LM3477AMM ,High Efficiency High-Side N-Channel Controller for Switching RegulatorPin DescriptionPin Name Pin Number DescriptionI 1 Current sense input pin. Voltage generated across ..
LM3477AMM ,High Efficiency High-Side N-Channel Controller for Switching RegulatorGeneral Descriptionn Frequency compensation optimized with a singleThe LM3477/Ais a high-side N-cha ..
LM3477AMM/NOPB ,High Efficiency High-Side N-Channel Controller for Switching Regulator 8-VSSOP -40 to 125Typical Application CircuitR Q1 L VSN OUT0.02: FDC653N 3.3PH 2.5V, 3ARFB120.5kCOUTCSN 47PFRFB20.1PF ..
LM3477AMMX ,High Efficiency High-Side N-Channel Controller for Switching RegulatorFeaturesprogrammed currentn 500kHz switching frequencylimitn Adjustable current limit*See Hystereti ..
LM3477MM ,High Efficiency High-Side N-Channel Controller for Switching RegulatorPin DescriptionPin Name Pin Number DescriptionI 1 Current sense input pin. Voltage generated across ..
LM3477MM/NOPB ,High Efficiency High-Side N-Channel Controller for Switching Regulator 8-VSSOP -40 to 125Electrical CharacteristicsSpecifications in Standard type face are for T = 25°C, and in bold type f ..
LMP8601MAX/NOPB ,60-V, Bidirectional, Low- or High-Side, Voltage Output Current Sensing Amplifier 8-SOIC -40 to 125Features 3 DescriptionThe LMP8601, LMP8602, LMP8603 (LMP860x) and1• Gain = 20x for LMP8601 and LMP8 ..
LMR12010XMK/NOPB ,SIMPLE SWITCHER? 20Vin, 1A Step-Down Voltage Regulator in SOT-23 6-SOT -40 to 125FEATURES DESCRIPTIONThe LMR12010 regulator is a monolithic, high23• Input Voltage Range of 3V to 20 ..
LMR14206XMKX/NOPB ,SIMPLE SWITCHER 42Vin, 0.6A Step-Down Voltage Regulator in SOT-23 6-SOT -40 to 125Electrical Characteristics.(2) If Military/Aerospace specified devices are required, please contact ..
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 ..
LM3477AMM-LM3477AMMX-LM3477MM-LM3477MMX
High Efficiency High-Side N-Channel Controller for Switching Regulator
LM3477
High Efficiency High-Side N-Channel Controller for
Switching Regulator
General DescriptionThe LM3477/Aisa high-side N-channel MOSFET switching
regulator controller.It canbe usedin topologies requiringa
high side MOSFET suchas buck, inverting (buck-boost) and
zeta regulators. The LM3477/A’s internal push pull driver
allows compatibility witha wide rangeof MOSFETs. This,the
wide input voltage range, useof discrete power components
and adjustable current limit allows the LM3477/Atobe opti-
mizedfora wide varietyof applications.
The LM3477/Ausesa high switching frequencyof 500kHzto
reduce the overall solution size. Current-mode control re-
quires onlya single resistor and capacitorfor frequency
compensation. The current mode architecture also yields
superior line and load regulation and cycle-by-cycle current
limiting.A 5µA shutdown state canbe usedfor power sav-
ings andfor power supply sequencing. Other featuresin-
clude internal soft-start and output over voltage protection.
The internal soft-start reduces inrush current. Over voltage
protectionisa safety featureto ensure that the output volt-
age stays within regulation.
The LM3477Ais similarto the LM3477. The primary differ-
ence between the twois the pointat which the device
transitions into hysteretic mode. The hysteretic thresholdof
the LM3477Ais one-thirdof the LM3477.
Features 500kHz switching frequency Adjustable current limit 1.5% reference Thermal shutdown Frequency compensation optimized witha single
capacitor and resistor Internal softstart Current mode operation Undervoltage lockout with hysteresis 8-lead Mini-SO8 (MSOP-8) package
Applications Local Voltage Regulation Distributed Power Notebook and Palmtop Computers Internet Appliances Printers and Office Automation Battery operated Devices Cable Modems Battery Chargers
Hysteretic
Threshold
LM3477 ) 36%of
programmed current
limit
LM3477A ) 12%of
programmed current
limit
*See Hysteretic Thresholdand sectionfor more information.
Typical Application CircuitTypical High Efficiency Step-Down (Buck) Converter
July 2004
LM3477
High
Efficiency
High-Side
N-Channel
Controller
for
Switching
Regulator
