LM3485 ,Hysteretic PFET Buck ControllerPin DescriptionPin Name Pin Number DescriptionISENSE 1 The current sense input pin. This pin should ..
LM3485MM ,Hysteretic PFET Buck ControllerPin DescriptionPin Name Pin Number DescriptionISENSE 1 The current sense input pin. This pin should ..
LM3485MM/NOPB ,4.5-35V, Hysteretic Non-Synchronous PFET Buck Controller 8-VSSOP -40 to 125Block Diagram... 10Information..... 217.3 Feature Description.... 104 Revision HistoryNOTE: Page nu ..
LM3485MM/NOPB ,4.5-35V, Hysteretic Non-Synchronous PFET Buck Controller 8-VSSOP -40 to 125 SNVS178H–JANUARY 2002–REVISED DECEMBER 20155 Pin Configuration and FunctionsDGK Package8-Pin VSSOP ..
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 ..
LMS1585ACSX-1.5 ,5A and 3A Low Dropout Fast Response RegulatorsLMS1585A/LMS1587 5A Low Dropout Fast Response RegulatorsJune 2005LMS1585A/LMS15875A and 3A Low Drop ..
LMS1585ACSX-3.3 ,5A Low Dropout Fast Response RegulatorsLMS1585A/LMS1587 5A Low Dropout Fast Response RegulatorsJuly 2001LMS1585A/LMS15875A and 3A Low Drop ..
LMS1585ACSX-ADJ ,5A Low Dropout Fast Response RegulatorsLMS1585A/LMS1587 5A Low Dropout Fast Response RegulatorsJuly 2001LMS1585A/LMS15875A and 3A Low Drop ..
LMS1585ACT-1.5 ,5A Low Dropout Fast Response RegulatorsLMS1585A/LMS1587 5A Low Dropout Fast Response RegulatorsJuly 2001LMS1585A/LMS15875A and 3A Low Drop ..
LMS1585ACT-3.3 ,5A Low Dropout Fast Response RegulatorsFeaturesn Fast transient responseThe LMS1585A and LMS1587 are low dropout positive regu-lators with ..
LMS1585ACT-ADJ ,5A Low Dropout Fast Response Regulatorsapplications.n Industrial temp. range −40˚C to 125˚CThe LMS1585A/87 are available in adjustable ver ..
LM3485
Hysteretic PFET Buck Controller
LM3485
Hysteretic PFET Buck Controller
General DescriptionThe LM3485isa high efficiency PFET switching regulator
controller thata system designer can useto quickly and
easily developa small, low cost, switching buck regulatorfor wide rangeof applications. The useofa hysteretic control
scheme providesfor simple design without any control loop
stability concerns usinga wide varietyof external compo-
nents. The PFET architecture also allowsfor low component
countas wellas ultra-low dropout operation. Another benefit high efficiency operationat light loads withoutan increase output ripple. Current limit protection circuitis providedby
measuringthe voltage acrossthe PFET’s RDSON thus elimi-
natinga costly sense resistor. The current limit canbe ad-
justed allowingfor designsat various output currents and
costs.
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 CircuitMay 2002
LM3485
Hysteretic
PFET
Buck
Controller
