LM27761DSGR

LM27761DSGR is the tape-and-reel WSON-8 ordering code for the Texas Instruments LM27761 switched-capacitor voltage inverter, listed as Active / Production in the datasheet package option addendum. From a 2.7 V to 5.5 V input it produces an adjustable -1.5 V to -5 V output at up to 250 mA, with a post-regulating LDO for low noise: quiescent current is 370 µA typical, shutdown current 7 µA typical, switching frequency 2 MHz typical, inverter output resistance 2.5 Ω at a 5 V input, LDO PSRR 35 dB typical at 2 MHz under an 80 mA load and LDO dropout of 30 mV at 100 mA with a -5 V output. The selection point is a quiet negative rail in a 2 mm by 2 mm footprint: bias supplies for op-amps, codecs and display drivers in portable and industrial equipment. Selection advice: the adjustable output is set against the internal reference with a divider, and the achievable negative voltage shrinks as load current rises, so verify the worst-case load point against the datasheet output-resistance figure. Parameters verified against the TI LM27761 datasheet SNVSA85 (package option addendum and electrical characteristics).