Measure small currents without adding resistive insertion loss

In most cases, you measure current by converting it into a proportional voltage and then measuring the voltage. Figure 1 shows two typical methods of making the conversion. In one method, you insert a probing resistor, RP, in series with the current path and use differential amplifier IC1 to measure the resulting voltage drop (Figure 1a). A second method is a widely known operational amplifier current-to-vo ...

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LTC3118 – 18V, 2A Buck-Boost DC/DC Converter with Low-Loss Dual Input PowerPath

Features Integrated High Efficiency Dual Input PowerPath™ Plus Buck-Boost DC/DC Converter Ideal Diode or Priority VIN Select Modes VIN1 and VIN2 Range: 2.2V to 18V VOUT Range: 2V to 18V Either VIN Can Be Above, Below or Equal to VOUT Generates 5V at 2A for VIN > 6V 1.2MHz Low Noise Fixed Frequency Operation Current Mode Control All Internal N-Channel MOSFETs Pin-Selectable PWM or Burst Mode® Operation Ac ...

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