LM2776DBVR

LM2776DBVR is the tape-and-reel SOT-23-6 ordering code for the Texas Instruments LM2776 inverting charge pump, listed as ACTIVE in the datasheet package option addendum with device marking 2776. It takes a 2.7 V to 5.5 V input and delivers the inverted rail at up to 200 mA, with a quiescent current of 100 µA typical, a 2 MHz switching frequency and efficiency above 90 % at working loads, over -40 °C to +85 °C. The selection point is a small negative rail without an inductor: op-amp and sensor bias, LCD contrast and GaAs or detector supplies generated from the same 3.3 V or 5 V rail that feeds the rest of the board. Selection advice: output resistance, not the 200 mA ceiling, sets the real load regulation of a charge pump - check the datasheet output-resistance curves at your load current and leave ripple headroom in the downstream analogue budget. Parameters verified against the TI LM2776 datasheet SNVSA56 (package option addendum and electrical characteristics).