MAX768 - Maxim

MAX768 Low-Noise / Dual-Output / Regulated Charge Pump for GaAsFET / LCD / and VCO Supplies

The MAX768 low-noise, dual-output, regulated charge pump provides a negative output for biasing GaAsFET power amplifiers, and a positive output for powering voltage-controlled oscillators (VCOs) in wireless handsets. The outputs can also be used to power LCDs. Output ripple is less than 2mVp-p. The MAX768 is intended for use in low-voltage systems where a si.

Features

Dual Mode™ operation: the output voltage is preset to +5V and -5V, or can be adjusted by adding external resistor dividers. Other features include independent shutdowns and a logic output that signals when the negative voltage has risen to within 10% of its regulation setpoint (to protect the power amplifier GaAsFET). The MAX768 is available in a space-saving, 16-pin QSOP, which is the same size as a standard 8-pin SO. ____________________________Features o Dual Positive/Negative Regulated Outputs: ±5VOUT from 3VIN o Output-Ready Indicator to Protect GaAsFET PAs o 2.5V to 5.5V Input Voltage R.