2× input voltage — the fixed-ratio charge pump
The LM2765M6X/NOPB is a charge pump IC from Texas Instruments that delivers a fixed output voltage equal to twice the input voltage (2Vin). This ratiometric topology means the output tracks the input rail — if the input is 3.3 V, the output is 6.6 V; at 5 V input, the output is 10 V. No external inductor is needed; the charge pump uses only flying capacitors and an output capacitor. Rated for 20 mA output current, this part is sized for low-current auxiliary rails — biasing op-amps, powering small analog front-ends, or generating a local supply for a sensor bridge where a separate regulator would take up too much board area.
50 kHz switching — low noise, small footprint
The internal oscillator runs at 50 kHz, which keeps switching noise well below the AM radio band and simplifies EMI filtering. The trade-off is that the output capacitor needs to be sized for the 20 µs charge-transfer cycle — a 1 µF ceramic typically works for the 20 mA load, but the capacitor ESR and ripple rating should be checked against the peak charge current. Housed in a SOT-23-6 package, the LM2765M6X/NOPB occupies roughly 3 mm² of board area. No synchronous rectifier is used — the charge pump relies on diode drops for the output stage, so efficiency drops at higher load currents.
Active production — industrial temperature range
RoHS3 compliant.