Features • 5V output within 1.2% over temperature (A grade) • Adjustable 1.23 to 29V output voltage available (LP2954IM and LP2954AIM) • Guaranteed 250 mA output current • Extremely low quiescent current • Low dropout voltage • Reverse battery protection • Extremely tight line and load regulation • Very low temperature coefficient • Current and thermal limiting • Pin compatible with LM2940 and LM340 (5V version only) • Adjustable version adds error flag to warn of output drop and a logic-controlled shutdown 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 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. Applications • High-efficiency linear regulator • Low dropout battery-powered regulator

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Datasheet

Title		Size	Date	Other Language
	LP2954/LP2954A 5V and Adjustable Micropower Low-Dropout Voltage Regulators	802 Kbytes	2-May-05	日本語

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Reliability Metrics

Part Number	Process	EFR Reject	EFR Sample Size	PPM	LTA Rejects	LTA Device Hours	FITS	MTTF (Hours)
LP2954AIM	SLM	0	44046	0	0	3532500	1	1002356520
LP2954AIMX	SLM	0	44046	0	0	3532500	1	1002356520
LP2954AIS	SLM	0	44046	0	0	3532500	1	1002356520
LP2954AISX	SLM	0	44046	0	0	3532500	1	1002356520
LP2954AIT	SLM	0	44046	0	0	3532500	1	1002356520

Note: The Early Failure Rates (EFR) were calculated as point estimate PPM based on rejects and sample size for EFR. The Long Term Failure Rates were calculated at 60% confidence using the Arrhenius equation at 0.7eV activation energy and derating the assumed stress temperature of 150°C to an application temperature of 55°C.

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