LMR34215-Q1 Series

4.2-V to 42-V, 1.5-A ultra-small synchronous step-down converter

Catalog

4.2-V to 42-V, 1.5-A ultra-small synchronous step-down converter

Part	Regulator Topology	Main Purpose	Outputs and Type	Outputs and Type	Current - Output	Frequency - Switching	Voltage - Input [Min]	Voltage - Input [Max]	Utilized IC / Part	Voltage - Output	Supplied Contents	Board Type	Grade	Output Type	Output Configuration	Supplier Device Package	Function	Qualification	Operating Temperature [Min]	Operating Temperature [Max]	Voltage - Input (Min) [Min]	Package / Case	Number of Outputs	Voltage - Output (Min/Fixed)	Voltage - Input (Max) [Max]	Topology	Mounting Type	Output Type	Voltage - Output (Max) [Max]
Texas Instruments LMR34215FSC5EVM	Buck	DC/DC Step Down	Non-Isolated	1	1.5 A	2.1 MHz	4.2 V	42 V	LMR34215-Q1	5 V	Board(s)	Fully Populated
Texas Instruments LMR34215FSC5RNXRQ1					1.5 A	2.1 MHz							Automotive	1.81 mOhm	Positive	12-VQFN-HR (3x2)	Step-Down	AEC-Q100	-40 °C	125 ¯C	4.2 V	12-PowerVFQFN	1	5 V	42 V	Buck	Surface Mount Wettable Flank
Texas Instruments LMR34215FSC5RNXTQ1					1.5 A	2.1 MHz							Automotive	1.81 mOhm	Positive	12-VQFN-HR (3x2)	Step-Down	AEC-Q100	-40 °C	125 ¯C	4.2 V	12-PowerVFQFN	1	5 V	42 V	Buck	Surface Mount Wettable Flank
Texas Instruments LMR34215FAQRNXTQ1					1.5 A	400 kHz							Automotive		Positive	12-VQFN-HR (3x2)	Step-Down	AEC-Q100	-40 °C	125 °C	4.2 V	12-PowerVFQFN	1	1 V	42 V	Buck	Surface Mount Wettable Flank	Adjustable	42 V
Texas Instruments LMR34215SC5QRNXRQ1					1.5 A	2.1 MHz							Automotive	1.81 mOhm	Positive	12-VQFN-HR (3x2)	Step-Down	AEC-Q100	-40 °C	125 ¯C	4.2 V	12-PowerVFQFN	1	5 V	42 V	Buck	Surface Mount Wettable Flank

Catalog

4.2-V to 42-V, 1.5-A ultra-small synchronous step-down converter

Key Features

• AEC-Q100-qualified for automotive applications:Temperature grade 1: –40°C to +125°C, TAFunctional Safety-CapableDocumentation available to aid functional safety system designDesigned for automotive applicationsJunction temperature range –40°C to +150°C0.4-V dropout with 1.5-A load (typical)±1.5% reference voltage tolerance5-V fixed-output, adjustable output voltage optionsSuited for scalable power suppliesPin compatible with:LMR36015-Q1,LMR36006-Q1(60 V, 0.6 A, or 1.5 A)LMR33630-Q1,LMR33620-Q1(36 V, 2 A, or 3 A)400-kHz, 2.1-MHz frequency optionsIntegration reduces solution size and costSmall, 2-mm × 3-mm VQFN package with wettable flanksFew external componentsLow power dissipation across load spectrum93% efficiency at 400 kHz (12 VIN, 5 VOUT, 1 A)Increased light load efficiency in PFMLow operating quiescent current of 24 µAOptmized for ultra low EMI requirementsMeets CISPR25 class 5 standardHotrod™ package minimizes switch node ringingParallel input path minimizes parasitic inductanceSpread spectrum reduces peak emissionsAEC-Q100-qualified for automotive applications:Temperature grade 1: –40°C to +125°C, TAFunctional Safety-CapableDocumentation available to aid functional safety system designDesigned for automotive applicationsJunction temperature range –40°C to +150°C0.4-V dropout with 1.5-A load (typical)±1.5% reference voltage tolerance5-V fixed-output, adjustable output voltage optionsSuited for scalable power suppliesPin compatible with:LMR36015-Q1,LMR36006-Q1(60 V, 0.6 A, or 1.5 A)LMR33630-Q1,LMR33620-Q1(36 V, 2 A, or 3 A)400-kHz, 2.1-MHz frequency optionsIntegration reduces solution size and costSmall, 2-mm × 3-mm VQFN package with wettable flanksFew external componentsLow power dissipation across load spectrum93% efficiency at 400 kHz (12 VIN, 5 VOUT, 1 A)Increased light load efficiency in PFMLow operating quiescent current of 24 µAOptmized for ultra low EMI requirementsMeets CISPR25 class 5 standardHotrod™ package minimizes switch node ringingParallel input path minimizes parasitic inductanceSpread spectrum reduces peak emissions

Description

The LMR34215-Q1 regulator is an easy-to-use, synchronous, step-down DC/DC converter. With integrated high-side and low-side power MOSFETs, output current is delivered over a wide input voltage range of 4.2 V to 42 V. The LMR34215-Q1 uses peak-current-mode control to provide optimal efficiency and output voltage accuracy. Precision enable gives flexibility by enabling a direct connection to the wide input voltage or precise control over device start-up and shutdown. The power-good flag, with built-in filtering and delay, offers a true indication of system status eliminating the requirement for an external supervisor. The LMR34215-Q1 regulator is an easy-to-use, synchronous, step-down DC/DC converter. With integrated high-side and low-side power MOSFETs, output current is delivered over a wide input voltage range of 4.2 V to 42 V. The LMR34215-Q1 uses peak-current-mode control to provide optimal efficiency and output voltage accuracy. Precision enable gives flexibility by enabling a direct connection to the wide input voltage or precise control over device start-up and shutdown. The power-good flag, with built-in filtering and delay, offers a true indication of system status eliminating the requirement for an external supervisor.