LM5140-Q1 Series

Wide Vin Dual 2.2MHz low Iq Synchronous Buck Controller

Catalog

Wide Vin Dual 2.2MHz low Iq Synchronous Buck Controller

Part	Regulator Topology	Frequency - Switching	Supplied Contents	Board Type	Voltage - Input [Max]	Voltage - Input [Min]	Outputs and Type	Outputs and Type	Main Purpose	Current - Output	Utilized IC / Part	Voltage - Output	Topology	Number of Outputs	Function	Output Configuration	Package / Case	Control Features	Grade	Operating Temperature [Max]	Operating Temperature [Min]	Voltage - Supply (Vcc/Vdd) [Max]	Voltage - Supply (Vcc/Vdd) [Min]	Output Type	Supplier Device Package	Output Phases	Qualification	Mounting Type
Texas Instruments LM5140RWGEVM	Buck	2.2 MHz	Board(s)	Fully Populated	42 V	3.8 V	2	Non-Isolated	DC/DC Step Down	5 A 6 A	LM5140-Q1	3.3 V 5 V
Texas Instruments LM5140QRWGTQ1		2.2 MHz 440 kHz											Buck	2	Step-Down	Positive	40-VFQFN Exposed Pad	Current Limit Enable Frequency Control Soft Start	Automotive	150 °C	-40 °C	65 V	3.8 V	Transistor Driver	40-VQFNP (6x6)	1	AEC-Q100	Surface Mount Wettable Flank
Texas Instruments LM5140QRWGRQ1		2.2 MHz 440 kHz											Buck	2	Step-Down	Positive	40-VFQFN Exposed Pad	Current Limit Enable Frequency Control Soft Start	Automotive	150 °C	-40 °C	65 V	3.8 V	Transistor Driver	40-VQFNP (6x6)	1	AEC-Q100	Surface Mount Wettable Flank

Catalog

Wide Vin Dual 2.2MHz low Iq Synchronous Buck Controller

Key Features

• Qualified for Automotive ApplicationsAEC-Q100 Test Guidance With the FollowingDevice Temperature Grade 1: –40°;C to +125°;C Ambient Operating TemperatureDevice HBM ESD Classification Level 2Device CDM ESD Classification Level C4BInput Operating Range from 3.8 V to 65 V (70 V Absolute Maximum)Two Interleaved Buck Controllers With:VOUT1 Fixed 3.3 V, 5 V, or Adjustable from 1.5 V – 15 V, Accuracy ±1%VOUT2 Fixed 5 V, 8 V, or Adjustable from 1.5 V – 15 V, Accuracy ±1%Fixed 2.2-MHz or 440-kHz Switching Frequency, Accuracy ±7%Optional Synchronization to an External ClockSYNC Output Clock for Additional ConvertersShutdown Mode Current: 9 µA TypicalNo Load Standby Current: 35 µA Typical (One Channel Operating)Current Limit Threshold Programmable to 50 mV or 75 mV, Accuracy ±10%Independent Enable Inputs for VOUT1 and VOUT2Hiccup Mode Protection for Sustained OverloadIndependent Power Good OutputsHigh-Side and Low-Side Gate Drivers With Adjustable Slew Rate ControlSelectable Diode Emulation or Continuous Conduction at Light Load40-Pin VQFN Package With Wettable FlanksQualified for Automotive ApplicationsAEC-Q100 Test Guidance With the FollowingDevice Temperature Grade 1: –40°;C to +125°;C Ambient Operating TemperatureDevice HBM ESD Classification Level 2Device CDM ESD Classification Level C4BInput Operating Range from 3.8 V to 65 V (70 V Absolute Maximum)Two Interleaved Buck Controllers With:VOUT1 Fixed 3.3 V, 5 V, or Adjustable from 1.5 V – 15 V, Accuracy ±1%VOUT2 Fixed 5 V, 8 V, or Adjustable from 1.5 V – 15 V, Accuracy ±1%Fixed 2.2-MHz or 440-kHz Switching Frequency, Accuracy ±7%Optional Synchronization to an External ClockSYNC Output Clock for Additional ConvertersShutdown Mode Current: 9 µA TypicalNo Load Standby Current: 35 µA Typical (One Channel Operating)Current Limit Threshold Programmable to 50 mV or 75 mV, Accuracy ±10%Independent Enable Inputs for VOUT1 and VOUT2Hiccup Mode Protection for Sustained OverloadIndependent Power Good OutputsHigh-Side and Low-Side Gate Drivers With Adjustable Slew Rate ControlSelectable Diode Emulation or Continuous Conduction at Light Load40-Pin VQFN Package With Wettable Flanks

Description

The LM5140-Q1 is a dual synchronous buck controller intended for high voltage wide VINstep-down converter applications. The control method is based on current mode control. Current mode control provides inherent line feedforward, cycle-by-cycle current limiting, and easier loop compensation. The LM5140-Q1 features adjustable slew rate control to simplify compliance with the CISPR and automotive EMI requirements. The LM5140-Q1 operates at selectable switching frequencies of 2.2 MHz or 440 kHz with the two controller channels switching 180°; out of phase. In light or no-load conditions, the LM5140-Q1 operates in skip cycle mode for improved low power efficiency. The LM5140-Q1 includes a high voltage bias regulator with automatic switchover to an external bias supply to improve efficiency and reduce input current. Additional features include frequency synchronization, cycle-by-cycle current limit, hiccup mode fault protection for sustained overloads, independent power good outputs, and independent enable inputs. The LM5140-Q1 is a dual synchronous buck controller intended for high voltage wide VINstep-down converter applications. The control method is based on current mode control. Current mode control provides inherent line feedforward, cycle-by-cycle current limiting, and easier loop compensation. The LM5140-Q1 features adjustable slew rate control to simplify compliance with the CISPR and automotive EMI requirements. The LM5140-Q1 operates at selectable switching frequencies of 2.2 MHz or 440 kHz with the two controller channels switching 180°; out of phase. In light or no-load conditions, the LM5140-Q1 operates in skip cycle mode for improved low power efficiency. The LM5140-Q1 includes a high voltage bias regulator with automatic switchover to an external bias supply to improve efficiency and reduce input current. Additional features include frequency synchronization, cycle-by-cycle current limit, hiccup mode fault protection for sustained overloads, independent power good outputs, and independent enable inputs.