LTC1550LCMS8-4.1#PBF

LTC®1550L is a switched capacitor charge pump voltage inverter which includes internal linear post regulators to minimize output ripple. It is ideal for use as bias voltage generators for GaAs transmitter FETs in portable RF and cellular telephone applications. Only four external components are required: an input bypass capacitor, two 0.1µF charge pump capacitors and a filter capacitor at the linear regulator output. Typical applications are GaAs FET bias generators, negative supply generators, battery-powered systems, single supply applications.

• Regulated negative voltage from a single positive supply
• Fixed supply voltage is 4.1V (TA=25°C, VCC=2.7V to 5.25V, C1=CCP=0.1µF, COUT=10µF)
• Internal oscillator frequency is 900KHz typical
• Output ripple voltage is 1mV typical
• Output regulation range from –4.203 to –3.998V (4.5V ≤ VCC ≤ 5.25V, 0 ≤ IOUT ≤ 5mA)
• Output short-circuit current is 200mA (VOUT=0V, VCC=5.25V, TA=25°C, VCC=2.7V to 5.25V, C1=CCP=0.1µF)
• 8-lead plastic MSOP package
• Supply current is 7mA (VCC=5V, VSHDN=VCC/GND, TA=25°C. VCC=2.7V to 5.25V, C1=CCP=0.1µF, COUT=10µF)

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