Development Boards, Kits, Programmers

LMR36503RFEVM

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Texas Instruments

3-V TO 65-V, 0.3-A ULTRA-SMALL S

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Development Boards, Kits, Programmers

LMR36503RFEVM

Active

Texas Instruments

3-V TO 65-V, 0.3-A ULTRA-SMALL S

Deep-Dive with AI

DocumentsDatasheet

Specifications Series Pricing Description Documents

Technical Specifications

Parameters and characteristics for this part

Specification	LMR36503RFEVM

Board Type	Fully Populated
Current - Output	300 mA
Frequency - Switching	1 MHz
Main Purpose	DC/DC, Step Down
Outputs and Type	Non-Isolated
Outputs and Type	1
Regulator Topology	Buck
Supplied Contents	Board(s)
Utilized IC / Part	LMR36503
Voltage - Input [Max]	65 V
Voltage - Input [Min]	5.5 V
Voltage - Output	3.3 V

LMR36503-Q1 Series

Automotive 3-V to 65-V, 0.3-A buck converter optimized for size and light load efficiency

Part	Output Type	Voltage - Input (Min) [Min]	Voltage - Output (Min/Fixed)	Number of Outputs	Mounting Type	Supplier Device Package	Current - Output	Frequency - Switching [Max]	Frequency - Switching [Min]	Package / Case	Output Configuration	Operating Temperature [Max]	Operating Temperature [Min]	Voltage - Input (Max) [Max]	Function	Topology	Voltage - Output (Max) [Max]	Frequency - Switching	Outputs and Type	Outputs and Type	Regulator Topology	Utilized IC / Part	Voltage - Output	Voltage - Input [Min]	Voltage - Input [Max]	Board Type	Supplied Contents	Main Purpose	Output Type	Grade	Qualification
Texas Instruments LMR36503RFRPER	Adjustable	3 V	1 V	1	Surface Mount Wettable Flank	9-VQFN-HR (2x2)	300 mA	2.2 MHz	200 kHz	9-PowerVFQFN	Positive	150 °C	-40 °C	65 V	Step-Down	Buck	65 V
Texas Instruments LMR36503RFEVM							300 mA											1 MHz	Non-Isolated	1	Buck	LMR36503	3.3 V	5.5 V	65 V	Fully Populated	Board(s)	DC/DC Step Down
Texas Instruments LMR36503R5URPER		3.6 V	5 V	1	Surface Mount Wettable Flank	9-VQFN-HR (2x2)	300 mA	2.2 MHz	200 kHz	9-PowerVFQFN	Positive	150 °C	-40 °C	65 V	Step-Down	Buck													1.81 mOhm
Texas Instruments LMR36503R5RPER		3 V	5 V	1	Surface Mount Wettable Flank	9-VQFN-HR (2x2)	300 mA	2.2 MHz	200 kHz	9-PowerVFQFN	Positive	150 °C	-40 °C	65 V	Step-Down	Buck													1.81 mOhm
Texas Instruments LMR36503MSC5RPERQ1		3 V	5 V	1	Surface Mount Wettable Flank	9-VQFN-HR (2x2)	300 mA			9-PowerVFQFN	Positive	125 °C	-40 °C	65 V	Step-Down	Buck		2.2 MHz											1.81 mOhm	Automotive	AEC-Q100
Texas Instruments LMR36503MSC3RPERQ1		3 V	3.3 V	1	Surface Mount Wettable Flank	9-VQFN-HR (2x2)	300 mA			9-PowerVFQFN	Positive	125 °C	-40 °C	65 V	Step-Down	Buck		2.2 MHz											1.81 mOhm	Automotive	AEC-Q100
Texas Instruments LMR36503MSCQRPERQ1	Adjustable	3 V	1 V	1	Surface Mount Wettable Flank	9-VQFN-HR (2x2)	300 mA			9-PowerVFQFN	Positive	125 °C	-40 °C	65 V	Step-Down	Buck	65 V	2.2 MHz												Automotive	AEC-Q100

Pricing

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

Distributor	Package	Quantity	$

Digikey	Box	1	$ 58.80

Description

General part information

LMR36503-Q1 Series

The LMR36503-Q1 is the industry’s smallest 65 V, 0.3 A synchronous step-down DC/DC converter in 2-mm x 2-mm HotRod™ package. This easy-to-use converter can handle input voltage transients up to 70 V, provide excellent EMI performance and support fixed 3.3 V, 5 V and other adjustable output voltages.

The LMR36503-Q1 uses peak current mode control architecture with internal compensation and maintains stable operation with minimal output capacitance. The wide input operating range of the LMR36503-Q1 helps it remain functional during a deep input voltage sag condition, making it an excellent choice for automotive applications withstanding severe cold crank start impulses. The PGOOD flag in the LMR36503-Q1 provides precise indication of the output voltage status, eliminating the requirement for an external supervisor. A seamless transition from FPWM to PFM, with an ultra-low standby quiescent current allows the LMR36503-Q1 to support much higher system efficiency at low output loads. The MODE/SYNC pin variant helps to synchronize the LMR36503-Q1 to an external clock. With the right resistor selection, the LMR36503-Q1 RT pin variant can also be externally programmed to any desired switching frequency of operation. The rich feature set of the LMR36503-Q1 is designed to simplify implementation for a wide range of automotive end equipments.

Documents

Technical documentation and resources