ETA8120S2G CMBc Step-Down Regulator for Whatsminer CB6 V10 Control Board
Couldn't load pickup availability
Have questions about this product? Our team is here to help — just reach out on WhatsApp.
💬 Contact Us on WhatsAppAbout the Product
ETA8120S2G CMBc DC-DC Step-Down Switching Regulator | Whatsminer CB6 V10 Control Board
The ETA8120S2G CMBc is a high-frequency DC-DC step-down switching regulator integrated into the Whatsminer CB6 V10 control board — and a critical line-replaceable IC when the board's power rails fail. Designed to deliver exceptional efficiency and performance, this regulator accepts a wide 4.2V to 18V input range, making it suitable for the mixed-voltage rails inside crypto-miner control boards and adjacent power architectures.
Identifiable by its silk-screen mark CM** in the SOT23-6 package, the ETA8120S2G uses a current-mode PWM-controlled converter with a fixed switching frequency of 500kHz. That combination enables small external components, simple compensation, and high efficiency even at light loads where the regulator falls back to PFM mode automatically.
Wide Input Range, High Efficiency, and Compact Size for Optimal Performance
Built-in thermal shutdown and UVLO (under-voltage lockout) protections keep the regulator stable through the abnormal conditions common in mining-environment power rails — high ambient heat, dirty input voltages, surge events. The current-mode control scheme makes loop response predictable, and external compensation is not required, which keeps the board layout tight and the BoM short.
ETA8120S2G Use Cases
While the primary application is the Whatsminer CB6 V10 control board, the same SOT23-6 part also lands in LCD TV, set-top box, and portable TV power rails — anywhere a designer needs a 2A step-down rail with minimal external components. Repair shops keeping ETA8120S2G in stock can cover both crypto-miner control board rework and adjacent consumer-electronics service work from the same drawer.
ETA8120S2G Step-Down Switching Regulator Features
| Feature | Details |
|---|---|
| Input Voltage Range | 4.2V-18V |
| Output Current Capability | Up to 2A |
| Control Scheme | Current mode control |
| Switching Frequency | Fixed at 500kHz |
| Efficiency at Light Loads | High-efficiency PFM mode |
| External Compensation | Not required |
| Protection Features | Thermal shutdown and UVLO |
| Package | SOT23-6 |
Related products
- Whatsminer CB4 V10 H6 Control Board
- Whatsminer CB2 V8 H3 Control Board (M20/M21)
- Whatsminer H6 / H6OS BGA Reballing Stencil
- Whatsminer M60 / M50 / M30 Hash Board Tester
Whatsminer repair benches ordering ETA8120S2G in tray quantities can email contact@lys-sz.com for bulk pricing and matched control-board kits. Worldwide shipping from our Shenzhen warehouse.
Buying in bulk for a mining farm or repair shop?
Get dedicated B2B pricing on this part and across our full catalog — quote response within 24 hours, payment by T/T USD bank wire, and DDP delivery available for US & EU customers (and other lanes on request).
