Integrated Circuits (ICs)

LM3103MH/NOPB

Active

SYNCHRONOUS 1MHZ 0.75A STEP-DOWN VOLTAGE REGULATOR

Deep-Dive with AI

Search across all available documentation for this part.

DocumentsAN-1149 Layout Guidelines for Switching Power Supplies (Rev. C)AN-1678 LM3103 Demonstration Board Reference Design (Rev. A)+15

Integrated Circuits (ICs)

LM3103MH/NOPB

Active

Texas Instruments

SYNCHRONOUS 1MHZ 0.75A STEP-DOWN VOLTAGE REGULATOR

Deep-Dive with AI

DocumentsAN-1149 Layout Guidelines for Switching Power Supplies (Rev. C)AN-1678 LM3103 Demonstration Board Reference Design (Rev. A)+15

Specifications Series Pricing Description Documents

Technical Specifications

Parameters and characteristics for this part

Specification	LM3103MH/NOPB

Current - Output	750 mA
Frequency - Switching [Max]	1 MHz
Function	Step-Down
Mounting Type	Surface Mount
Number of Outputs	1
Operating Temperature [Max]	125 ¯C
Operating Temperature [Min]	-40 °C
Output Configuration	Positive
Output Type	Adjustable
Package / Case	16-PowerTSSOP
Package / Case	0.173 in, 4.4 mm Width
Supplier Device Package	16-HTSSOP
Synchronous Rectifier	True
Topology	Buck
Voltage - Input (Max) [Max]	42 V
Voltage - Input (Min) [Min]	4.5 V
Voltage - Output (Max) [Max]	7 V
Voltage - Output (Min/Fixed)	0.6 V

LM3103 Series

Part	Voltage - Input (Min) [Min]	Voltage - Input (Max) [Max]	Mounting Type	Current - Output	Operating Temperature [Min]	Operating Temperature [Max]	Output Configuration	Voltage - Output (Max) [Max]	Package / Case	Package / Case	Frequency - Switching [Max]	Voltage - Output (Min/Fixed)	Supplier Device Package	Topology	Function	Number of Outputs	Synchronous Rectifier	Output Type	Utilized IC / Part	Voltage - Input [Min]	Voltage - Input [Max]	Voltage - Output	Regulator Topology	Board Type	Outputs and Type	Outputs and Type	Main Purpose	Frequency - Switching	Supplied Contents
Texas Instruments LM3103MH/NOPB	4.5 V	42 V	Surface Mount	750 mA	-40 °C	125 ¯C	Positive	7 V	16-PowerTSSOP	0.173 in 4.4 mm Width	1 MHz	0.6 V	16-HTSSOP	Buck	Step-Down	1		Adjustable
Texas Instruments LM3103EVAL/NOPB				750 mA															LM3103	8 V	42 V	3.3 V	Buck	Fully Populated	Non-Isolated	1	DC/DC Step Down	500 kHz	Board(s)

Pricing

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

Distributor	Package	Quantity	$

Digikey	Tube	1	$ 4.82
		10	$ 4.33
		92	$ 3.55
		276	$ 3.36
		552	$ 3.02
		1012	$ 2.55
		2576	$ 2.42
Texas Instruments	TUBE	1	$ 3.64
		100	$ 3.19
		250	$ 2.23
		1000	$ 1.80

Description

General part information

LM3103 Series

The LM3103 Synchronously Rectified Buck Converter features all required functions to implement a highly efficient and cost effective buck regulator. It is capable of supplying 0.75 A to loads with an output voltage as low as 0.6 V. Dual N-Channel synchronous MOSFET switches allow a low component count, thus reducing complexity and minimizing board size.

Different from most other COT regulators, the LM3103 does not rely on output capacitor ESR for stability, and is designed to work exceptionally well with ceramic and other very low ESR output capacitors. It requires no loop compensation, results in a fast load transient response and simple circuit implementation. The operating frequency remains nearly constant with line variations due to the inverse relationship between the input voltage and the on-time. The operating frequency can be externally programmed up to 1 MHz. Protection features include VCCunder-voltage lock-out, output over-voltage protection, thermal shutdown, and gate drive under-voltage lock-out. The LM3103 is available in the thermally enhanced HTSSOP-16 package.