LM2670SX-ADJ/NOPB ,SIMPLE SWITCHER High Efficiency 3A Step-Down Voltage Regulator with Sync 7-DDPAK/TO-263 -40 to 125Features 3 DescriptionThe LM2670 series of regulators are monolithic1• Efficiency Up to 94%integrat ..
LM2670T-12 ,SIMPLE SWITCHER High Efficiency 3A Step-Down Voltage Regulator with SyncLM2670 SIMPLE SWITCHER High Efficiency 3A Step-Down Voltage Regulator with SyncOctober 2003LM2670®S ..
LM2670T-12 ,SIMPLE SWITCHER High Efficiency 3A Step-Down Voltage Regulator with SyncFeaturesn Efficiency up to 94%The LM2670 series of regulators are monolithic integratedcircuits whi ..
LM2670T-5.0 ,SIMPLE SWITCHER High Efficiency 3A Step-Down Voltage Regulator with SyncLM2670 SIMPLE SWITCHER High Efficiency 3A Step-Down Voltage Regulator with SyncOctober 2003LM2670®S ..
LM2670T-5.0 ,SIMPLE SWITCHER High Efficiency 3A Step-Down Voltage Regulator with SyncLM2670 SIMPLE SWITCHER High Efficiency 3A Step-Down Voltage Regulator with SyncOctober 2003LM2670®S ..
LM2671LD-3.3 ,SIMPLE SWITCHER Power Converter High Efficiency 500mA Step-Down Voltage Regulator with FeaturesFeaturesFebruary 2005LM2671®SIMPLE SWITCHER Power Converter High Efficiency500mA Step-Down Voltage ..
LM5008MM/NOPB ,9.5-95V Wide Vin, 350mA Constant On-Time Non-Synchronous Buck Regulator 8-VSSOP -40 to 125 SNVS280H–APRIL 2004–REVISED DECEMBER 20165 Pin Configuration and FunctionsDGK Package NGU Package8 ..
LM5008MMX/NOPB ,9.5-95V Wide Vin, 350mA Constant On-Time Non-Synchronous Buck Regulator 8-VSSOP -40 to 125features1• Integrated 100-V, N-Channel Buck Switchall of the functions needed to implement a low-co ..
LM5008SD ,High Voltage (100V) Step Down Switching RegulatorLM5008 High Voltage (100V) Step Down Switching RegulatorOctober 2004LM5008High Voltage (100V) Step ..
LM5008SD/NOPB ,9.5-95V Wide Vin, 350mA Constant On-Time Non-Synchronous Buck Regulator 8-WSON Block Diagram..... 712 Mechanical, Packaging, and Orderable7.3 Feature Description...... 8Informati ..
LM5009MM ,9.5-95V Wide Vin, 150mA Constant On-Time Non-Synchronous Buck Regulator 8-VSSOP -40 to 125 SNVS402H–FEBRUARY 2006–REVISED OCTOBER 20155 Pin Configuration and FunctionsDGK, NGU Packages8-Pin ..
LM5009MM/NOPB ,9.5-95V Wide Vin, 150mA Constant On-Time Non-Synchronous Buck Regulator 8-VSSOP -40 to 125features1• Integrated N-Channel MOSFETall of the functions needed to implement a low-cost,• 150-mA ..
LM2670SX-ADJ/NOPB
SIMPLE SWITCHER High Efficiency 3A Step-Down Voltage Regulator with Sync
Product
Folder
Sample &
Buy
Technical
Documents
Tools &
Software
Support &
Community
LM2670SNVS036K–APRIL 2000–REVISED JUNE 2016
LM2670 SIMPLE SWITCHER® High Efficiency 3-A Step-Down Voltage Regulator With Sync Features Efficiency Upto 94% Simple and Easyto Design With (Using Off-the-
Shelf External Components) 150-mΩ DMOS Output Switch 3.3-V, 5-V, 12-V Fixed Output and Adjustable
(1.2Vto37V) Versions 50-µA Standby Current When Switched OFF ±2% Maximum Output Tolerance Over Full Line
and Load Conditions Wide Input Voltage Range:8Vto40V External Sync Clock Capability
(280 kHzto 400 kHz) 260-kHz Fixed Frequency Internal Oscillator –40to 125°C Operating Junction Temperature
Range
Applications Simple-to-Design, High Efficiency (>90%) Step-
Down Switching Regulators Efficient System Preregulator for Linear Voltage
Regulators Battery Chargers Communications and Radio Equipment Regulator
With Synchronized Clock Frequency
DescriptionThe LM2670 series of regulators are monolithic
integrated circuits which provide all of the active
functions fora step-down (buck) switching regulator
capableof driving upto 3-A loads with excellent line
and load regulation characteristics. High efficiency
(>90%)is obtained through the useofa low ON-
resistance DMOS power switch. The series consists fixed output voltages of 3.3-V, 5-V, and 12-V
output version.
The SIMPLE SWITCHER® concept provides fora
complete design usinga minimum numberof external
components. The switching clock frequency can be
provided by an internal fixed frequency oscillator
(260 kHz)or from an externally provided clockin the
rangeof 280 kHzto 400 kHz which allows the useof
physically smaller sized components.A family of
standard inductors for use with the LM2670 are
available from several manufacturers to greatly
simplify the design process. The external sync clock
provides direct and precise controlof the output ripple
frequency for consistent filtering or frequency
spectrum positioning.
The LM2670 series also has built-in thermal
shutdown, current limiting and an ON/OFF control
input that can power down the regulatortoa low
50‑µA quiescent current standby condition. The
output voltageis ensuredtoa ±2% tolerance.
Device Information(1)(1) Forall available packages, see the orderable addendumat
the endofthe data sheet.
Typical Application
