LTC1551 Datasheet

Low Noise, Switched Capacitor Regulated Voltage Inverters


The LTC®1550/LTC1551 are switched capacitor charge pump voltage inverters which include internal linear post regulators 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.

■ Regulated Negative Voltage from a Single Positive Supply
■ Low Output Ripple: Less Than 1mVP-P Typ
■ High Charge Pump Frequency: 900kHz Typ
■ Small Charge Pump Capacitors: 0.1µF
■ Requires Only Four External Capacitors
■ Fixed – 4.1V or Adjustable Output
■ Shutdown Mode Drops Supply Current to < 1µA
■ High Output Current: Up to 10mA, VCC = 5V
■ Output Regulation: 5%
■ Available in SO-8 and 16-Lead SSOP

■ GaAs FET Bias Generators
■ Negative Supply Generators
■ Battery-Powered Systems
■ Single Supply Applications



Manufacturer information


 Linear Technology Corporation designs, manufactures and markets a broad line of standard high performance integrated circuits. Applications for the Company's products include telecommunications, cellular telephones, networking products, notebook and desktop computers, video/multimedia, industrial instrumentation, automotive electronics, factory automation, process control, and military and space systems. The Company's principal product categories include amplifiers, battery management, data converters, high frequency, interface, voltage regulators and voltage references

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