LM78S40CN ,Universal Switching Regulator SubsystemLM78S40 Universal Switching Regulator SubsystemApril 1998LM78S40Universal Switching Regulator Subsy ..
LM78S40N ,Universal Switching Regulator Subsystem
LM7905 ,3-terminal 1A negative voltage regulator. Output current up to 1A. Output voltage -5V(typ).
LM7905 ,3-terminal 1A negative voltage regulator. Output current up to 1A. Output voltage -5V(typ).
LM7905 ,3-terminal 1A negative voltage regulator. Output current up to 1A. Output voltage -5V(typ).
LM7905 ,3-terminal 1A negative voltage regulator. Output current up to 1A. Output voltage -5V(typ).
LP5951MF-2.5 , LP5951 Micropower, 150mA Low-Dropout CMOS Voltage Regulator
LP5951MF-3.0 ,Micropower, 150mA Low-Dropout CMOS Voltage Regulator 5-SOT-23 -40 to 125 SNVS345G–JUNE 2006–REVISED DECEMBER 20145 Pin Configuration and FunctionsSOT-23 (DBV)5 PinsTop Vie ..
LP5951MF-3.3 ,Micropower, 150mA Low-Dropout CMOS Voltage Regulator 5-SOT-23 -40 to 125Maximum Ratings may cause permanent damage to the device. These are stress ratingsonly, which do no ..
LP5951MF-3.3 ,Micropower, 150mA Low-Dropout CMOS Voltage Regulator 5-SOT-23 -40 to 125Features 3 DescriptionThe LP5951 regulator is designed to meet the1• Input Voltage Range: 1.8 V to ..
LP5951MFX-1.3 , LP5951 Micropower, 150mA Low-Dropout CMOS Voltage Regulator
LP5951MFX-1.8 , LP5951 Micropower, 150mA Low-Dropout CMOS Voltage Regulator
LM78S40CN
Universal Switching Regulator Subsystem
LM78S40
Universal Switching Regulator Subsystem
General DescriptionThe LM78S40isa monolithic regulator subsystem consistingallthe active building blocks necessaryfor switching regu-
lator systems. The device consistsofa temperature com-
pensated voltage reference,a duty-cycle controllableoscilla-
torwithan active current limit circuit,an error amplifier, high
current, high voltage output switch,a power diodeandan
uncommitted operational amplifier.The devicecan driveex-
ternal NPNor PNP transistors when currentsin excessof
1.5Aor voltagesin excessof 40Vare required.The device
canbe usedfor step-down, step-upor inverting switching
regulatorsaswellasfor series pass regulators.It features
wide supply voltage range,low standby power dissipation,
high efficiencyandlow drift.Itis usefulforany stand-alone,
lowpart count switching systemand works extremelywellin
battery operated systems.
Features Step-up, step-downor inverting switching regulators Output adjustable from 1.25Vto 40V Peak currentsto 1.5A without external transistors Operation from 2.5Vto 40V input Low standby current drain80dBlineand load regulation High gain, high current, independentop amp Pulse width modulation withno double pulsing
Block and Connection DiagramsDS010057-2
16-LeadDIPDS010057-1
Top ViewApril 1998
LM78S40
Universal
Switching
Regulator
Subsystem©1998NationalSemiconductor Corporation DS010057
