Ultra-High CMTI Isolated Gate Drivers

Integrated Isolation with High CMTI to Improve Robustness for SiC Gate Driver

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The MAX22700–MAX22702 are a family of single-channel isolated gate drivers with ultra-high common-mode transient immunity (CMTI) of 300kV/μs (typ). The devices are designed to drive silicon-carbide (SiC) or gallium-nitride (GaN) transistors in various inverter or motor control applications. All devices have integrated digital galvanic isolation using Maxim’s proprietary process technology. The devices feature variants with output options for gate driver common pin GNDB (MAX22700), Miller clamp (MAX22701), and adjustable undervoltage-lockout UVLO (MAX22702). In addition, variants are offered as differential (D versions) or single-ended (E versions) inputs. These devices transfer digital signals between circuits with different power domains. All of the devices in the family feature isolation for a withstand voltage rating of 3kVRMS for 60 seconds.

All devices support a minimum pulse width of 20ns with a maximum pulse width distortion of 2ns. The part-to-part propagation delay is matched within 2ns (max) at +25°C ambient temperature, and 5ns (max) over the -40°C to +125°C operating temperature range. This feature reduces the power transistor’s dead time, thus improving overall efficiency.

The MAX22700 and the MAX22702 have a maximum RDSON of 1.25Ω for the low-side driver, and the MAX22701 has an RDSON of 2.5Ω for the low-side driver. All devices have a maximum RDSON of 4.5Ω for the high-side driver. See the Ordering Information for suffixes associated with each option.

The MAX22700–MAX22702 can be used to drive SiC or GaN FETs with different output gate drive circuitry and B-side supply voltages. See the Typical Operating Circuits for details.

All of the devices in the MAX22700–MAX22702 family are available in an 8-pin, narrow-body SOIC package with 4mm of creepage and clearance. The package material has a minimum comparative tracking index (CTI) of 600V, which gives it a group I rating in creepage tables. All devices are rated for operation at ambient temperatures of -40°C to +125°C.

Design Solution: Choose a High CMTI Gate Driver That Cuts Your SiC Switch Dead-Time ›

MAX22700D, MAX22700E, MAX22701D, MAX22701E, MAX22702D, MAX22702E: Functional Diagrams MAX22700D, MAX22700E, MAX22701D, MAX22701E, MAX22702D, MAX22702E: Functional Diagrams Enlarge+

Key Features

  • Matching Propagation Delay
    • 20ns Minimum Pulse Width
    • 35ns Propagation Delay at Room Temperature
    • 2ns Part-to-Part Propagation Delay Matching at Room Temperature
    • 5ns Part-to-Part Propagation Delay Matching over -40°C to +125°C Temperature Range
  • High CMTI (300kV/μs, typ)
  • Robust Galvanic Isolation
    • Withstands 3kVRMS for 60s (VISO)
    • Continuously Withstands 848VRMS (VIOWM)
    • Withstands ±5kV Surge Between GNDA and VSSB with 1.2/50μs Waveform
  • Precision UVLO
  • Options to Support a Broad Range of Applications
    • 3 Output Options: GNDB, Miller Clamp, or Adjustable UVLO
    • 2 Input Configurations: Single-Ended with Enable (E versions) or Differential (D versions)


  • Isolated Gate Driver for Inverters
  • Motor Drives
  • UPS and PV Inverters

See parametric specs for Isolated Gate Drivers (2)

Part NumberChannelsInputsPeak Output Current
Insulation RatingCMTI
UVLO Threshold
Oper. Temp.
typtypSee Notes
MAX22701E 1Single-Ended33000VRMS30013-40 to +125
SOIC (N)/8
$1.78 @1k
MAX22701E 3
SOIC (N)/8
$1.78 @1k
MAX22701E 3
SOIC (N)/8
$1.78 @1k
MAX22702E 5
SOIC (N)/8
$1.69 @1k

Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

MAX22701EVKIT: Evaluation Kit for the MAX22700D, MAX22700E, MAX22701D, MAX22701E, MAX22702D, MAX22702E
MAX22702EVKIT: Evaluation Kit for the MAX22700D, MAX22700E, MAX22701D, MAX22701E, MAX22702D, MAX22702E
Request Reliability Report for: MAX22702E 
Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C   Material Composition  

Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

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