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LM5113

NOT RECOMMENDED FOR NEW DESIGNS

1.2-A/5-A, 90-V half bridge gate driver for GaNFET

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Data sheet
LM5113 is not recommended for new designs
Although this product continues to be in production to support previous designs, we don't recommend it for new designs. Consider one of these alternates:
open-in-new Compare alternates
Drop-in replacement with upgraded functionality to the compared device
LM5113-Q1 ACTIVE Automotive 1.2-A/5-A, 100-V half bridge gate driver for GaNFET Automotive qualified
Pin-for-pin with same functionality to the compared device
LMG1205 ACTIVE 1.2-A, 5-A 90-V, half bridge gate driver with 5-V UVLO for GaNFET and MOSFET Same specifications, DSBGA package

LM5113

NOT RECOMMENDED FOR NEW DESIGNS
Data sheet Order now

Product details

Bootstrap supply voltage (max) (V) 107 Power switch GaNFET, MOSFET Input supply voltage (min) (V) 4.5 Input supply voltage (max) (V) 5.5 Peak output current (A) 5 Operating temperature range (°C) -40 to 125 Undervoltage lockout (typ) (V) 4 Rating Catalog Propagation delay time (µs) 0.03 Rise time (ns) 7 Fall time (ns) 3.5 Iq (mA) 0.15 Input threshold TTL Channel input logic TTL Switch node voltage (V) -5 Features Bootstrap supply voltage clamp, Split outputs on high and low side Driver configuration Dual, Independent
Bootstrap supply voltage (max) (V) 107 Power switch GaNFET, MOSFET Input supply voltage (min) (V) 4.5 Input supply voltage (max) (V) 5.5 Peak output current (A) 5 Operating temperature range (°C) -40 to 125 Undervoltage lockout (typ) (V) 4 Rating Catalog Propagation delay time (µs) 0.03 Rise time (ns) 7 Fall time (ns) 3.5 Iq (mA) 0.15 Input threshold TTL Channel input logic TTL Switch node voltage (V) -5 Features Bootstrap supply voltage clamp, Split outputs on high and low side Driver configuration Dual, Independent
DSBGA (YFX) 12 3.24 mm² 1.8 x 1.8 WSON (DPR) 10 16 mm² 4 x 4
  • Independent high-side and low-side
    TTL logic inputs
  • 1.2 A / 5 A peak source/sink current
  • High-side floating bias voltage rail
    Operates up to 100 VDC
  • Internal bootstrap supply voltage clamping
  • Split outputs for adjustable
    turnon/turnoff strength
  • 0.6-Ω / 2.1-Ω pulldown/pullup resistance
  • Fast propagation times (28 ns typical)
  • Excellent propagation delay matching
    (1.5 ns typical)
  • Supply rail undervoltage lockout
  • Low power consumption
  • Independent high-side and low-side
    TTL logic inputs
  • 1.2 A / 5 A peak source/sink current
  • High-side floating bias voltage rail
    Operates up to 100 VDC
  • Internal bootstrap supply voltage clamping
  • Split outputs for adjustable
    turnon/turnoff strength
  • 0.6-Ω / 2.1-Ω pulldown/pullup resistance
  • Fast propagation times (28 ns typical)
  • Excellent propagation delay matching
    (1.5 ns typical)
  • Supply rail undervoltage lockout
  • Low power consumption

The LM5113 device is designed to drive both the high-side and the low-side enhancement mode Gallium Nitride (GaN) FETs in a synchronous buck or a half bridge configuration. The floating high-side driver is capable of driving a high-side enhancement mode GaN FET operating up to 100 V. The high-side bias voltage is generated using a bootstrap technique and is internally clamped at 5.2 V, which prevents the gate voltage from exceeding the maximum gate-source voltage rating of enhancement mode GaN FETs. The inputs of the LM5113 are TTL logic compatible, and can withstand input voltages up to 14 V regardless of the VDD voltage. The LM5113 has split gate outputs, providing flexibility to adjust the turnon and turnoff strength independently.

The LMG1205 is an enhancement over the LM5113. The LMG1205 takes the design of the LM5113 and includes start-up logic, level shifter, and power-off Vgs clamp enhancements to provide a more robust solution.

In addition, the strong sink capability of the LM5113 maintains the gate in the low state, preventing unintended turnon during switching. The LM5113 can operate up to several MHz. The LM5113 is available in a standard WSON-10 pin package and a 12-bump DSBGA package. The WSON-10 pin package contains an exposed pad to aid power dissipation. The DSBGA package offers a compact footprint and minimized package inductance.

The LM5113 device is designed to drive both the high-side and the low-side enhancement mode Gallium Nitride (GaN) FETs in a synchronous buck or a half bridge configuration. The floating high-side driver is capable of driving a high-side enhancement mode GaN FET operating up to 100 V. The high-side bias voltage is generated using a bootstrap technique and is internally clamped at 5.2 V, which prevents the gate voltage from exceeding the maximum gate-source voltage rating of enhancement mode GaN FETs. The inputs of the LM5113 are TTL logic compatible, and can withstand input voltages up to 14 V regardless of the VDD voltage. The LM5113 has split gate outputs, providing flexibility to adjust the turnon and turnoff strength independently.

The LMG1205 is an enhancement over the LM5113. The LMG1205 takes the design of the LM5113 and includes start-up logic, level shifter, and power-off Vgs clamp enhancements to provide a more robust solution.

In addition, the strong sink capability of the LM5113 maintains the gate in the low state, preventing unintended turnon during switching. The LM5113 can operate up to several MHz. The LM5113 is available in a standard WSON-10 pin package and a 12-bump DSBGA package. The WSON-10 pin package contains an exposed pad to aid power dissipation. The DSBGA package offers a compact footprint and minimized package inductance.
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Technical documentation

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Type Title Date
* Data sheet LM5113 80-V, 1.2-A, 5-A, Half Bridge GaN Driver datasheet (Rev. I) PDF | HTML 28 Oct 2019
EVM User's guide AN-2149 LM5113 Evaluation Board User's Guide (Rev. B) PDF | HTML 27 Mar 2024
Application brief Key Parameters and Driving Requirements of GaN FETs PDF | HTML 04 Aug 2022
Application brief Nomenclature, Types, and Structure of GaN Transistors PDF | HTML 04 Aug 2022
Application brief How GaN Enables More Efficient and Reduced Form Factor Power Supplies PDF | HTML 02 Aug 2022
Selection guide Power Management Guide 2018 (Rev. R) 25 Jun 2018
Application note Design Considerations for LMG1205 Advanced GaN FET Driver During High-Frequency (Rev. A) 30 May 2018
Technical article Create a power supply for an MRI application PDF | HTML 14 Aug 2017
White paper A comprehensive methodology to qualify the reliability of GaN products 02 Mar 2015
White paper GaN power module performance advantage in DC/DC converters 02 Mar 2015
White paper Advancing Power Supply Solutions Through the Promise of GaN 24 Feb 2015
More literature LM5113 Prod Brief - 5A, 100V Half-Brdge Gate Drvr for Enhancement-Mode GaN FETs 17 Jun 2011

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