LM2679S-12

• Up to 92% conversion efficiency
• Easy-to-use design (using off-the-shelf external components)
• 电阻可编程峰值电流限制，超过3A的范围为7A。
• 120mΩ的DMOS输出开关
• Fixed output and adjustable (1.2V to 37V) versions of 3.3V, 5V and 12V
• Up to ± 2% output tolerance and load conditions across the line
• Wide 8V to 40V Input Voltage Range:
• Internal oscillator at fixed frequency at 260 kHz
• 软启动能力
• Operating junction temperature range from -40 to +125 °C

illustrate

的LM2679系列稳压器是单片集成电路，提供降压开关稳压器能够驾驶出色的线路和负载调节特性5A负载（降压）所有的积极功能。 High efficiency (> 90%) is obtained by using a low on-resistance DMOS power switch. The series includes fixed output voltage and adjustable output versions of 3.3V, 5V and 12V.

THE SIMPLE SWITCHER CONCEPT PROVIDES A COMPLETE DESIGN USING A MINIMUM NUMBER OF EXTERNAL COMPONENTS. 一个较高的固定频率振荡器（260KHz），允许使用体积更小尺寸元件。 一个标准电感器使用的LM2679系列是从几个制造商提供，大大简化了设计过程。

其他功能还包括加入一个软启动时序电容逐步打开稳压器在上电时的输入浪涌电流的能力降低。 LM2679系列还具有内置热关断和电阻可编程电流限制保护设备和负载电路故障条件下的功率MOSFET开关。 The output voltage is guaranteed to a tolerance of ± 2%. 时钟频率控制在公差± 11％。

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• Simple design, high efficiency (> 90%), step-down switching regulator
• Efficient system pre-regulator linear regulator
• Battery charger