LM3478MMX ,High Efficiency Low-Side N-Channel Controller for Switching RegulatorPin DescriptionPin Name Pin Number DescriptionI 1 Current sense input pin. Voltage generated across ..
LM3478MMX NOPB ,40V Wide Vin Low-Side N-Channel Controller for Switching Regulator 8-VSSOP -40 to 125Block Diagram... 1212 Mechanical, Packaging, and Orderable7.3 Feature Description.... 12Information ..
LM348 ,Quad Operational Amplifiermaximum ratings over operating free-air temperature range (unless otherwise noted)Supply voltage, V ..
LM3480IM3-12 ,100 mA, SOT-23, Quasi Low-Dropout Linear Voltage RegulatorGeneral Description Key Specificationsn 30V maximum input for operationThe LM3480 is an integrated ..
LM3480IM3-12 ,100 mA, SOT-23, Quasi Low-Dropout Linear Voltage Regulatorfeatures of the LM3480 series
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LMS1485IM ,5V Low Power RS-485 Differential Bus TransceiverFeaturesn Meet ANSI standard RS-485-A and RS-422-BTheLMS1485isalowpowerdifferentialbus/linetranscei ..
LMS1485M ,5V Low Power RS-485 Differential Bus TransceiverPin DescriptionsPin # I/O Name Function> <1 O RO Receiver Output: If A B by 200 mV, RO will be high ..
LMS1487CM ,5V Low Power RS-485 / RS-422 Differential Bus Transceiverapplications with noisy environmentTypical Application20053001A Typical multipoint application is s ..
LMS1487CMX ,5V Low Power RS-485 / RS-422 Differential Bus TransceiverFeaturesn Meet ANSI standard RS-485-A and RS-422-BTheLMS1487isalowpowerdifferentialbus/linetranscei ..
LMS1487ECM ,5V Low Power RS-485 / RS-422 Differential Bus Transceiverapplicationsn Multipoint
LMS1487ECNA ,5V Low Power RS-485 / RS-422 Differential Bus Transceiverapplications in noisy environments. The LMS1487 is avail-n Network hubs, bridges, and routersable i ..
LM3478MM-LM3478MMX
High Efficiency Low-Side N-Channel Controller for Switching Regulator
LM3478
High Efficiency Low-Side N-Channel Controller for
Switching Regulator
General DescriptionThe LM3478isa versatile Low-Side N-FET switching regu-
lator controller.Itis suitablefor usein topologies requiring
low side FET, suchas boost, flyback, SEPIC, etc. Moreover,
the LM3478 canbe operatedat extremely high switching
frequencyin orderto reduce the overall solution size. The
switching frequencyof LM3478 canbe adjustedto any value
between 100kHz and 1MHzby usinga single external resis-
tor. Current mode control provides superior bandwidth and
transient response, besides cycle-by-cycle current limiting.
Output current canbe programmed witha single external
resistor.
The LM3478 has builtin features suchas thermal shutdown,
short-circuit protection, over voltage protection, etc. Power
saving shutdown mode reduces the total supply currentto
5µA and allows power supply sequencing. Internal soft-start
limitsthe inrush currentat start-up.
Key Specifications Wide supply voltage rangeof 2.97Vto 40V 100kHzto 1MHz Adjustable clock frequency ±2.5% (over temperature) internal reference 10µA shutdown current (over temperature)
Features 8-lead Mini-SO8 (MSOP-8) package Internal push-pull driver with1A peak current capability Current limit and thermal shutdown Frequency compensation optimized witha capacitor and resistor Internal softstart Current Mode Operation Undervoltage Lockout with hysteresis
Applications Distributed Power Systems Battery Chargers Offline Power Supplies Telecom Power Supplies Automotive Power Systems
Typical Application CircuitTypical High Efficiency Step-Up (Boost) Converter
May 2003
LM3478
High
Efficiency
Low-Side
N-Channel
Controller
for
Switching
Regulator
