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Precision Micropower Low Dropout Voltage Reference
LM4125
Precision Micropower Low Dropout V oltage Reference
General DescriptionThe LM4125isa precision low power low dropout bandgap
voltage reference withupto5 mA output current source and
sink capability.
This series reference operates with input voltagesas lowas andupto6V consuming 160µA (Typ.) supply current.In
power down mode, device current dropsto less than2 µA.
The LM4125 comesin two grades(A and Standard) and
three voltage optionsfor greater flexibility. The best grade
devices(A) havean initial accuracyof 0.2%, while the stan-
dard havean initial accuracyof 0.5%, both witha tempcoof
50ppm/˚C guaranteed from −40˚Cto +125˚C.
The very low dropout voltage, low supply current and power-
down capabilityofthe LM4125 makes this productan ideal
choicefor battery powered and portable applications.
The device performanceis guaranteed over the industrial
temperature range (−40˚Cto +85˚C), while certain specs are
guaranteed over the extended temperature range (−40˚Cto
+125˚C). Please contact Nationalforfull specifications over
the extended temperature range. The LM4125is availablein standard 5-pin SOT-23 package.
Features Small SOT23-5 package Low dropout voltage: 120 mV Typ@ 1mA High output voltage accuracy: 0.2% Source and Sink current output: ±5mA Supply current: 160µA Typ. Low Temperature Coefficient: 50 ppm/˚C Fixed output voltages: 2.048, 2.5,and 4.096 Industrial temperature Range: −40˚Cto +85˚C (For extended temperature range, −40˚Cto 125˚C,
contact National Semiconductor)
Applications Portable, battery powered equipment Instrumentation and process control Automotive& Industrial Test equipment Data acquisition systems Precision regulators Battery chargers Base stations Communications Medical equipment
Connection DiagramRefertothe Ordering Information Tableinthis Data Sheetfor Specific Part Number
SOT23-5 Surface Mount Package
November 2003
LM4125
Precision
Micropower
Low
Dropout
oltage
Reference
