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SIMPLE SWITCHER® DC/DC Converters

Award-winning SIMPLE SWITCHER DC/DC converters deliver robust power supplies with the minimum set of external components. All SIMPLE SWITCHER products work with the enhanced WEBENCH Power Designer end-to-end design and prototyping tools.

LM2267x/80

LM2267X/LM22680 SIMPLE SWITCHER Regulator Series

The LM2267x/LM22680 SIMPLE SWITCHER Step-Down Regulator Series is the next generation of highly popular LM267x SIMPLE SWITCHER Regulators. Numerous enhancements and improvements have been added such as an input range down to 4.5V, tighter output accuracy, adjustable switching frequency, a precision enable, and thermally enhanced green packages.

These new SIMPLE SWITCHER Regulators together with WEBENCH® Power Designer provide fast and easy design-in while delivering performance and flexibility to meet your design and application requirements.

LM2267x

Features

Wide Input Voltage Range from 4.5V - 42V
Load Currents from 0.5A – 5A
Adjustable and Fixed Output Voltages
Adjustable and Fixed Switching Frequencies (up to 1MHz) for optimal size and efficiency
External Soft Start
Precision Enable

Internally compensated voltage mode control minimizes external component count
V_out accurate within 2.0%, worst case
Adjustable current limit
Frequency Sync up to 1MHz
PSOP-8 and TO263-7 THIN packages

Product Information

Product ID	Eval Board App Notes	V_In (V)	I_Out (A)	Adj Cur Limit	Soft Start	Enable	Adj. Freq.	Package
Product ID	Eval Board App Notes	V_In (V)	I_Out (A)	Adj Cur Limit	Soft Start	Enable	Adj. Freq.	THIN TO-263	PSOP-8
LM22674	AN-1895	4.5-42	0.5
LM22671	AN-1895	4.5-42	0.5
LM22675	AN-1896	4.5-42	1.0
LM22672	AN-1896	4.5-42	1.0
LM22680	AN-1911	4.5-42	2.0
LM22670	AN-1885 AN-1888	4.5-42	3.0
LM22673	AN-1894	4.5-42	3.0
LM22676	AN-1885	4.5-42	3.0
LM22677	AN-1892	4.5-42	5.0
LM22678	AN-1892	4.5-42	5.0
LM22679	AN-1891	4.5-42	5.0

Note: All parts available with either fixed V_Out of 5.0V or adjustable V_Out of 1.285 - 30V

Design Resources

App Notes

AN-1888 - LM22670 Evaluation Board Inverting Topology and Application Notes
AN-1895 - LM22671 SIMPLE SWITCHER Buck Regulator Evaluation Board
AN-1889 - How to Measure the Loop Transfer Function of Power Supplies
AN-1911 - LM22680 SIMPLE SWITCHER Buck Regulator Evaluation Board
AN-1930 - SIMPLE SWITCHER® Regulators Take Over Automotive Applications
AN-1885 - LM22670 SIMPLE SWITCHER Buck Regulator Evaluation Board
AN-1891 - LM22679 SIMPLE SWITCHER Buck Regulator Evaluation Board
AN-1892 - LM22677 SIMPLE SWITCHER Buck Regulator Evaluation Board
AN-1894 - LM22673 SIMPLE SWITCHER Buck Regulator Evaluation Board
AN-1896 - LM22672 SIMPLE SWITCHER Buck Regulator Evaluation Board
Buck-Boost Topology Delivers Negative Output From Positive Input (EE Times)
SIMPLE SWITCHER® Design Guide