LM3485MMX ,Hysteretic PFET Buck ControllerLM3485 Hysteretic PFET Buck ControllerSeptember 2004LM3485Hysteretic PFET Buck Controllern 4.5V to ..
LM3485MMX/NOPB ,4.5-35V, Hysteretic Non-Synchronous PFET Buck Controller 8-VSSOP -40 to 125Features 3 DescriptionThe LM3485 is a high-efficiency PFET switching1• Easy-to-Use Control Methodol ..
LM3485MMX/NOPB ,4.5-35V, Hysteretic Non-Synchronous PFET Buck Controller 8-VSSOP -40 to 125Maximum Ratings(1)over operating free-air temperature range (unless otherwise noted)MIN TYP MAX UNI ..
LM3487MMX , High Efficiency High-Side N-Channel Controller for Switching Regulator
LM3488MM ,High Efficiency Low-Side N-Channel Controller for Switching RegulatorPin DescriptionPin Name Pin Number DescriptionI 1 Current sense input pin. Voltage generated across ..
LM3488MM NOPB ,40V Wide Vin Low-Side N-Channel Controller for Switching Regulators 8-VSSOP -40 to 125Features 3 DescriptionThe LM3488 is a versatile low-side N-FET high-1• Automotive Grade Product, AE ..
LMS1585AIS-1.5 ,5A Low Dropout Fast Response RegulatorsFeaturesn Fast transient responseThe LMS1585A and LMS1587 are low dropout positive regu-lators with ..
LMS1585AIS-3.3 ,5A Low Dropout Fast Response RegulatorsLMS1585A/LMS1587 5A Low Dropout Fast Response RegulatorsJuly 2001LMS1585A/LMS15875A and 3A Low Drop ..
LMS1585AIS-ADJ ,5A Low Dropout Fast Response RegulatorsFeaturesn Fast transient responseThe LMS1585A and LMS1587 are low dropout positive regu-lators with ..
LMS1585AISADJEP ,Enhanced Plastic 5A Low Dropout Fast Response RegulatorsApplicationsbandgap reference, current limiting and thermal shutdown.The LMS1585AEP/87EPseries are ..
LMS1585AISX-3.3 ,5A Low Dropout Fast Response RegulatorsLMS1585A/LMS1587 5A Low Dropout Fast Response RegulatorsJuly 2001LMS1585A/LMS15875A and 3A Low Drop ..
LMS1585AIT-ADJ ,5A Low Dropout Fast Response Regulatorsapplications.n Industrial temp. range −40˚C to 125˚CThe LMS1585A/87 are available in adjustable ver ..
LM3485MM-LM3485MMX
Hysteretic PFET Buck Controller
LM3485
Hysteretic PFET Buck Controller
General DescriptionThe LM3485isa high efficiency PFET switching regulator
controller that canbe usedto quickly and easily developa
small, low cost, switching buck regulatorfora wide rangeof
applications. The hysteretic control architecture providesfor
simple design without any control loop stability concerns
usinga wide varietyof external components. The PFET
architecture also allowsfor low component countas wellas
ultra-low dropout, 100% duty cycle operation. Another ben-
efitis high efficiency operationat light loads withoutan
increasein output ripple.
Current limit protectionis providedby measuringthe voltage
acrossthe PFET’s RDS(ON), thus eliminating the needfora
sense resistor. The cycle-by-cycle current limit canbe ad-
justed witha single resistor, ensuring safe operation overa
rangeof output currents.
Features Easyto use control methodology No control loop compensation required 4.5Vto 35V wide input range 1.242Vto VIN adjustable output range High Efficiency 93% ±1.3% (±2% over temp) internal reference 100% duty cycle Maximum operating frequency> 1MHz Current limit protection MSOP-8
Applications Set-Top Box DSL/Cable Modem PC/IA Auto PC TFT Monitor Battery Powered Portable Applications Distributed Power Systems AlwaysOn Power
Typical Application CircuitSeptember 2004
LM3485
Hysteretic
PFET
Buck
Controller
