率，可采用超小的电感以及本身SOT23-5的小体积封装，特别适合PCB空间有限的手持设备，如智能手机，平板电脑等。CXSU6387采用固定输出电压方式，有2.1V，3.3V，5.0V三种电压可选。
The CXSU6387 is a high efficiency synchronous step-up converter that can provide up to 3W of power to a boosted output from a low voltage source. Unlike most step-up converter, not only it starts up at a very low input voltage as low as 0.85V, it also incorporates circuits that disconnect the input from output, during shutdown, short-circuit, output current overloading, or other events when output is higher than the input. This eliminates the need for an external MOSFET and its control circuitry to disconnect the input from output, and provides robust output overload protection. The CXSU6387 starts up from a voltage as low as 0.85V making it ideal for applications with single-cell or two-cell alkaline, NiCd, and NiMh batteries. A switching frequency of 2MHz minimizes solution footprint by allowing the use of tiny and low profile inductors and ceramic capacitors. An internal synchronous MOSFET provides highest efficiency and with a current mode control that is internally compensated, external parts count is reduced to minimal. CXSU6387 is available in three output voltage options. They are 2.1V, 3.3V and 5V. It is housed in a tiny SOT23-5 package.
二.产品特点
◆0.85V启动
◆3W输出功率
◆高达96%的转换效率
◆2MHz开关频率
◆PWM控制方式
◆空载待机电流50uA
◆输出真关断
◆真正的短路保护功能
◆固定输出电压2.1/3.3/5.0V
◆Output Disconnect
◆ Short-circuit Protection
◆ 3W Output Power
◆ Output to Input Reversed Current Protection
◆ 0.85V Low Start-up Voltage
◆ VIN range from 0.6V to 4.5V
◆ Up to 96% Efficiency
◆ 40μA No load IQ and light load PFM Mode
◆ Internal Synchronous Rectifier
◆ Current Mode control
◆ Logic Control Shutdown and Thermal shutdown
◆ SOT23-5 Package
三.应用范围
◆智能手机
◆平板电脑
◆移动电源
◆移动MIFI
◆其他电池供电类设备
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>同步升压 | |||||||||||
| Device | Device | Architecture | VIN | VOUT | Isw | Vfb | Switching | IQ | Package | ||
| Description | (min) | (max) | (min) | (max) | (max) | (V) | Frequency | (uA) | |||
| (V) | (V) | (V) | (V) | (A) | (Hz) | ||||||
| CXSU6382 | 12W/20V异步升压 | 外部补偿 | 2.7 | 5.5 | Vin | 20 | 可调 | 0.6 | 可调 | 600 | ESOP8 |
| CXSU6383 | 10uA Iq 同步升压 | 内部补偿 | 0.85 | 4.5 | 2.1 | 5 | 0.7 | 0.6 | 1M | 10 | SOT23-5 |
| CXSU6384 | 500mA同步升压 | 内部补偿 | 0.85 | 4.5 | 2.1 | 5 | 1 | 0.6 | 1M | 60 | SOT23-5 |
| CXSU6385 | 500mA 3-Pin同步升压 | 内部补偿 | 0.85 | 4.5 | 3.3 | 5 | 1 | N/A | 1M | 60 | SOT89-3 |
| CXSU6386 | 900mA真关断同步升压 | 内部补偿 | 0.85 | 4.5 | 2.1 | 5 | 1.5 | 0.6 | 2M | 40 | DFN2x2-6 |
| CXSU6387 | 3W真关断同步升压 | 内部补偿 | 0.85 | 4.5 | 2.1 | 5 | 1.5 | N/A | 2M | 40 | SOT23-5 |
| CXSU6388 | 5V/2.5A真关断同步升压 | 内部补偿 | 2.65 | 4.5 | 5 | 5 | 5 | N/A | 1M | 120 | DFN3x3-12 |
| CXSU6389 | 5V/2A真关断同步升压 | 内部补偿 | 3.1 | 4.5 | 5 | 5 | 5 | N/A | 1M | 120 | DFN3x3-12 |
| CXSU6390 | 5V/2.5A真关断同步升压 | 内部补偿 | 3.1 | 4.5 | 5 | 5 | 5 | N/A | 1M | 120 | DFN3x3-12 |
| CXSU6391 | 5V/2.5A真关断同步升压 | 内部补偿 | 1.8/3.1 | 5 | Vin | 5.5 | 6 | 0.6 | 1M | 50 | DFN3x3-12 |
| CXSU6392 | 5V/2.5A真关断同步升压 | 内部补偿 | 1.8/3.1 | 5 | Vin | 5.5 | 6 | 0.6 | 1M | 50 | QFN3x3-16 |
| CXSU6393 | 5V/2.5A真关断同步升压 | 纯PWM/内部补偿 | 1.8/3.1 | 5 | Vin | 5.5 | 6 | 0.6 | 1M | 10000 | QFN3x3-16 |
| CXLE8201 | 高效单串10颗LED驱动 | 外部补偿 | 2.7 | 6 | Vin | 40 | 0.7 | 0.2 | 600K | 600 | SOT23-6 |
| CXLE8202 | 高效单串10颗LED驱动 | 外部补偿 | 2.7 | 6 | Vin | 40 | 0.7 | 0.2 | 600K | 600 | DFN2x2-6 |
| CXLE8203 | 10W/24V异步升压 | 内部补偿 | 2.7 | 6 | Vin | 24 | 3 | 0.2 | 1M | 250 | SOT23-6 |
| CXLE8204 | 高效单串10颗LED驱动 | 内部补偿 | 2.7 | 6 | Vin | 40 | 1 | 0.2 | 800K | 250 | SOT23-6 |
