LTC3722 - Synchronous Dual Mode Phase Modulated Full Bridge Controllers


  • Adaptive or Manual Delay Control for Zero Voltage Switching Operation
  • Adjustable Synchronous Rectification Timing for Highest Efficiency
  • Adjustable Maximum ZVS Delay
  • Adjustable System Undervoltage Lockout Hysteresis
  • Programmable Leading Edge Blanking
  • Very Low Start-Up and Quiescent Currents
  • Current Mode (LTC3722-1) or Voltage Mode (LTC3722-2) Operation
  • Programmable Slope Compensation
  • VCC UVLO and 25mA Shunt Regulator
  • 50mA Output Drivers
  • Soft-Start, Cycle-by-Cycle Current Limiting and Hiccup Mode Short-Circuit Protection
  • 5V, 15mA Low Dropout Regulator
  • 24-Pin Surface Mount GN Package

Typical Application

LTC3722 Typical Application
LTC3722 Typical Application


The LTC3722-1/LTC3722-2 phase-shift PWM controllers provide all of the control and protection functions necessary to implement a high efficiency, zero voltage switched (ZVS), full bridge power converter. Adaptive ZVS circuitry delays the turn-on signals for each MOSFET independent of internal and external component tolerances. Manual delay set mode enables secondary side control operation or direct control of switch turn-on delays.

The LTC3722-1/LTC3722-2 feature adjustable synchronous rectifier timing for optimal efficiency. A UVLO program input provides accurate system turn-on and turn-off voltages. The LTC3722-1 features peak current mode control with programmable slope compensation and leading edge blanking, while the LTC3722-2 employs voltage mode control.

The LTC3722-1/LTC3722-2 feature extremely low operating and start-up currents. Both devices include a full range of protection features and are available in the 24-pin surface mount GN package.


CAD Symbols and Footprints: The downloadable Zip file below contains the schematic symbol and PCB footprints.

For complete and up to date package information and drawings, please refer to our packaging page

Part Number Package Code Temp Package
LTC3722EGN-1#PBF SSOP-24 GN E 05-08-1641 (GN24) Yes
LTC3722EGN-1#TRPBF SSOP-24 GN E 05-08-1641 (GN24) Yes
LTC3722EGN-2#PBF SSOP-24 GN E 05-08-1641 (GN24) Yes
LTC3722EGN-2#TRPBF SSOP-24 GN E 05-08-1641 (GN24) Yes
LTC3722HGN-1#PBF SSOP-24 GN H 05-08-1641 (GN24) Yes
LTC3722HGN-1#TRPBF SSOP-24 GN H 05-08-1641 (GN24) Yes
LTC3722IGN-1#PBF SSOP-24 GN I 05-08-1641 (GN24) Yes
LTC3722IGN-1#TRPBF SSOP-24 GN I 05-08-1641 (GN24) Yes
LTC3722IGN-2#PBF SSOP-24 GN I 05-08-1641 (GN24) Yes
LTC3722IGN-2#TRPBF SSOP-24 GN I 05-08-1641 (GN24) Yes

LTC3722 Package Drawing
LTC3722 Package Drawing

Order Info

  • Part numbers ending in PBF are lead free. Solder plated terminal finish (SnPb) versions are non-standard and special terms and conditions and pricing applies if available. Please contact LTC marketing for information.
  • Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
  • Please refer to our general ordering information or the product datasheet for more details

Package Variations and Pricing

Part Number Package Temp Price
LTC3722EGN-1#PBF SSOP-24 E $6.51 $5.50 Yes
LTC3722EGN-1#TRPBF SSOP-24 E $5.60 Yes
LTC3722EGN-2#PBF SSOP-24 E $6.51 $5.50 Yes
LTC3722EGN-2#TRPBF SSOP-24 E $5.60 Yes
LTC3722HGN-1#PBF SSOP-24 H $8.91 $6.24 Yes
LTC3722HGN-1#TRPBF SSOP-24 H $6.30 Yes
LTC3722IGN-1#PBF SSOP-24 I $8.49 $5.94 Yes
LTC3722IGN-1#TRPBF SSOP-24 I $6.00 Yes
LTC3722IGN-2#PBF SSOP-24 I $8.49 $5.94 Yes
LTC3722IGN-2#TRPBF SSOP-24 I $6.00 Yes
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* The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Linear Technology sales office or authorized distributor.

Demo Boards

Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.

Part Number Description Price Documentation
DC607A LTC3722-1 Demo Board | Isolated Full-Bridge, 36-72V Input, VOUT = 12V @ 35A $250.00
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Click here to view our complete list of demo boards


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