LM25119Q Series

Automotive grade 4.5-42V wide VIN, current mode dual synchronous buck controller

Catalog

Automotive grade 4.5-42V wide VIN, current mode dual synchronous buck controller

Part	Operating Temperature [Min]	Operating Temperature [Max]	Supplier Device Package	Frequency - Switching [Max]	Frequency - Switching [Min]	Voltage - Supply (Vcc/Vdd) [Max]	Voltage - Supply (Vcc/Vdd) [Min]	Output Phases	Number of Outputs	Topology	Output Type	Output Configuration	Function	Mounting Type	Control Features	Utilized IC / Part	Voltage - Output	Current - Output	Board Type	Main Purpose	Regulator Topology	Voltage - Input [Max]	Voltage - Input [Min]	Supplied Contents	Outputs and Type	Outputs and Type	Qualification	Grade
Texas Instruments LM25119PSQX/NOPB	-40 °C	125 ¯C	32-WQFN (5x5)	750 kHz	50 kHz	42 V	4.5 V	2	2	Buck	Transistor Driver	Positive	Step-Down	Surface Mount	Enable Frequency Control Ramp Reset Soft Start
Texas Instruments LM25119EVAL/NOPB																LM25119	1.8 V 3.3 V	16 A	Fully Populated	DC/DC Step Down	Buck	36 V	6 V	Board(s)	2	Non-Isolated
Texas Instruments LM25119PSQ/NOPB	-40 °C	125 ¯C	32-WQFN (5x5)	750 kHz	50 kHz	42 V	4.5 V	2	2	Buck	Transistor Driver	Positive	Step-Down	Surface Mount	Enable Frequency Control Ramp Reset Soft Start
Texas Instruments LM25119QPSQX/NOPB	-40 °C	125 ¯C	32-WQFN (5x5)	750 kHz	50 kHz	42 V	4.5 V	2	2	Buck	Transistor Driver	Positive	Step-Down	Surface Mount	Enable Frequency Control Ramp Reset Soft Start												AEC-Q100	Automotive
Texas Instruments LM25119QPSQ/NOPB	-40 °C	125 ¯C	32-WQFN (5x5)	750 kHz	50 kHz	42 V	4.5 V	2	2	Buck	Transistor Driver	Positive	Step-Down	Surface Mount	Enable Frequency Control Ramp Reset Soft Start												AEC-Q100	Automotive

Catalog

Automotive grade 4.5-42V wide VIN, current mode dual synchronous buck controller

Key Features

• Qualified for Automotive ApplicationsAEC-Q100 Qualified With the Following Results:Device Temperature Grade 1: –40°C to 125°C Ambient Operating Temperature RangeDevice HBM ESD Classification Level 1CDevice CDM ESD Classification Level C4AEmulated Peak Current Mode ControlWide Operating Range (4.5 V to 42 V)Easily Configurable for Dual Outputs or Interleaved Single OutputRobust 3.3-A Peak Gate DriveSwitching Frequency Programmable to 750 kHzOptional Diode Emulation ModeProgrammable Output From 0.8 VPrecision 1.5% Voltage ReferenceProgrammable Current LimitHiccup Mode Overload ProtectionProgrammable Soft-StartProgrammable Line Undervoltage LockoutAutomatic Switchover to External Bias SupplyChannel2 Enable Logic InputThermal ShutdownLeadless 32-Pin WQFN PackageQualified for Automotive ApplicationsAEC-Q100 Qualified With the Following Results:Device Temperature Grade 1: –40°C to 125°C Ambient Operating Temperature RangeDevice HBM ESD Classification Level 1CDevice CDM ESD Classification Level C4AEmulated Peak Current Mode ControlWide Operating Range (4.5 V to 42 V)Easily Configurable for Dual Outputs or Interleaved Single OutputRobust 3.3-A Peak Gate DriveSwitching Frequency Programmable to 750 kHzOptional Diode Emulation ModeProgrammable Output From 0.8 VPrecision 1.5% Voltage ReferenceProgrammable Current LimitHiccup Mode Overload ProtectionProgrammable Soft-StartProgrammable Line Undervoltage LockoutAutomatic Switchover to External Bias SupplyChannel2 Enable Logic InputThermal ShutdownLeadless 32-Pin WQFN Package

Description

The LM25119Q device is a dual 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 using an emulated current ramp. Current mode control provides inherent line feedforward, 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 switching frequency is programmable from 50 kHz to 750 kHz. The LM25119Q device drives external high-side and low-side N-channel MOS 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 high voltage bias regulator with automatic switch-over to external bias further improves efficiency. Additional features include thermal shutdown, frequency synchronization, cycle-by-cycle and hiccup mode current limit and adjustable line undervoltage lockout. The device is available in a power enhanced leadless 32-pin WQFN package featuring an exposed die attach pad to aid thermal dissipation. The LM25119Q device is a dual 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 using an emulated current ramp. Current mode control provides inherent line feedforward, 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 switching frequency is programmable from 50 kHz to 750 kHz. The LM25119Q device drives external high-side and low-side N-channel MOS 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 high voltage bias regulator with automatic switch-over to external bias further improves efficiency. Additional features include thermal shutdown, frequency synchronization, cycle-by-cycle and hiccup mode current limit and adjustable line undervoltage lockout. The device is available in a power enhanced leadless 32-pin WQFN package featuring an exposed die attach pad to aid thermal dissipation.