The AS3691-MODULE is an ultra-small, 2.5 mm x 2.3 mm LED driver module from ams (formerly known as Austria Microsystems). It is a complete, ready-to-use solution that can drive up to 8 LEDs in series and can deliver up to 70 mA current with brightness control. It integrates the AS3691 LED driver and low-dropout linear regulator (LDO) into one ultra-small package. The device features a single-cell Li-ion battery input voltage, wide buck range (2.7 V to 6.5 V), adjustable output current, PWM dimming, and fast start up time. It is also compliant with the latest LED regulations across all major markets and supports various lighting modes such as linear dimming, blinking and color temperature management.