AAT3177A High Current, High Efficiency Charge Pump with Auto-Timer
The AAT3177A is a high output current, high efficiency, low noise, low profile charge pump DC/DC converter. The device is ideal for multi-functional LED photo-flash applications where solution cost, size, and efficiency are critical. The AAT3177A is capable of driving a regulated output current up to 800mA. Output current levels can be easily programmed in 16 steps through SKYWORKS' Simple Serial Control™ (S2Cwire™) interface controlled by a single microcontroller GPIO line. This allows smooth transitions and flexible adjustment of brightness in flash or other lighting modes. The maximum output current can also be set with an external RSET resistor. The tri-mode (1X/1.5X/2X) operation of the internal charge pump offers excellent power efficiency throughout the output current range for both flash and movie modes. Combined with a low external parts count (two 1μF flying capacitors and two small bypass capacitors at VIN and OUT), the AAT3177A is ideally suited for small battery-powered applications. The AAT3177A has a thermal management system to protect the device in the event of a short-circuit condition at the output pin. Built-in soft-start circuitry prevents excessive inrush current during start-up. The shutdown feature disconnects the load from VIN and reduces quiescent current to less than 1μA. The AAT3177A is available in a Pb-free, thermallyenhanced 12-pin 3x3mm TDFN package and is specified over the -40°C to +85°C temperature range.
技术特性
订购信息 Ordering Information
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应用领域 APPLICATION
功能框图 Functional Block Diagram
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| 应用技术支持与电子电路设计开发资源下载 | 版本信息 | 大小 |
| AAT3177A 数据资料DataSheet下载:pdf | Rev.V2 | 2 页 |
