Boost regulator for LED backlight strings
The TPS61158DRVR is a DC DC boost regulator from Texas Instruments, purpose-built for driving LED backlight strings in small to medium displays. It integrates the switching FET internally, so the external BOM stays tight — just the inductor, diode, and a couple of capacitors. The part switches at 750 kHz, which lets you use a smaller inductor than a lower-frequency boost would need, keeping the board area down. Output voltage adjusts from 2.7 V up to 29 V, covering single-LED to multi-series strings. PWM dimming input is on the pinout, so the host controller can vary brightness directly without an external DAC or PWM generator. The single output channel delivers up to 30 mA — typical for a notebook or monitor backlight LED rail.
Package and footprint for rework
Housed in a 6-WDFN with exposed pad, 2 mm × 2 mm body (6-WSON supplier device package). No lab bench needed for rework: a standard hot-air station with a fine nozzle handles the 6-pin DFN, and the pad marking on the package is clear enough to get orientation right the first time.