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LP2954IM Datasheet(PDF) 1 Page - National Semiconductor (TI) |
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LP2954IM Datasheet(HTML) 1 Page - National Semiconductor (TI) |
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1 / 13 page  LP2954/LP2954A 5V and Adjustable Micropower Low-Dropout Voltage Regulators General Description The LP2954 is a 5V micropower voltage regulator with very low quiescent current (90 µA typical at 1 mA load) and very low dropout voltage (typically 60 mV at light loads and 470 mV at 250 mA 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 net- work 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 mA 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 compatible 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 DS011128-2 Front View Order Number LP2954AIT or LP2954IT See NS Package T03B SO-8 Small Outline Surface Mount DS011128-33 Top View Order Number LP2954AIM or LP2954IM See NS Package M08A June 1999 © 1999 National Semiconductor Corporation DS011128 www.national.com |
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