LM2787

LM2787 Description

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LM2787 Datasheet (PDF)

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LM2787 Features

• Inverts and regulates the input supply voltage
• Small 8-Bump micro SMD and thin micro SMD packages
• 91% typical charge pump power efficiency at 10mA
• Low output ripple
• Shutdown lowers Quiescent current to 0.05 ľA (typical)

LM2787 Description

The LM2787 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 LM2787 is adjustable between -1.5V and -5.2V. The LM2787 operates at 260 kHz (typical) switching frequency to reduce output resistance and voltage ripple. With an operating current of only 400 ľA (charge pump power efficiency greater than 90% with most loads) and 0.05 ľA typical shutdown current, the LM2787 provides ideal performance for cellular phone power amplifier bias and other low current, low noise negative voltage needs. The device comes in small 8-Bump micro SMD and thin micro SMD packages.

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