Features • Output voltage adjusts from 1.23V to 29V • Guaranteed 250 mA output current • Extremely low quiescent current • Low dropout voltage • Extremely tight line and load regulation • Very low temperature coefficient • Current and thermal limiting • Reverse battery protection • 50 mA (typical) output pulldown crowbar • 5V and 3.3V versions available Description The LP2952 and LP2953 are micropower voltage regulators with very low quiescent current (130 µA typical at 1 mA load) and very low dropout voltage (typ. 60 mV at light load and 470 mV at 250 mA load current). They are ideally suited for battery-powered systems. Furthermore, the quiescent current increases only slightly at dropout, which prolongs battery life. The LP2952 and LP2953 retain all the desirable characteristics of the LP2951, but offer increased output current, additional features, and an improved shutdown function. The internal crowbar pulls the output down quickly when the shutdown is activated. The error flag goes low if the output voltage drops out of regulation. Reverse battery protection is provided. The internal voltage reference is made available for external use, providing a low-T.C. reference with very good line and load regulation. The parts are available in DIP and surface mount packages. Applications • Auxiliary comparator included with CMOS/TTL compatible output levels. Can be used for fault detection, low input line detection, etc. • High-efficiency linear regulator • Regulator with under-voltage shutdown • Low dropout battery-powered regulator • Snap-ON/Snap-OFF regulator

Also Recommended LP2956▲ Adds Second Regulator Output. MY BRIEFCASE                                       Click any "Briefcase" icon to add an item

Typical Application click for larger image	Block Diagram click for larger image
Typical Performance click for larger image

Datasheet

Title		Size	Date	Other Language
	LP2952/LP2952A/LP2953/LP2953A Adjustable Micropower Low-Dropout Voltage Regulators	1050 Kbytes	11-Mar-05	日本語

Featured Application Notes

Title		Size	Date	Other Language
	AN-1706: Application Note 1706 LMX9838 Firmware Release Note	557 Kbytes	13-Sep-07
	AN-1699: Application Note 1699 LMX9838 Software Users Guide	4816 Kbytes	17-Mar-08
	AN-1709: Application Note 1709 LMX9838 Bluetooth® (PRD 2.0) Qualification Guideline	934 Kbytes	25-Sep-07
	AN-1700: Application Note 1700 LMX9838 Cable Replacement	185 Kbytes	7-Sep-07

More Application Notes

Title		Size	Date	Other Language
	AN-1811: Application Note 1811 Bluetooth Antenna Design	2736 Kbytes	12-Mar-08

Part Number(s) (NSID)	Top View	Availability	Current Reported Stock	Budgetary Pricing	Standard Pack Size
LP2953AIM/NOPB RoHS	SOIC NARROW	Full production Lead Time: 8 weeks	Distributor Region Qty AVNET-EM Worldwide 105 DIGIKEY Worldwide 208 FUTURE Worldwide 192 NEWARK Americas 161	$1.97 each at 1K+ pcs	rail of 48
LP2953IM/NOPB LP2953IM RoHS	SOIC NARROW	Full production Lead Time: 8 weeks	Distributor Region Qty AVNET-EM Worldwide 142 DIGIKEY Worldwide 280 FUTURE Worldwide 286 NEWARK Americas 69	$1.10 each at 1K+ pcs	rail of 48
LP2953AIMX/NOPB RoHS	SOIC NARROW	Full production Lead Time: 8 weeks	Distributor Region Qty DIGIKEY Worldwide 0	$1.97 each at 1K+ pcs	reel of 2500
LP2953IMX/NOPB LP2953IMX RoHS	SOIC NARROW	Full production Lead Time: 8 weeks	Distributor Region Qty DIGIKEY Worldwide 0	$1.10 each at 1K+ pcs	reel of 2500
LP2953IN/NOPB RoHS	MDIP	Full production Lead Time: 8 weeks	Distributor Region Qty ARROW Worldwide 225 DIGIKEY Worldwide 0 NEWARK Americas 101 RS COMPONENTS Worldwide 28	$1.26 each at 1K+ pcs	rail of 20

Obsolete Versions

Obsolete Part	Alternate Part or Supplier	Source	Last Time Buy Date
LP2953AI MWC	NONE	NATIONAL SEMICONDUCTOR	03 Dec 2008
LP2953AIM-3.3	NONE	NATIONAL SEMICONDUCTOR	16 Nov 2008
LP2953AIMX-3.3	NONE	NATIONAL SEMICONDUCTOR	16 Nov 2008
LP2953AMJ/883	NONE	NATIONAL SEMICONDUCTOR	03 Dec 2008
LP2953IM-3.3	NONE	NATIONAL SEMICONDUCTOR	16 Nov 2008

Reliability Metrics

Part Number	Process	EFR Reject	EFR Sample Size	PPM	LTA Rejects	LTA Device Hours	FITS	MTTF (Hours)
LP2953AIM	SLM	0	44046	0	0	3532500	1	1002356520
LP2953AIM-3.3	SLM	0	44046	0	0	3532500	1	1002356520
LP2953AIMX	SLM	0	44046	0	0	3532500	1	1002356520
LP2953IM	SLM	0	44046	0	0	3532500	1	1002356520
LP2953IMX	SLM	0	44046	0	0	3532500	1	1002356520
LP2953IN	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.

For more information on Reliability Metrics, please click here.

Obsolete Versions

Obsolete Part	Alternate Part or Supplier	Source	Last Time Buy Date
LP2953AI MWC	NONE	NATIONAL SEMICONDUCTOR	03 Dec 2008
LP2953AIM-3.3	NONE	NATIONAL SEMICONDUCTOR	16 Nov 2008
LP2953AIMX-3.3	NONE	NATIONAL SEMICONDUCTOR	16 Nov 2008
LP2953AMJ/883	NONE	NATIONAL SEMICONDUCTOR	03 Dec 2008
LP2953IM-3.3	NONE	NATIONAL SEMICONDUCTOR	16 Nov 2008