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LMG708B0-EVM12V

LMG708B0 12V, 20A, GaN buck converter evaluation module

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LMG708B0-EVM12V

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Overview

The LMG708B0-EVM12V evaluation module (EVM) is designed to showcase the LMG708B0 GaN synchronous buck converter. The EVM operates over an input voltage range of 24V to 72V to deliver a 12V regulated output at up to 20A.

Features
  • Maximum input voltage of 72V
    • VIN UVLO thresholds set at 21V (on), 19V (off)
  • Regulated output voltage of 12V rated at 20A
  • GaN buck converter enables ultra-high efficiency
    • 97% at 48VIN, 12VOUT, 20A, 400kHz
    • Low dead-time switching minimizes power loss and temperature rise
    • Bias power derived from the 12V output
  • Switching frequency of 400kHz synchronizable ±20% with an external clock signal
  • Input π-stage EMI filter helps meet CISPR 32
    • Spread spectrum (DRSS) option for lower electromagnetic interference (EMI)
    • Electrolytic capacitor for parallel damping
  • Peak current-mode control architecture provides fast line and load transient response
    • Optional constant-current (CC) loop with adjustable setpoint (ISET) and seamless transition between CV and CC modes
    • Forced PWM (FPWM) or pulsed frequency modulation (PFM) modes of operation
  • Integrated protection features for robust design
    • Overcurrent protection (OCP) with low-loss shunt current sensing
    • Monotonic prebias output voltage start-up
    • Internal soft-start time set to 2.75ms, adjustable with the VSET input
    • Power-good (PG) indicator
    • Current monitor (IMON) output
  • Fully assembled, tested and proven PCB layout with 3.9" × 2.5" (99mm × 63mm) total footprint
AC/DC & DC/DC converters (integrated FET)
LMG708B0 — 5V to 80V, 20A synchronous step-down converter with integrated GaN FETs for ultra-high efficiency
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Evaluation board

LMG708B0-EVM12V — LMG708B0 12V, 20A, GaN buck converter evaluation module

Supported products & hardware

LMG708B0-EVM12V — LMG708B0 12V, 20A, GaN buck converter evaluation module

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Certificate LMG708B0-EVM12V EU Declaration of Conformity (DoC) Sep 19, 2025

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