LM2677S-ADJ ,SIMPLE SWITCHER High Efficiency 5A Step-Down Voltage Regulator with SyncFeaturesn Efficiency up to 92%The LM2677 series of regulators are monolithic integratedcircuits whi ..
LM2677SD-3.3 ,SIMPLE SWITCHER High Efficiency 5A Step-Down Voltage Regulator with SyncFeaturesn Efficiency up to 92%The LM2677 series of regulators are monolithic integratedcircuits whi ..
LM2677SD-5.0 ,SIMPLE SWITCHER High Efficiency 5A Step-Down Voltage Regulator with SyncFeaturesn Efficiency up to 92%The LM2677 series of regulators are monolithic integratedcircuits whi ..
LM2677SD-ADJ ,SIMPLE SWITCHER High Efficiency 5A Step-Down Voltage Regulator with SyncLM2677 SIMPLE SWITCHER High Efficiency 5A Step-Down Voltage Regulator with SyncOctober 2003LM2677®S ..
LM2677SDX-ADJ ,SIMPLE SWITCHER High Efficiency 5A Step-Down Voltage Regulator with SyncLM2677 SIMPLE SWITCHER High Efficiency 5A Step-Down Voltage Regulator with SyncOctober 2003LM2677®S ..
LM2677SX-5.0 ,SIMPLE SWITCHER High Efficiency 5A Step-Down Voltage Regulator with SyncLM2677 SIMPLE SWITCHER High Efficiency 5A Step-Down Voltage Regulator with SyncOctober 2003LM2677®S ..
LM5115AMT , Secondary Side Post Regulator/DC-DC Converter with Power-up/Power-down Tracking
LM5115MTC ,75V, Secondary Side Post Regulator/ Synchronous Buck Controller 16-TSSOP -40 to 125features include a low dropout(LDO) bias regulator, error amplifier, precisionreference, adaptive d ..
LM5115MTCX ,75V, Secondary Side Post Regulator/ Synchronous Buck Controller 16-TSSOP -40 to 125 SNVS343E –MARCH 2005–REVISED MARCH 2013Pin Descriptions (continued)Pin Name Description Applicatio ..
LM5115MTCX/NOPB ,75V, Secondary Side Post Regulator/ Synchronous Buck Controller 16-TSSOP -40 to 125Block DiagramVCCVBIAS 7V LDOREGULATORVCCLOGICUVLO7VTHERMALLIMITSYNCHBIVSYNC CC15 PA2.5kCLK2.5kHOR Q ..
LM5115SD/NOPB ,75V, Secondary Side Post Regulator/ Synchronous Buck Controller 16-WSON Connection DiagramCS 1 16 VBIASVOUT 2 15 HB116CS VBIASAGND 314 HO2 15CO 4 HS13V HBOUT EPCOMP 512 VC ..
LM5115SDX/NOPB ,75V, Secondary Side Post Regulator/ Synchronous Buck Controller 16-WSON FEATURES DESCRIPTIONThe LM5115 is a versatile switching regulator2• Self-Synchronization to Main Ch ..
LM2677S-12-LM2677S-5.0-LM2677S-ADJ-LM2677SD-3.3-LM2677SD-5.0-LM2677SD-ADJ-LM2677SDX-ADJ-LM2677SX-5.0-LM2677SX-ADJ-LM2677T-12-LM2677T-5.0-LM2677T-ADJ
SIMPLE SWITCHER High Efficiency 5A Step-Down Voltage Regulator with Sync
LM2677
SIMPLE SWITCHER® High Efficiency 5A Step-Down
Voltage Regulator with Sync
General DescriptionThe LM2677 seriesof regulators are monolithic integrated
circuits which provideallof the active functionsfora step-
down (buck) switching regulator capableof drivingupto5A
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 LM2677 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 LM2677 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 92% Simple and easyto design with (using off-the-shelf
external components) 100 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
LM2677
SIMPLE
SWITCHER
High
Efficiency
Step-Down
oltage
Regulator
with
Sync
