• 简体中文
• English

MAX653：5V/3.3V/3V/可调、高效率、低IQ、降压型DC-DC转换器

在较宽负载范围内具有低电源电流、高转换效率

The MAX639/MAX640/MAX653 step-down switching regulators provide high efficiency over a wide range of load currents, delivering up to 225mA. A current-limiting pulse-frequency-modulated (PFM) control scheme gives the devices the benefits of pulse-width-modulated (PWM) converters (high efficiency at heavy loads), while using only 10µA of supply current (vs. 2mA to 10mA for PWM converters). The result is high efficiency over a wide range of loads. The MAX639/MAX640/MAX653 input range is 4V to 11.5V, and the devices provide lower preset output voltages of 5V, 3.3V, and 3V, respectively. Or, the output can be user-adjusted to any voltage from 1.3V to the input voltage. The MAX639/MAX640/MAX653 have an internal 1A power MOSFET switch, making them ideal for minimum-component, low- and medium-power applications. For increased output drive capability, use the MAX649/MAX651/MAX652 step-down controllers, which drive an external P-channel FET to deliver up to 5W.

关键特性 High Efficiency for a Wide Range of Load Currents 10µA Quiescent Current Output Currents Up to 225mA Preset or Adjustable Output Voltage: 5.0V (MAX639) 3.3V (MAX640) 3.0V (MAX653) Low-Battery Detection Comparator Current-Limiting PFM Control Scheme

MAX639、MAX640、MAX653：典型工作电路 应用 5V至3.3V转换 9V电池至5V、3.3V或3V转换 替代高效线性稳压器 便携式仪表与手持终端

数据手册DataSheet

关键参数

相关产品

• MAX649：5V/3.3V/3V或可调、高效率、低IQ、降压型DC-DC控制器

订购型号