LTC1550/LTC1551 Low Noise, Switched Capacitor Regulated Voltage Inverters FEATURES s s s s s s s s s s DESCRIPTION The LTC®1550/LTC1551 are switched capacitor charge pump voltage inverters which include internal linear postregulators to minimize output ripple.
Output voltages are fixed at – 4.
1V, with ripple voltages typically below 1mVP-P.
The LTC1550 is also available in an adjustable output voltage version.
The LTC1550/LTC1551 are ideal for use as bias voltage generators for GaAs transmitter FETs in portable RF and cellular telephone applications.
The LTC1550/LTC1551 operate from single 4.
5V to 6.
5V supplies and draw typical quiescent currents of 4.
25mA with a 5V supply.
Each device inc...

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