LTC3201

• 产品介绍

LTC3201

100毫安超低噪声电荷泵的LED电源输出电流调整

特点

描述 The LTC®3201 is an ultralow noise, constant frequency, charge pump DC/DC converter specifically designed for powering white LEDs. LTC®3201是一款超低噪声，恒定频率，电荷泵DC / DC转换器，专为白光LED供电设计。 The part produces a low noise boosted supply capable of supplying 100mA of output current.部分产生一个低噪声，提高了供电能够提供100mA的输出电流。 LED current is regulated for accurate and stable backlighting.准确和稳定的背光LED电流调节。 A 3-bit DAC provides output current adjust for brightness control. 3位DAC提供输出电流调节亮度控制。

Low external parts count (one small flying capacitor and three small bypass capacitors) and small MSOP-10 package size make the LTC3201 ideally suited for space constrained applications. 低外部元件数（一个小的飞跨电容和三个小的旁路电容）和小型MSOP-10封装的大小使LTC3201非常适合空间受限的应用。 An input noise filter further reduces input noise,thus enabling direct connection to the battery.输入噪声滤波器，进一步降低输入噪声，从而使直接连接到电池。 High switching frequency enables the use of small external capacitors.高开关频率允许使用小的外部电容器。

The LTC3201 contains overtemperature protection and can survive an indefinite output short to GND. LTC3201包含过热保护，并可以生存无限期输出短路到GND。 Internal soft-start circuitry also prevents excessive inrush current on start-up.内部软启动电路，还可以防止过度浪涌电流启动。 A low current shutdown feature disconnects the load from V IN and reduces quiescent current to less than 1µA.低电流关断功能断开从V 负载 ，并降低静态电流小于1μA。

• Input Noise Filter Minimizes Supply Noise 输入噪声滤波器减少电源噪声
• Constant Frequency Operation 恒定频率操作
• 3-Bit LED Current Control 3位LED电流控制
• No Inductors 无电感器
• Low Shutdown Current: I IN 低关断电流：
• Output Current: 100mA输出电流：100mA
• V IN Range: 2.7V to 4.5V V IN范围：2.7V至4.5V
• 1.8MHz Switching Frequency为1.8MHz开关频率
• Soft-Start Limits Inrush Current at Turn-On软启动限制浪涌导通电流
• Short-Circuit and Overtemperature Protected短路和过热保护
• Available in 10-Pin MSOP Package提供10引脚MSOP封装
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