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LMG708B0-EVM12V

LMG708B0 12Vout, 20A, 400kHz, single-phase 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 65V to deliver a 12V regulated output at up to 20A.

Features
  • Maximum input voltage of 65V
    • 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
DC/DC converters
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

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

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Calculation tool

LMG708B0-CALC — LMG708B0 GaN buck converter quickstart calculator

Supported products & hardware

Supported products & hardware

Products
DC/DC converters
LMG708B0 — 5V to 80V, 20A synchronous step-down converter with integrated GaN FETs for ultra-high efficiency
Hardware development
Reference design
PMP23595 — 48VIN, 960W four-phase buck converter with integrated GaN reference design
Evaluation board
LMG708B0-EVM12V — LMG708B0 12Vout, 20A, 400kHz, single-phase GaN buck converter evaluation module LMG708B0-EVM2PH — LMG708B0 12V, 40A, 400kHz, two-phase GaN buck converter evaluation module
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LMG708B0-CALC — LMG708B0 GaN buck converter quickstart calculator

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Version: A1
Release date: Apr 22, 2026
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LMG708B0_quickstart_calculator_revA.xlsm  — 3240 K

LMG708B0 GaN buck converter quickstart calculator

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Products
DC/DC converters
LMG708B0 — 5V to 80V, 20A synchronous step-down converter with integrated GaN FETs for ultra-high efficiency
Hardware development
Reference design
PMP23595 — 48VIN, 960W four-phase buck converter with integrated GaN reference design
Evaluation board
LMG708B0-EVM12V — LMG708B0 12Vout, 20A, 400kHz, single-phase GaN buck converter evaluation module LMG708B0-EVM2PH — LMG708B0 12V, 40A, 400kHz, two-phase GaN buck converter evaluation module

Release Information

Welcome to the quickstart design tool for the LMG708B0 80V GaN synchronous buck converter family. This standalone tool facilitates and assists the power supply engineer with the design of a DC/DC buck regulator using this converter family. As such, the user can expeditiously arrive at an optimized design to meet the application requirements.
Certification

LMG708B0-EVM12V-DOC-CERT — LMG708B0-EVM12V EU Declaration of Conformity (DoC)

Supported products & hardware

Supported products & hardware

Hardware development
Evaluation board
LMG708B0-EVM12V — LMG708B0 12Vout, 20A, 400kHz, single-phase GaN buck converter evaluation module
Download options

LMG708B0-EVM12V-DOC-CERT — LMG708B0-EVM12V EU Declaration of Conformity (DoC)

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Version: 1.0
Release date: Mar 31, 2026
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Hardware development
Evaluation board
LMG708B0-EVM12V — LMG708B0 12Vout, 20A, 400kHz, single-phase GaN buck converter evaluation module

Documentation

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DoC_EU_RoHS_LMG708B0-EVM12V.pdf

LMG708B0-EVM12V EU Declaration of Conformity (DoC)

Release Information

Initial release of RoHS Declaration of Conformity (DoC) for the LMG708B0-EVM12V
TI's Standard Terms and Conditions for Evaluation Items apply.

Technical documentation

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Top documentation Type Title Format options Date
* EVM User's guide LMG708B0 12VOUT, 20A, 400kHz, Single-Phase GaN Buck Converter Evaluation Module (Rev. A) PDF | HTML Apr 27, 2026
Certificate LMG708B0-EVM12V EU Declaration of Conformity (DoC) Sep 19, 2025

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