LM25122-Q1 Series
3-42-V wide VIN, synchronous boost controller with multiphase capability, AEC-Q100 qualified
Manufacturer: Texas Instruments
Catalog
3-42-V wide VIN, synchronous boost controller with multiphase capability, AEC-Q100 qualified
Key Features
• AEC-Q100 Qualified with the following results:Device Temperature Grade 1: -40°C to +125°C Ambient Operating Temperature RangeDevice HBM ESD Classification Level 2Device CDM ESD Classification Level C6Maximum Input Voltage : 42 VMin Input Voltage : 3 V (4.5 V for startup)Output Voltage up to 50 VBypass (VOUT= VIN) Operation1.2 V Reference with ±1.0% AccuracyFree-Run and Synchronizable Switching to 600 kHzPeak Current Mode ControlRobust 3 A Integrated Gate DriversAdaptive Dead-Time ControlOptional Diode Emulation ModeProgrammable Cycle-by-Cycle Current LimitHiccup Mode Overload ProtectionProgrammable Line UVLOProgrammable Soft-StartThermal Shutdown ProtectionLow Shutdown Quiescent Current: 9 µAProgrammable Slope CompensationProgrammable Skip Cycle Mode Reduces Standby PowerAllows External VCC SupplyInductor DCR Current Sensing CapabilityMultiphase CapabilityThermally Enhanced 20-Pin HTSSOPAEC-Q100 Qualified with the following results:Device Temperature Grade 1: -40°C to +125°C Ambient Operating Temperature RangeDevice HBM ESD Classification Level 2Device CDM ESD Classification Level C6Maximum Input Voltage : 42 VMin Input Voltage : 3 V (4.5 V for startup)Output Voltage up to 50 VBypass (VOUT= VIN) Operation1.2 V Reference with ±1.0% AccuracyFree-Run and Synchronizable Switching to 600 kHzPeak Current Mode ControlRobust 3 A Integrated Gate DriversAdaptive Dead-Time ControlOptional Diode Emulation ModeProgrammable Cycle-by-Cycle Current LimitHiccup Mode Overload ProtectionProgrammable Line UVLOProgrammable Soft-StartThermal Shutdown ProtectionLow Shutdown Quiescent Current: 9 µAProgrammable Slope CompensationProgrammable Skip Cycle Mode Reduces Standby PowerAllows External VCC SupplyInductor DCR Current Sensing CapabilityMultiphase CapabilityThermally Enhanced 20-Pin HTSSOP
Description
AI
The LM25122 is a multiphase capable synchronous boost controller intended for high-efficiency synchronous boost regulator applications. The control method is based upon peak current mode control. Current mode control provides inherent line feed-forward, cycle-by-cycle current limiting and ease of loop compensation.
The switching frequency is programmable up to 600 kHz. Higher efficiency is achieved by two robust N-channel MOSFET gate drivers with adaptive dead-time control. A user-selectable diode emulation mode also enables discontinuous mode operation for improved efficiency at light load conditions.
An internal charge pump allows 100% duty cycle for high-side synchronous switch (Bypass operation). A 180º phase shifted clock output enables easy multi-phase interleaved configuration. Additional features include thermal shutdown, frequency synchronization, hiccup mode current limit and adjustable line undervoltage lockout.
The LM25122 is a multiphase capable synchronous boost controller intended for high-efficiency synchronous boost regulator applications. The control method is based upon peak current mode control. Current mode control provides inherent line feed-forward, cycle-by-cycle current limiting and ease of loop compensation.
The switching frequency is programmable up to 600 kHz. Higher efficiency is achieved by two robust N-channel MOSFET gate drivers with adaptive dead-time control. A user-selectable diode emulation mode also enables discontinuous mode operation for improved efficiency at light load conditions.
An internal charge pump allows 100% duty cycle for high-side synchronous switch (Bypass operation). A 180º phase shifted clock output enables easy multi-phase interleaved configuration. Additional features include thermal shutdown, frequency synchronization, hiccup mode current limit and adjustable line undervoltage lockout.
