8-channel boost regulator for LCD backlight
The TPS61185RGET is a step-up (boost) DC-DC regulator with eight regulated current sinks, each delivering up to 25 mA, and a maximum output voltage of 38 V. Brightness control is handled through PWM dimming, and the switching frequency can be set between 600 kHz and 2 MHz, letting the designer optimise between inductor physical size and switching losses. The internal power switch is included, so the external BOM stays compact.
The input supply range spans 4.2 V to 24 V, covering single-cell Li-ion through industrial 24 V rails. The 24-VFQFN package with exposed pad (4x4 mm body) requires a thermal land pattern on the PCB to conduct heat away from the die.