LM5085-Q1 Series

Automotive Grade 4.5-75V Wide Vin, Constant On-Time Non-Synchronous PFET Buck Controller

Catalog

Automotive Grade 4.5-75V Wide Vin, Constant On-Time Non-Synchronous PFET Buck Controller

Part	Frequency - Switching [Max]	Output Phases	Function	Voltage - Supply (Vcc/Vdd) [Max]	Voltage - Supply (Vcc/Vdd) [Min]	Operating Temperature [Min]	Operating Temperature [Max]	Output Type	Control Features	Topology	Mounting Type	Number of Outputs	Package / Case	Package / Case [custom]	Package / Case	Output Configuration	Duty Cycle (Max) [Max]	Voltage - Output	Main Purpose	Current - Output	Voltage - Input [Min]	Voltage - Input [Max]	Board Type	Regulator Topology	Frequency - Switching	Utilized IC / Part	Supplied Contents	Outputs and Type	Outputs and Type	Package / Case [custom]	Supplier Device Package	Qualification	Grade
Texas Instruments LM5085MME/NOPB	1 MHz	1	Step-Down	75 V	4.5 V	-40 °C	125 ¯C	Transistor Driver	Current Limit Enable On Time Control	Buck	Surface Mount	1	8-MSOP 8-TSSOP	0.118 in	3 mm	Positive	100 %
Texas Instruments LM5085MM/NOPB	1 MHz	1	Step-Down	75 V	4.5 V	-40 °C	125 ¯C	Transistor Driver	Current Limit Enable On Time Control	Buck	Surface Mount	1	8-MSOP 8-TSSOP	0.118 in	3 mm	Positive	100 %
Texas Instruments LM5085EVAL/NOPB																		5 V	DC/DC Step Down	4.5 A	5.5 V	55 V	Fully Populated	Buck	300 kHz	LM5085	Board(s)	Non-Isolated	1
Texas Instruments LM5085MYE/NOPB	1 MHz	1	Step-Down	75 V	4.5 V	-40 °C	125 ¯C	Transistor Driver	Current Limit Enable On Time Control	Buck	Surface Mount	1	8-MSOP 8-PowerTSSOP	0.118 in		Positive	100 %													3 mm	8-HVSSOP
Texas Instruments LM5085SD/NOPB	1 MHz	1	Step-Down	75 V	4.5 V	-40 °C	125 ¯C	Transistor Driver	Current Limit Enable On Time Control	Buck	Surface Mount	1	8-WFDFN Exposed Pad			Positive	100 %														8-WSON (3x3)
Texas Instruments LM5085QMYE/NOPB	1 MHz	1	Step-Down	75 V	4.5 V	-40 °C	125 ¯C	Transistor Driver	Current Limit Enable On Time Control	Buck	Surface Mount	1	8-MSOP 8-PowerTSSOP	0.118 in		Positive	100 %													3 mm	8-HVSSOP	AEC-Q100	Automotive
Texas Instruments LM5085SDX/NOPB	1 MHz	1	Step-Down	75 V	4.5 V	-40 °C	125 ¯C	Transistor Driver	Current Limit Enable On Time Control	Buck	Surface Mount	1	8-WFDFN Exposed Pad			Positive	100 %														8-WSON (3x3)
Texas Instruments LM5085MMX/NOPB	1 MHz	1	Step-Down	75 V	4.5 V	-40 °C	125 ¯C	Transistor Driver	Current Limit Enable On Time Control	Buck	Surface Mount	1	8-MSOP 8-TSSOP	0.118 in	3 mm	Positive	100 %
Texas Instruments LM5085SDE/NOPB	1 MHz	1	Step-Down	75 V	4.5 V	-40 °C	125 ¯C	Transistor Driver	Current Limit Enable On Time Control	Buck	Surface Mount	1	8-WFDFN Exposed Pad			Positive	100 %														8-WSON (3x3)
Texas Instruments LM5085MYX/NOPB	1 MHz	1	Step-Down	75 V	4.5 V	-40 °C	125 ¯C	Transistor Driver	Current Limit Enable On Time Control	Buck	Surface Mount	1	8-MSOP 8-PowerTSSOP	0.118 in		Positive	100 %													3 mm	8-HVSSOP

Catalog

Automotive Grade 4.5-75V Wide Vin, Constant On-Time Non-Synchronous PFET Buck Controller

Key Features

• LM5085-Q1 is an Automotive Grade Product thatis AEC-Q100 Grade 1 Qualified (–40°C to 125°COperating Junction Temperature)Wide 4.5-V to 75-V Input Voltage RangeAdjustable Current Limit Using RDS(ON)or aCurrent Sense ResistorProgrammable Switching Frequency to 1MHzNo Loop Compensation RequiredUltra-Fast Transient ResponseNearly Constant Operating Frequency with Lineand Load VariationsAdjustable Output Voltage from 1.25 VPrecision ±2% Feedback ReferenceCapable of 100% Duty Cycle OperationInternal Soft-start TimerIntegrated High Voltage Bias RegulatorThermal ShutdownPackage:HVSSOP-8VSSOP-8WSON-8LM5085-Q1 is an Automotive Grade Product thatis AEC-Q100 Grade 1 Qualified (–40°C to 125°COperating Junction Temperature)Wide 4.5-V to 75-V Input Voltage RangeAdjustable Current Limit Using RDS(ON)or aCurrent Sense ResistorProgrammable Switching Frequency to 1MHzNo Loop Compensation RequiredUltra-Fast Transient ResponseNearly Constant Operating Frequency with Lineand Load VariationsAdjustable Output Voltage from 1.25 VPrecision ±2% Feedback ReferenceCapable of 100% Duty Cycle OperationInternal Soft-start TimerIntegrated High Voltage Bias RegulatorThermal ShutdownPackage:HVSSOP-8VSSOP-8WSON-8

Description

The LM5085 is a high efficiency PFET switching regulator controller that can be used to quickly and easily develop a small, efficient buck regulator for a wide range of applications. This high voltage controller contains a PFET gate driver and a high voltage bias regulator which operates over a wide 4.5-V to 75-V input range. The constant on-time regulation principle requires no loop compensation, simplifies circuit implementation, and results in ultrafast load transient response. The operating frequency remains nearly constant with line and load variations due to the inverse relationship between the input voltage and the on-time. The PFET architecture allows 100% duty cycle operation for a low dropout voltage. Either the RDS(ON)of the PFET or an external sense resistor can be used to sense current for over-current detection. The LM5085 is a high efficiency PFET switching regulator controller that can be used to quickly and easily develop a small, efficient buck regulator for a wide range of applications. This high voltage controller contains a PFET gate driver and a high voltage bias regulator which operates over a wide 4.5-V to 75-V input range. The constant on-time regulation principle requires no loop compensation, simplifies circuit implementation, and results in ultrafast load transient response. The operating frequency remains nearly constant with line and load variations due to the inverse relationship between the input voltage and the on-time. The PFET architecture allows 100% duty cycle operation for a low dropout voltage. Either the RDS(ON)of the PFET or an external sense resistor can be used to sense current for over-current detection.