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MAX828：开关电容电压反相器

无电感电源，用于寻呼LCD

The ultra-small MAX828/MAX829 monolithic, CMOS charge-pump inverters accept input voltages ranging from +1.5V to +5.5V. The MAX828 operates at 12kHz, and the MAX829 operates at 35kHz. Their high efficiency (greater than 90% over most of the load-current range) and low operating current (60µA for the MAX828) make these devices ideal for both battery-powered and board-level voltage-conversion applications. The MAX828/MAX829 combine low quiescent current and high efficiency. Oscillator control circuitry and four power MOSFET switches are included on-chip. Applications include generating a -5V supply from a +5V logic supply to power analog circuitry. Both parts come in a 5-pin SOT23-5 package and can deliver 25mA with a voltage drop of 500mV. For a similar device with logic-controlled shutdown, refer to the MAX1719/MAX1720/MAX1721. For applications requiring more power, the MAX860 delivers up to 50mA with a voltage drop of 600mV, in a space-saving µMAX® package.

关键特性 5-Pin SOT23-5 Package 95% Voltage Conversion Efficiency Inverts Input Supply Voltage 60µA Quiescent Current (MAX828) +1.5V to +5.5V Input Voltage Range Requires Only Two Capacitors 25mA Output Current

MAX828、MAX829：典型工作电路 应用 电池供电应用 蜂窝电话 手持终端、PDA 医疗仪器 小型LCD板

数据手册DataSheet

关键参数

技术资料

• Tiny Charge Pump Provides Highly Reliable Low-Cost Solution to Negative Reference Voltage
• Choosing the Right Power-Supply IC for your Application
• DC-DC Conversion Without Inductors

质量和环境数据

• MAX828.pdf

相关产品

• MAX860：50mA、频率可选的开关电容电压变换器

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