LP2954A Datasheet | National Semiconductor

Description The LP2954 is a 5V micropower voltage regulator with very low quiescent current (90 µA typical at 1 m A load) and very low dropout voltage (typically 60 m V at light loads and 470 m V at 250 m A load current). The quiescent current increases only slightly at dropout (120 µA typical), which prolongs battery life. The LP2954 with a fixed 5V output is available in the three-lead TO-220 and TO-263 packages. The adjustable LP2954 is provided in an 8-lead surface mount, small outline package. The adjustable version also provides a resistor network which can be pin strapped to set the output to 5V. Reverse battery protection is provided. The tight line and load regulation (0.04% typical), as well as very low output temperature coefficient make the LP2954 well suited for use as a low-power voltage reference. Output accuracy is guaranteed at both room temperature and over the entire operating temperature range. Features n 5V output within 1.2% over temperature (A grade) n Adjustable 1.23 to 29V output voltage available (LP2954IM and LP2954AIM) n Guaranteed 250 m A output current n Extremely low quiescent current n Low dropout voltage n Reverse battery protection n Extremely tight line and load regulation n Very low temperature coefficient n Current and thermal limiting n Pin patible with LM2940 and LM340 (5V version only) n Adjustable version adds error flag to warn of output drop and a logic-controlled shutdown Applications n High-efficiency linear regulator n Low dropout battery-powered regulator Package Outline and Ordering Information TO-220 3- Lead Plastic Package SO-8 Small Outline Surface Mount DS011128-2 Front View Order Number LP2954AIT or LP2954IT See NS Package T03B DS011128-33 Top View Order Number LP2954AIM or LP2954IM See NS Package M08A © 1999 National Semiconductor Corporation DS011128 .national. Package Outline and Ordering Information (Continued) TO-263 3-Lead Plastic Surface-Mount Package DS011128-9 Top View DS011128-10 Side View...