MAX844ISA PDF File ( Datasheet )

19-0388; Rev 1; 3, 96 UAL IT MAN TION K A ET U E L H A S EV TA WS DA FOLLO Low-Noise, Regulated, -2V GaAsFET Bias _______________General Description The MAX840, MAX843, MAX844 low-noise, inverting charge-pump power supplies are ideal for biasing GaAsFETs in cellular telephone transmitter amplifiers. They operate with inputs down to 2.5V. The MAX840 offers both a -2V preset output and a -0.5V to -9.4V adjustable output. The MAX843, MAX844 use an external positive control voltage to set the nega