LM3490 Datasheet | National Semiconductor

Description The LM3490 is an integrated linear voltage regulator. It features operation from an input as high as 30V and a guaranteed maximum dropout of 1.2V at the full 100 m A load. Standard packaging for the LM3490 is the 5-lead SOT-23 package. A logic-controlled ON/OFF feature makes the LM3490 ideal for powering subsystems ON and OFF as needed. The 5, 12, and 15V members of the LM3490 series are intended as tiny alternatives to industry standard LM78LXX series and similar devices. The 1.2V quasi low dropout of LM3490 series devices makes them a nice fit in many applications where the 2 to 2.5V dropout of LM78LXX series devices precludes their (LM78LXX series devices) use. The LM3490 series features a 3.3V member. The SOT packaging and quasi low dropout features of the LM3490 series converge in this device to provide a very nice, very tiny 3.3V, 100 m A bias supply that regulates directly off the system 5V ± 5% power supply. Key Specifications n 30V maximum input for operation n 1.2V guaranteed maximum dropout over full load and temperature ranges n 100 m A guaranteed load current n ± 5% guaranteed output voltage tolerance over full load and temperature ranges n - 40 to +125˚C junction temperature range for operation Features n 3.3, 5, 12, and 15V versions available n Logic-controlled ON/OFF n Packaged in the tiny 5-lead SOT-23 package Applications n n n n Tiny alternative to LM78LXX series and similar devices Tiny 5V ± 5% to 3.3V, 100 m A converter Post regulator for switching DC/DC converter Bias supply for analog circuits Typical Application Circuit DS100071-2 Connection Diagram DS100071-1 Top View SOT-23 Package 5-Lead, Molded-Plastic Small-Outline Transistor (SOT) Package Package Code MA05B(Note 1) © 1999 National Semiconductor Corporation DS100071 .national. Ordering Information Output Voltage (V) 3.3 3.3 5 5 12 12 15 15 Order Number (Note 2) LM3490IM5-3.3 LM3490IM5X-3.3 LM3490IM5-5.0 LM3490IM5X-5.0 LM3490IM5-12 LM3490IM5X-12 LM3490IM5-15...