LM2670S-ADJ ,SIMPLE SWITCHER High Efficiency 3A Step-Down Voltage Regulator with SyncLM2670 SIMPLE SWITCHER High Efficiency 3A Step-Down Voltage Regulator with SyncOctober 2003LM2670®S ..
LM2670SD-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 ..
LM2670SD-3.3 ,SIMPLE SWITCHER High Efficiency 3A Step-Down Voltage Regulator with SyncLM2670 SIMPLE SWITCHER High Efficiency 3A Step-Down Voltage Regulator with SyncOctober 2003LM2670®S ..
LM2670SD-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 ..
LM2670SD-ADJ ,SIMPLE SWITCHER High Efficiency 3A Step-Down Voltage Regulator with SyncFeaturesn Efficiency up to 94%The LM2670 series of regulators are monolithic integratedcircuits whi ..
LM2670SDX-ADJ ,SIMPLE SWITCHER High Efficiency 3A Step-Down Voltage Regulator with SyncFeaturesn Efficiency up to 94%The LM2670 series of regulators are monolithic integratedcircuits whi ..
LM5007MMX ,High Voltage (80V) Step Down Switching RegulatorApplicationsn Non-Isolated Buck Regulatorn Secondary High Voltage Post Regulatorn +42V Automotive S ..
LM5007MMX/NOPB ,9-75V Wide Vin, 500mA Constant On-Time Non-Synchronous Buck Regulator 8-VSSOP -40 to 125features1• Integrated 80-V, 0.7-A N-Channel Buck Switchall of the functions needed to implement low ..
LM5007SD ,High Voltage (80V) Step Down Switching RegulatorFeaturesn Integrated 80V, 0.7A N-Channel Buck SwitchThe LM5007 Step Down Switching Regulator
LM5007SD ,High Voltage (80V) Step Down Switching RegulatorBlock Diagram20078301 2LM5007LM5007
LM5007SD/NOPB ,9-75V Wide Vin, 500mA Constant On-Time Non-Synchronous Buck Regulator 8-WSON -40 to 125features• External Shutdown Controlinclude: Thermal Shutdown, V undervoltageCClockout, gate drive u ..
LM5008MM ,High Voltage (100V) Step Down Switching Regulatorfeatures all ofthefunctionsneededtoimplementalowcost,efficient,Buck n Internal V regulatorCCbias re ..
LM2670S-3.3-LM2670S-5.0-LM2670S-ADJ-LM2670SD-12-LM2670SD-3.3-LM2670SD-5.0-LM2670SD-ADJ-LM2670SDX-ADJ-LM2670SX-ADJ-LM2670T-12-LM2670T-5.0
SIMPLE SWITCHER High Efficiency 3A Step-Down Voltage Regulator with Sync
LM2670
SIMPLE SWITCHER® High Efficiency 3A Step-Down
Voltage Regulator with Sync
General DescriptionThe LM2670 seriesof regulators are monolithic integrated
circuits which provideallof the active functionsfora step-
down (buck) switching regulator capableof drivingupto3A
loads with excellent line and load regulation characteristics.
High efficiency (>90%)is obtained through the useofa low
ON-resistance DMOS power switch. The series consistsof
fixed output voltagesof 3.3V,5V and 12V andan adjustable
output version.
The SIMPLE SWITCHER concept providesfora complete
design usinga minimum numberof external components.
The switching clock frequency canbe providedbyan inter-
nal fixed frequency oscillator (260KHz)or froman externally
provided clockin the rangeof 280KHzto 400Khz which
allows the useof physically smaller sized components.A
familyof standard inductorsfor use with the LM2670 are
available from several manufacturersto greatly simplify the
design process. The external Sync clock provides direct and
precise controlof the output ripple frequencyfor consistent
filteringor frequency spectrum positioning.
The LM2670 series also has builtin thermal shutdown,
current limiting andan ON/OFF control input that can power
downthe regulatortoa low 50µA quiescent current standby
condition. The output voltageis guaranteedtoa ±2% toler-
ance.
Features Efficiencyupto 94% Simple and easyto design with (using off-the-shelf
external components) 150 mΩ DMOS output switch 3.3V,5V and 12V fixed output and adjustable (1.2Vto
37V) versions 50µA standby current when switched OFF ±2%maximum output tolerance overfull line and load
conditions Wide input voltage range:8Vto 40V External Sync clock capability (280KHzto 400KHz) 260 KHz fixed frequency internal oscillator −40to +125˚C operating junction temperature range
Applications Simpleto design, high efficiency (>90%) step-down
switching regulators Efficient system pre-regulatorfor linear voltage
regulators Battery chargers Communications and radio equipment regulator with
synchronized clock frequency
Typical ApplicationOctober 2003
LM2670
SIMPLE
SWITCHER
High
Efficiency
Step-Down
oltage
Regulator
with
Sync
