ADP2126ACDZ-1.20R7

ADP2126/ADP2127 are high-frequency, step-down DC-DC converters optimized for portable applications where board area and battery life are limited. The 6 MHz fixed operating frequency supports the use of miniature ceramic inductors and capacitors, and the regulator utilizes spread spectrum modulation to reduce EMI. In addition, synchronous rectification not only increases efficiency but also reduces external components.

At high load currents, ADP2126/ADP2127 uses a regulated pulse width modulation (PWM) mode to maintain a constant frequency with excellent stability and transient response. Operation under light load is determined by the state of the MODE pin. In forced PWM mode, the converter continues to operate in PWM mode at light load. Under light load conditions in automatic mode, ADP2126/ADP2127 automatically enters energy-saving mode and uses pulse frequency modulation (PFM) to reduce the effective switching frequency to maximize battery life in portable applications.

ADP2126/ADP2127 is enabled by applying an external clock signal from 6 MHz to 27 MHz to the EXTCLK pin. Some models can be enabled with logic high levels. When the external clock is not switched and is logically low, the ADP2126/ADP2127 stops regulation and shuts down, drawing less than 0.3 μA (typical) from the input source.

The input voltage range of the ADP2126/ADP2127 is 2.1 V to 5.5 V, allowing the use of a single Li+/Li polymer battery, a three-cell alkaline battery, a NiMH battery, and other standard power supplies. The ADP2126/ADP2127 uses an internal compensation mechanism to minimize the number of external components and deliver up to 500 mA. Other important features such as cycle-by-cycle peak current limiting, soft-start, undervoltage latching (UVLO), output-to-ground short-circuit protection, and thermal shutdown provide protection for internal and external circuit components.

• 移动电话
• 数码相机/数码摄像机
• 数字音频
• 便携式设备
• 摄像头模块
• 图像稳定系统

• Advantages and features:

  • 1.20 V和1.26 V固定输出电压选项
  • 时钟信号使能
    -- 某些型号同时提供逻辑信号使能
  • 6 MHz工作频率
  • 扩频调制以降低EMI
  • 500 mA连续输出电流
  • 输入电压：2.1 V至5.5 V

  • 0.3 μA（典型值）关断电源电流
  • 引脚可选节能模式
  • 兼容小型多层电感
  • 内置同步整流器
  • 内部补偿
  • 欲了解更多特性，请参考数据手册
  //www.chip100.com/