This series of digital laser drivres have all the valuable and important features, but are often difficult to achieve simultaneously such as: wide input and output voltage range, high output current capability, high efficiency, low output noise (but it has an output 6mVp-p ripple voltage at 500kHz), wide modulation bandwidth, and small size. The wide output voltage range, 0.1VVPS ~ 0.8VVPS, allows driving one or multiple serial laser diodes at the same time, for up to 5A and 15A of well controlled current at high efficiency.