LM2780TP ,Ultra-Low Ripple Switched Capacitor Voltage InverterPin DescriptionPin Name DescriptionA1 C2+ Secondary flying-capacitor connectionB1 V Input voltage. ..
LM2787BP ,Low Noise Regulated Switched Capacitor Voltage Inverter in micro SMDFeaturesn Inverts and regulates the input supply voltageTheLM2787CMOSNegativeRegulatedSwitchedCapac ..
LM2787BPX ,Low Noise Regulated Switched Capacitor Voltage Inverter in micro SMDPin DescriptionsPin No. Name FunctionA1 Cap+ Positive terminal for C .1B1 V Positive power supply i ..
LM2787TPX ,Low Noise Regulated Switched Capacitor Voltage Inverter in micro SMDPin DescriptionsPin No. Name FunctionA1 Cap+ Positive terminal for C .1B1 V Positive power supply i ..
LM2787TPX ,Low Noise Regulated Switched Capacitor Voltage Inverter in micro SMDLM2787 Low Noise Regulated Switched Capacitor Voltage Inverter in micro SMDApril 2003LM2787Low Nois ..
LM2788MM-1.5 ,120mA High Efficiency Step-Down Switched Capacitor Voltage ConverterPin DescriptionPin Name Description1V Regulated Output VoltageOUT2 C1- First Flying Capacitor: Nega ..
LM61BIM3X ,2.7V, SOT-23 or TO-92 Temperature SensorFeaturesn Calibrated linear scale factor of +10 mV/˚C j Nonlinearity ±0.8˚C (max)n Rated for full − ..
LM61BIM3X ,2.7V, SOT-23 or TO-92 Temperature Sensorapplicationsn UL Recognized ComponentTypical Application01289702V = (+10 mV/˚C x T ˚C) + 600 mVOTem ..
LM61BIM3X ,2.7V, SOT-23 or TO-92 Temperature SensorApplicationsn Cellular PhonesThe LM61 is a precision integrated-circuit temperature sen-sor that ca ..
LM61BIZ ,2.7V, SOT-23 or TO-92 Temperature SensorLM61 2.7V, SOT-23 or TO-92 Temperature SensorFebruary 2004LM612.7V, SOT-23 or TO-92 Temperature Sen ..
LM61CIM3 ,2.7V, SOT-23 or TO-92 Temperature SensorApplicationsn Cellular PhonesThe LM61 is a precision integrated-circuit temperature sen-sor that ca ..
LM61CIM3X/NOPB ,?2?C Analog Output Temperature Sensor with TO-92 Option 3-SOT-23 -30 to 100Maximum Ratings may cause permanent damage to the device. These are stress ratingsonly, which do no ..
LM2780TP
Ultra-Low Ripple Switched Capacitor Voltage Inverter
LM2780
Ultra-Low Ripple Switched Capacitor Voltage Inverter
General DescriptionThe LM2780isa charge pump that invertsan input voltage the rangeof 1.8Vto 5.5Vto the corresponding output
voltageof -1.8Vto -5.5V. With useof threeor four low-cost
external ceramic capacitors,the LM2780 can provideupto
50mAof output current.
The LM2780 operatesata 12kHz typical switching fre-
quencyto minimize supply current (60µA typ.). Two charge
pumps operate 180˚ outof phaseto significantly reduce the
output voltage ripple comparedto thatof traditional single-
phase charge pump circuits.If larger output ripple canbe
tolerated, optional capacitor C2 maybe omittedto reduce
the cost and sizeofthe solution. The LM2780is availablein 8-pin Micro SMD chip-scale package.
See also: LM2781,a fast clock (210kHz typ) versionof this
topology with even lower output voltage ripple.
Features Inverts Input Voltage Ultra-Low Voltage Ripple and8Ω Typical Output
Resistance with Two Flying Capacitors Output Resistanceof 18Ω Using One Flying Capacitor 12kHz (typ.) Switching Frequency 8-pin micro SMD Package (1.4mmx 1.4mmx 0.5mm)
Applications Cellular Phones Pagers PDAs Op-Amp Power Supplies Interface Power Supplies Handheld Instruments
Typical Application CircuitMarch 2003
LM2780
Ultra-Low
Ripple
Switched
Capacitor
oltage
Inverter
