LM3480_15 Datasheet, PDF (10/20 Pages) Texas Instruments – LM3480 100-mA, SOT-23, Quasi Low-Dropout Linear Voltage Regulator

LM3480
SNVS011H – JUNE 1999 – REVISED SEPTEMBER 2015
7 Detailed Description
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7.1 Overview
The LM3480 is an integrated linear voltage regulator with inputs that can be as high as 30 V. It ensures a
maximum dropout of 1.2 V at the full load of 100 mA. The LM3480 has different output options including 3.3-V, 5-
V, 12-V, and 15-V outputs, making LM3480 the tiny alternative to industry standard LM78Lxx series and similar
devices.
7.2 Functional Block Diagram
IN
OUT
Current
Limit
Thermal
Shutdown
NPN
PNP
+
Bandgap
Reference
LM3480
GND
7.3 Feature Description
7.3.1 3.3-V, 5-V, 12-V, and 15-V Versions Available
The 3.3-V, 5-V, 12-V, and 15-V versions of LM3480 series are intended as tiny alternatives to industry standard
LM78Lxx series and similar devices.
7.3.2 1.2-V Ensured Maximum Dropout
The 1.2-V quasi-low dropout of the LM3480 series devices make them a nice fit in many application where the 2-
V to 2.5-V dropout of LM78Lxx series devices precludes their use.
7.4 Device Functional Modes
7.4.1 Operation with V_IN = 5 V
The 3.3-V member of LM3480 can operate with an input of 5 V ±5%, its tiny SOT-23 package and quasi-low
dropout makes it suitable for providing a very tiny, 3.3-V, 100-mA bias supply from 5-V power supply.
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