Integrated Circuits (ICs)

LM5140QRWGTQ1

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WIDE VIN DUAL 2.2MHZ LOW IQ SYNCHRONOUS BUCK CONTROLLER

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Search across all available documentation for this part.

DocumentsAutomotive Infotainment EE Buck Converter/Controller Selection Guide (Rev. B)LM5140-Q1 Wide Input Range Dual Synchronous Buck Controller datasheet (Rev. A)+14

Integrated Circuits (ICs)

LM5140QRWGTQ1

Active

Texas Instruments

WIDE VIN DUAL 2.2MHZ LOW IQ SYNCHRONOUS BUCK CONTROLLER

Deep-Dive with AI

DocumentsAutomotive Infotainment EE Buck Converter/Controller Selection Guide (Rev. B)LM5140-Q1 Wide Input Range Dual Synchronous Buck Controller datasheet (Rev. A)+14

Specifications Series Pricing Description Documents

Technical Specifications

Parameters and characteristics for this part

Specification	LM5140QRWGTQ1

Clock Sync	True
Control Features	Enable, Soft Start, Frequency Control, Current Limit
Frequency - Switching	440 kHz, 2.2 MHz
Function	Step-Down
Grade	Automotive
Mounting Type	Wettable Flank, Surface Mount
Number of Outputs	2
Operating Temperature [Max]	150 °C
Operating Temperature [Min]	-40 °C
Output Configuration	Positive
Output Phases	1
Output Type	Transistor Driver
Package / Case	40-VFQFN Exposed Pad
Qualification	AEC-Q100
Supplier Device Package	40-VQFNP (6x6)
Synchronous Rectifier	True
Topology	Buck
Voltage - Supply (Vcc/Vdd) [Max]	65 V
Voltage - Supply (Vcc/Vdd) [Min]	3.8 V

LM5140-Q1 Series

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

Pricing

Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly

Distributor	Package	Quantity	$

Digikey	Cut Tape (CT)	1	$ 14.88
		10	$ 13.68
		25	$ 13.11
		100	$ 11.55
	Digi-Reel®	1	$ 14.88
		10	$ 13.68
		25	$ 13.11
		100	$ 11.55
	Tape & Reel (TR)	250	$ 10.99
		500	$ 10.28
Texas Instruments	SMALL T&R	1	$ 12.91
		100	$ 10.53
		250	$ 8.27
		1000	$ 7.02

Description

General part information

LM5140-Q1 Series

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.