Catalog
100V Wide Vin Synchronous Buck Controller
Key Features
• Hermetic Package for Harsh Operating EnvironmentsEmulated Peak Current ModeWide Operating Range up to 100VLow IQShutdown (< 10 µA)Drives Standard or Logic Level MOSFETsRobust 3.5A Peak Gate DriveFree-Run or Synchronous Operation to 1 MHzOptional Diode Emulation ModeProgrammable Output from 1.215V to 80VPrecision 1.5% Voltage ReferenceProgrammable Current LimitProgrammable Soft-StartProgrammable Line Under-Voltage LockoutAutomatic Switch to External Bias SupplyCPGA-20 with No Thermal ShutdownAll trademarks are the property of their respective owners.Hermetic Package for Harsh Operating EnvironmentsEmulated Peak Current ModeWide Operating Range up to 100VLow IQShutdown (< 10 µA)Drives Standard or Logic Level MOSFETsRobust 3.5A Peak Gate DriveFree-Run or Synchronous Operation to 1 MHzOptional Diode Emulation ModeProgrammable Output from 1.215V to 80VPrecision 1.5% Voltage ReferenceProgrammable Current LimitProgrammable Soft-StartProgrammable Line Under-Voltage LockoutAutomatic Switch to External Bias SupplyCPGA-20 with No Thermal ShutdownAll trademarks are the property of their respective owners.
Description
AI
The LM5116WG is a synchronous buck controller intended for step-down regulator applications from a high voltage or widely varying input supply. The control method is based upon current mode control utilizing an emulated current ramp. Current mode control provides inherent line feed-forward, cycle by cycle current limiting and ease of loop compensation. The use of an emulated control ramp reduces noise sensitivity of the pulse-width modulation circuit, allowing reliable control of very small duty cycles necessary in high input voltage applications. The operating frequency is programmable from 50 kHz to 1 MHz. The LM5116WG drives external high-side and low-side NMOS power switches with adaptive dead-time control. A user-selectable diode emulation mode enables discontinuous mode operation for improved efficiency at light load conditions. A low quiescent current shutdown disables the controller and consumes less than 10 µA of total input current. Additional features include a high voltage bias regulator, automatic switch-over to external bias for improved efficiency, frequency synchronization, cycle by cycle current limit and adjustable line under-voltage lockout. The device is available in a CPGA-20 high temperature ceramic package with the thermal shutdown feature disabled.
The LM5116WG is a synchronous buck controller intended for step-down regulator applications from a high voltage or widely varying input supply. The control method is based upon current mode control utilizing an emulated current ramp. Current mode control provides inherent line feed-forward, cycle by cycle current limiting and ease of loop compensation. The use of an emulated control ramp reduces noise sensitivity of the pulse-width modulation circuit, allowing reliable control of very small duty cycles necessary in high input voltage applications. The operating frequency is programmable from 50 kHz to 1 MHz. The LM5116WG drives external high-side and low-side NMOS power switches with adaptive dead-time control. A user-selectable diode emulation mode enables discontinuous mode operation for improved efficiency at light load conditions. A low quiescent current shutdown disables the controller and consumes less than 10 µA of total input current. Additional features include a high voltage bias regulator, automatic switch-over to external bias for improved efficiency, frequency synchronization, cycle by cycle current limit and adjustable line under-voltage lockout. The device is available in a CPGA-20 high temperature ceramic package with the thermal shutdown feature disabled.
