Antminer L3+ U73 Step-Down Power Module DC Board LM27402S

Antminer L3+ U73 Step-Down Power Module – LM27402S Voltage Regulator (Green Version)

Restore the 10 V step-down rail on your Antminer L3+ hashboard with this green-PCB U73 replacement module. Built around the LM27402S synchronous buck controller, it replaces the damaged on-board power circuit and brings the voltage domain back to spec — getting your Scrypt miner hashing again without a full board swap.

Flexible 3-Wire or 4-Wire Installation

The module has 8 external solder joints: four connect directly to pads without wire bridges, and the remaining points accept either 3 wires (fixed voltage via PIC) or 4 wires (adjustable voltage via PIC), depending on your board revision and repair preference. An 8-step installation guide covers resistor removal, signal routing, and connection to the correct inductor and feedback pins on the hashboard.

Connection Pin-Out Reference

Solder points: GND, 12 V input, EN (power-on enable), HG & LG (MOS gate drives), DAOUT (PIC voltage adjustment), FB(mos) (inductor feedback), and SW(out) (switched output). Match each label to the silk-screen markings on your L3+ board before soldering.

L3+ U73 Green Module Specifications

Related L3+ Hashboard Repair Components

• L3+ U73 Step-Down Module (Black Version)
• LM27402S Switching Controller IC
• L3+/S9 14 V Boost Module (Green Version)
• L3+ Hashboard Test Fixture & Chip Scanner

Need L3+ repair modules in bulk? Contact us at contact@lys-sz.com for volume pricing and lead-time estimates.

Worldwide shipping from our Shenzhen warehouse.