稳压型、5V电荷泵DC-DC转换器

 

器件号	Replacement	Explanation

说明

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The MAX619 step-up charge-pump DC-DC converter delivers a regulated 5V ±4% output at 50mA over temperature. The input voltage range is 2V to 3.6V (two battery cells).

The complete MAX619 circuit fits into less than 0.1in² of board space because it requires only four external capacitors: two 0.22µF flying capacitors, and 10µF capacitors at the input and output.

Low operating supply current (150µA max) and low shutdown supply current (1µA max) make this device ideal for small, portable, and battery-powered applications. When shut down, the load is disconnected from the input.

The MAX619 is available in 8-pin DIP and SO packages.

MAX619：典型工作电路 放大+

关键特性

• Regulated 5V ±4% Charge Pump
• Output Current Guaranteed over Temperature
  • 20mA (V_IN ≥ 2V)
    
  • 50mA (V_IN, ≥ 3V)
• 2V to 3.6V Input Range
• No Inductors; Very Low EMI Noise
• Ultra-Small Application Circuit (0.1in²)
• Uses Small, Inexpensive Capacitors
• 500kHz Internal Oscillator
• Logic-Controlled 1µA Max Shutdown Supply Current
• Shutdown Disconnects Load from Input
• 8-Pin DIP and SO Packages

应用

• 5V闪存编程器
• 电池供电微处理器系统
• 紧凑的5V运放电源
• 本地3.3V至5V转换器
• 元件数最少的DC-DC转换器
• 便携式仪表与手持终端
• 从锂离子备用电池产生稳定的5V电压
• 远端数据采集系统
• 低压系统中MOSFET开关的驱动电压
• 2节电池至5V转换