LM2674 Series

SIMPLE SWITCHER® 40V, 500mA Low Component Count Step-Down Regulator

Catalog

SIMPLE SWITCHER® 40V, 500mA Low Component Count Step-Down Regulator

Part	Frequency - Switching	Package / Case	Package / Case [y]	Package / Case [x]	Function	Supplier Device Package	Voltage - Input (Min) [Min]	Voltage - Output (Min/Fixed)	Number of Outputs	Output Type	Current - Output	Operating Temperature [Min]	Operating Temperature [Max]	Topology	Output Configuration	Mounting Type	Output Type	Voltage - Output (Max)	Package / Case	Package / Case
Texas Instruments LM2674MX-12/NOPB	260 kHz	8-SOIC	3.9 mm	0.154 in	Step-Down	8-SOIC	6.5 V	12 V	1	1.81 mOhm	500 mA	-40 °C	125 ¯C	Buck	Positive	Surface Mount
Texas Instruments LM2674LD-ADJ/NOPB	260 kHz	16-WFDFN Exposed Pad			Step-Down	16-WSON (5x5)	6.5 V	1.2 V	1		500 mA	-40 °C	125 ¯C	Buck	Positive	Surface Mount	Adjustable	37 V
Texas Instruments LM2674N-3.3/NOPB	260 kHz	8-DIP			Step-Down	8-PDIP	6.5 V	3.3 V	1	1.81 mOhm	500 mA	-40 °C	125 ¯C	Buck	Positive	Through Hole			0.3 in	7.62 mm
Texas Instruments LM2674M-12	260 kHz	8-SOIC	3.9 mm	0.154 in	Step-Down	8-SOIC	6.5 V	12 V	1	1.81 mOhm	500 mA	-40 °C	125 ¯C	Buck	Positive	Surface Mount
Texas Instruments LM2674M-ADJ/NOPB	260 kHz	8-SOIC	3.9 mm	0.154 in	Step-Down	8-SOIC	6.5 V	1.2 V	1		500 mA	-40 °C	125 ¯C	Buck	Positive	Surface Mount	Adjustable	37 V
Texas Instruments LM2674N-12/NOPB	260 kHz	8-DIP			Step-Down	8-PDIP	6.5 V	12 V	1	1.81 mOhm	500 mA	-40 °C	125 ¯C	Buck	Positive	Through Hole			0.3 in	7.62 mm
Texas Instruments LM2674LDX-5.0	260 kHz	16-WFDFN Exposed Pad			Step-Down	16-WSON (5x5)	6.5 V	5 V	1	1.81 mOhm	500 mA	-40 °C	125 ¯C	Buck	Positive	Surface Mount
Texas Instruments LM2674M-3.3/NOPB	260 kHz	8-SOIC	3.9 mm	0.154 in	Step-Down	8-SOIC	6.5 V	3.3 V	1	1.81 mOhm	500 mA	-40 °C	125 ¯C	Buck	Positive	Surface Mount
Texas Instruments LM2674MX-3.3/NOPB	260 kHz	8-SOIC	3.9 mm	0.154 in	Step-Down	8-SOIC	6.5 V	3.3 V	1	1.81 mOhm	500 mA	-40 °C	125 ¯C	Buck	Positive	Surface Mount
Texas Instruments LM2674N-12	260 kHz	8-DIP			Step-Down	8-PDIP	6.5 V	12 V	1	1.81 mOhm	500 mA	-40 °C	125 ¯C	Buck	Positive	Through Hole			0.3 in	7.62 mm

Catalog

SIMPLE SWITCHER® 40V, 500mA Low Component Count Step-Down Regulator

Key Features

• New product available:LMR36506 3 to 65-V, 0.6-A, 200-kHz to 2.2-MHz synchronous converterFor faster time to market:TPSM365R6 3 to 65-V, 0.6-A, 200-kHz to 2.2-MHz power moduleEfficiency up to 96%Available in 8-pin SOIC, PDIP, and 16-pin WSON packagesSimple and easy to design withRequires only five external componentsUses readily available standard inductors3-V, 5-V, 12-V, and adjustable output versions1.21-V to 37-V adjustable version output voltage range±1.5% maximum output voltage tolerance over line and load conditionsEnsured 500-mA output load current0.25-Ω DMOS output switch8-V to 40-V wide input voltage range260-kHz fixed frequency internal oscillatorTTL shutdown capability, low power standby modeThermal shutdown and current limit protectionCreate a custom design using theLM2674with theWEBENCH® Power DesignerNew product available:LMR36506 3 to 65-V, 0.6-A, 200-kHz to 2.2-MHz synchronous converterFor faster time to market:TPSM365R6 3 to 65-V, 0.6-A, 200-kHz to 2.2-MHz power moduleEfficiency up to 96%Available in 8-pin SOIC, PDIP, and 16-pin WSON packagesSimple and easy to design withRequires only five external componentsUses readily available standard inductors3-V, 5-V, 12-V, and adjustable output versions1.21-V to 37-V adjustable version output voltage range±1.5% maximum output voltage tolerance over line and load conditionsEnsured 500-mA output load current0.25-Ω DMOS output switch8-V to 40-V wide input voltage range260-kHz fixed frequency internal oscillatorTTL shutdown capability, low power standby modeThermal shutdown and current limit protectionCreate a custom design using theLM2674with theWEBENCH® Power Designer

Description

The LM2674 series of regulators are monolithic integrated circuits built with a LMDMOS process. These regulators provide all the active functions for a step-down (buck) switching regulator, capable of driving a 500-mA load current with excellent line and load regulation. These devices are available in fixed output voltages of 3.3 V, 5 V, 12 V, and an adjustable output version. Requiring a minimum number of external components, these regulators are simple to use and include patented internal frequency compensation and a fixed frequency oscillator. The LM2674 series operates at a switching frequency of 260 kHz, thus allowing smaller sized filter components than what is required with lower frequency switching regulators. Because of very high efficiency (> 90%), the copper traces on the printed-circuit board are the only heat sinking required. A family of standard inductors for use with the LM2674 are available from several different manufacturers. This feature greatly simplifies the design of switch-mode power supplies using these advanced ICs. Also included in the data sheet are selector guides for diodes and capacitors designed to work in switch-mode power supplies. The LM2674 series of regulators are monolithic integrated circuits built with a LMDMOS process. These regulators provide all the active functions for a step-down (buck) switching regulator, capable of driving a 500-mA load current with excellent line and load regulation. These devices are available in fixed output voltages of 3.3 V, 5 V, 12 V, and an adjustable output version. Requiring a minimum number of external components, these regulators are simple to use and include patented internal frequency compensation and a fixed frequency oscillator. The LM2674 series operates at a switching frequency of 260 kHz, thus allowing smaller sized filter components than what is required with lower frequency switching regulators. Because of very high efficiency (> 90%), the copper traces on the printed-circuit board are the only heat sinking required. A family of standard inductors for use with the LM2674 are available from several different manufacturers. This feature greatly simplifies the design of switch-mode power supplies using these advanced ICs. Also included in the data sheet are selector guides for diodes and capacitors designed to work in switch-mode power supplies.