LM2687是TI公司的一款电荷泵（无感应器）产品，LM2687是低噪声稳压开关电容器电压反向器，本页介绍了LM2687的产品说明、应用、特性等，并给出了与LM2687相关的TI元器件型号供参考。
LM2687 - 低噪声稳压开关电容器电压反向器 - 电荷泵（无感应器） - DC/DC开关稳压器 - TI公司（Texas Instruments，德州仪器）
The LM2687 CMOS Negative Regulated Switched Capacitor Voltage Inverter delivers a very low noise adjustable output for an input voltage in the range of +2.7V to +5.5V. Four low cost capacitors are used in this circuit to provide up to 10mA of output current. The regulated output for the LM2687 is adjustable between -1.5V and -5.2V. The LM2687 operates at 100 kHz (typical) switching frequency to reduce output resistance and voltage ripple. With an operating current of only 500 µA (charge pump power efficiency greater than 90% with most loads) and 0.05 µA typical shutdown current, the LM2687 provides ideal performance for cellular phone power amplifier bias and other low current, low noise negative voltage needs. The device comes in a small 8-pin MSOP or LLP package.
- Inverts and regulates the input supply voltage
- Small MSOP-8 or LLP-8 package
- 91% typical charge pump power efficiency at 10mA
- Low output ripple (1mV typical)
- Shutdown lowers Quiescent current to 0.05 µA (typical)
