LM2574DW-ADJR2G , 0.5 A, Adjustable Output Voltage, Step−Down Switching Regulator
LM2574HVM-1.2 ,SIMPLE SWITCHER 0.5A Step-Down Voltage Regulatorfeatures include a guaranteed 4 tolerance on out-n Positive to negative converter (Buck-Boost)put v ..
LM2574HVM-1.5 ,SIMPLE SWITCHER 0.5A Step-Down Voltage RegulatorLM2574/LM2574HV SIMPLE SWITCHER 0.5A Step-Down Voltage RegulatorJune 1999LM2574/LM2574HV™SIMPLE SWI ..
LM2574HVM-12 ,SIMPLE SWITCHER 0.5A Step-Down Voltage Regulatorfeatures include a guaranteed 4 tolerance on out-n Positive to negative converter (Buck-Boost)put v ..
LM2574HVM-15 ,SIMPLE SWITCHER 0.5A Step-Down Voltage RegulatorFeaturesn 3.3V, 5V, 12V, 15V, and adjustable output versionsThe LM2574 series of regulators are mon ..
LM2574HVM-3.3 ,SIMPLE SWITCHER 0.5A Step-Down Voltage RegulatorLM2574/LM2574HV SIMPLE SWITCHER 0.5A Step-Down Voltage RegulatorJune 1999LM2574/LM2574HV™SIMPLE SWI ..
LM4120IM5-5.0 ,Precision Micropower Low Dropout Voltage ReferenceApplicationsThe device performance is guaranteed over the industrialn Portable, battery powered equ ..
LM4120IM5X-1.8 ,Precision Micropower Low Dropout Voltage ReferenceBlock DiagramConnection DiagramDS101047-2Refer to the Ordering Information Table in this Data Sheet ..
LM4120IM5X-1.8 ,Precision Micropower Low Dropout Voltage ReferenceBlock DiagramConnection DiagramDS101047-2Refer to the Ordering Information Table in this Data Sheet ..
LM4120IM5X-1.8 ,Precision Micropower Low Dropout Voltage ReferenceLM4120 Precision Micropower Low Dropout Voltage ReferenceFebruary 2000LM4120Precision Micropower Lo ..
LM4120IM5X-1.8 ,Precision Micropower Low Dropout Voltage ReferenceLM4120 Precision Micropower Low Dropout Voltage ReferenceFebruary 2000LM4120Precision Micropower Lo ..
LM4120IM5X-2.0 ,Precision Micropower Low Dropout Voltage ReferenceFeaturesn Small SOT23-5 packageThe LM4120 is a precision low power low dropout bandgap@voltage refe ..
LM2574DW-ADJR2
0.5A, Adjustable Output Voltage, Step-Down Switching Regulator
LM2574
0.5 A, Adjustable Output
Voltage, Step-Down
Switching Regulator
The LM2574 series of regulators are monolithic integrated circuits
ideally suited for easy and convenient design of a step–down
switching regulator (buck converter). All circuits of this series are
capable of driving a 0.5 A load with excellent line and load regulation.
These devices are available in fixed output voltages of 3.3 V, 5.0 V,
12 V, 15 V, and an adjustable output version.
These regulators were designed to minimize the number of external
components to simplify the power supply design. Standard series of
inductors optimized for use with the LM2574 are offered by several
different inductor manufacturers.
Since the LM2574 converter is a switch–mode power supply, its
efficiency is significantly higher in comparison with popular
three–terminal linear regulators, especially with higher input voltages.
In most cases, the power dissipated by the LM2574 regulator is so low,
that the copper traces on the printed circuit board are normally the only
heatsink needed and no additional heatsinking is required.
The LM2574 features include a guaranteed ±4% tolerance on output
voltage within specified input voltages and output load conditions, and
±10% on the oscillator frequency (±2% over 0°C to +125°C). External
shutdown is included, featuring 60 μA (typical) standby current. The
output switch includes cycle–by–cycle current limiting, as well as
thermal shutdown for full protection under fault conditions.
Features 3.3 V, 5.0 V, 12 V, 15 V , and Adjustable Output Versions Adjustable Version Output Voltage Range, 1.23 to 37 V ±4% max
over Line and Load Conditions Guaranteed 0.5 A Output Current Wide Input Voltage Range: 4.75 to 40 V Requires Only 4 External Components 52 kHz Fixed Frequency Internal Oscillator TTL Shutdown Capability, Low Power Standby Mode High Efficiency Uses Readily Available Standard Inductors Thermal Shutdown and Current Limit Protection
Applications Simple and High–Efficiency Step–Down (Buck) Regulators Efficient Pre–regulator for Linear Regulators On–Card Switching Regulators Positive to Negative Converters (Buck–Boost) Negative Step–Up Converters Power Supply for Battery Chargers
