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LMG5126

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2.5MHz 42V wide-VIN synchronous GaN boost converter with output voltage tracking

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Data sheet

LMG5126

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Data sheet Order now

Product details

Rating Catalog Operating temperature range (°C) -40 to 125 Topology Boost Type Converter (Integrated Switch) Vin (min) (V) 2.5 Vin (max) (V) 42 Switching frequency (min) (kHz) 0.3 Switching frequency (max) (kHz) 2.5 Features Adjustable current limit, Adjustable soft start, Adjustable switching frequency, Analog current monitor, Automatic Light Load Management, Bypass Mode, Chip-enable control pin, Cycle-by-cycle overcurrent protection, External Sync, Forced PWM, Overcurrent protection with adjustable delay, Power good, Programmable dead time, Spread Spectrum, Tracking Control mode current mode control Vout (min) (V) 6 Vout (max) (V) 60 Iq (typ) (µA) 1100 Duty cycle (max) (%) 97
Rating Catalog Operating temperature range (°C) -40 to 125 Topology Boost Type Converter (Integrated Switch) Vin (min) (V) 2.5 Vin (max) (V) 42 Switching frequency (min) (kHz) 0.3 Switching frequency (max) (kHz) 2.5 Features Adjustable current limit, Adjustable soft start, Adjustable switching frequency, Analog current monitor, Automatic Light Load Management, Bypass Mode, Chip-enable control pin, Cycle-by-cycle overcurrent protection, External Sync, Forced PWM, Overcurrent protection with adjustable delay, Power good, Programmable dead time, Spread Spectrum, Tracking Control mode current mode control Vout (min) (V) 6 Vout (max) (V) 60 Iq (typ) (µA) 1100 Duty cycle (max) (%) 97
VQFN-FCRLF (VBT) 22 24.75 mm² 5.5 x 4.5
  • Input voltage 6.5V to 42V
    • Minimum 2.5V for V(BIAS) ≥ 6.5V or VOUT ≥ 6V
  • Output Voltage 6V to 60V
    • 2% accuracy, internal feedback resistors
    • Bypass operation for VI > VOUT
      • Boot refresh out of audio >20kHz
    • Dynamic output voltage tracking
      • Digital PWM tracking (DTRK)
      • Analog tracking (ATRK)
    • Over voltage protection (65V, 50V, 35V, 25V)
  • Low shutdown ISD of 50µA typ. (200uA max.)
  • Low operating IQ of 1.1mA typ. (2.5mA max.)
  • Stacking with interleaved multiphase operation
    • Up to 4-devices without external clock
  • Switching frequency from 300kHz to 2.5MHz
    • Syncronization to external clock (SYNCIN)
    • Spread Spectrum (DRSS)
  • Dynamically selectable switching modes (FPWM, Diode emulation)
  • Current sense resistor or DCR sensing
  • Average inductor current monitor
  • Average input current limit
  • Selectable current limit (30mV or 60mV)
  • Selectable delay time (DLY)
  • Power good indicator
  • Programmable VI undervoltage lockout (UVLO)
  • Lead-less RLF-22 package with wettable flanks
  • Input voltage 6.5V to 42V
    • Minimum 2.5V for V(BIAS) ≥ 6.5V or VOUT ≥ 6V
  • Output Voltage 6V to 60V
    • 2% accuracy, internal feedback resistors
    • Bypass operation for VI > VOUT
      • Boot refresh out of audio >20kHz
    • Dynamic output voltage tracking
      • Digital PWM tracking (DTRK)
      • Analog tracking (ATRK)
    • Over voltage protection (65V, 50V, 35V, 25V)
  • Low shutdown ISD of 50µA typ. (200uA max.)
  • Low operating IQ of 1.1mA typ. (2.5mA max.)
  • Stacking with interleaved multiphase operation
    • Up to 4-devices without external clock
  • Switching frequency from 300kHz to 2.5MHz
    • Syncronization to external clock (SYNCIN)
    • Spread Spectrum (DRSS)
  • Dynamically selectable switching modes (FPWM, Diode emulation)
  • Current sense resistor or DCR sensing
  • Average inductor current monitor
  • Average input current limit
  • Selectable current limit (30mV or 60mV)
  • Selectable delay time (DLY)
  • Power good indicator
  • Programmable VI undervoltage lockout (UVLO)
  • Lead-less RLF-22 package with wettable flanks

The LMG5126 is a stackable multiphase synchronous boost converter. The device provides a regulated output voltage for lower or equal input voltage also supporting VI to VOUT bypass mode to save power. Up to 4 devices can be stacked with or without external clock.

VOUT can be dynamically programmed using the digital or analog ATRK/DTRK function. VI can be as low as 2.5V after startup as the internal VCC supply is automatically switched from VBIAS to VOUT for VBIAS < 6.5V. The fixed switching frequency is set between 300kHz and 2.5MHz via a resistor on the RT-pin or the SYNCIN clock. The switching modes FPWM or Diode emulation can be changed during operation.

The implemented protections peak current limit, average input current limit, average inductor current monitor, over- and undervoltage protection or the thermal shutdown protect the device and the application.

The LMG5126 is a stackable multiphase synchronous boost converter. The device provides a regulated output voltage for lower or equal input voltage also supporting VI to VOUT bypass mode to save power. Up to 4 devices can be stacked with or without external clock.

VOUT can be dynamically programmed using the digital or analog ATRK/DTRK function. VI can be as low as 2.5V after startup as the internal VCC supply is automatically switched from VBIAS to VOUT for VBIAS < 6.5V. The fixed switching frequency is set between 300kHz and 2.5MHz via a resistor on the RT-pin or the SYNCIN clock. The switching modes FPWM or Diode emulation can be changed during operation.

The implemented protections peak current limit, average input current limit, average inductor current monitor, over- and undervoltage protection or the thermal shutdown protect the device and the application.
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* Data sheet LMG5126 Wide-Input, 2.5MHz, Boost Converter datasheet PDF | HTML 06 Dec 2024
EVM User's guide LMG5126-Q1 Boost Converter Evaluation Module User's Guide PDF | HTML 05 Dec 2024

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Evaluation board

LMG5126EVM — LMG5126 evaluation module

The LMG5126 evaluation module (EVM) showcases the features and performance of the LMG5126 wide input voltage synchronous GaN boost converter. This EVM is designed for ease of configuration, enabling the user to evaluate many different applications on the same module. The standard configuration is (...)
User guide: PDF | HTML
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