Digital controllers integrated with traditional discrete drivers and MOSFET structures can complete a multi-phase VR solution with minimal external components. It can be used in many different applications, such as desktop cores and data centers. Digital controllers with 1000+ test items include high frequency items (20MHz), high voltage accuracy items (1~3mV) and high pin counts (45-60 pins). This presentation will introduce the advantages of the ETS-800 for testing digital products, specifically how achieving better performance for test time, DIB design and cost of test.