Features FlexCap: Stable with ceramic, tantalum, or aluminum capacitors Stable with 10 µF input/output capacitor Adjustable output voltage from 0.6V to 5V Low ground pin current 25 nA quiescent current in shutdown mode Guaranteed output current of 3A Available in TO-263, TO-263 THIN packages Guaranteed VADJ accuracy of ±1.5% @ 25°C (A Grade) Guaranteed VADJ accuracy of ±3.5% @ 25°C (STD) Over-Temperature and Over-Current protection −40°C to +125°C operating TJ range Enable pin (LP38501) Description National's FlexCap LDO's feature unique compensation that allows the use of any type of output capacitor with no limits on minimum or maximum ESR. The LP38501/3 series of low-dropout linear regulators operates from a +2.7V to +5.5V input supply. These ultra low dropout linear regulators respond very quickly to step changes in load, which makes them suitable for low voltage microprocessor applications. Developed on a CMOS process, (utilizing a PMOS pass transistor), the LP38501/3 has low quiescent current that changes little with load current. Ground Pin Current: Typically 2 mA at 3A load current. Disable Mode: Typically 25 nA quiescent current when the Enable pin is pulled low. Simplified Compensation: Stable with any type of output capacitor, regardless of ESR. Precision Output: "A" grade versions available with 1.5% VADJ tolerance (25°C) and 3% over line, load and temperature. Applications ASIC Power Supplies In:  Printers, Graphics Cards, DVD Players  Set Top Boxes, Copiers, Routers DSP and FPGA Power Supplies SMPS Regulator Conversion from 3.3V or 5V Rail

WEBENCH® LP38503     Min   Max   Range     Vin V    2.70 – 5.50V     Vout V    0.60 – 5.00V     Iout A    ≤ 3.00A     Ambient Temp °C    ≤ 100°C   Footprint BOM Cost Efficiency   What are WEBENCH® tools? Also Recommended LP38501-ADJ▲ 3A FlexCap LDO With Enable PSRR

Typical Application *click for larger image PSRR	Block Diagram *click for larger image LP38503-ADJ Block Diagram
Typical Performance *click for larger image LP38503 Dropout Voltage

Datasheets

Title		Size	Date	Other Language
	LP38503-ADJ 3A FlexCap Low Dropout Linear Regulator for 2.7V to 5.5V Inputs	383 Kbytes	30-Oct-09	日本語

Application Notes

Title		Size	Date	Other Language
	AN-1824: Application Note 1824 FlexCap Technology Simplifies LDO Design	196 Kbytes	23-Sep-08

Part Number(s) (NSID)	Top View	Availability	Current Reported Stock	Budgetary Pricing	Pack Size
LP38503ATJ-ADJ/NOPB RoHS Status	TO-263 THIN	Full production Lead Time: 6 weeks	Distributor Region Qty AVNET-EM Worldwide 1712 DIGI-KEY Worldwide 1564	$0.95 each at 1K+ pcs	reel of 1000
LP38503TJ-ADJ/NOPB RoHS Status	TO-263 THIN	Full production Lead Time: 6 weeks	Distributor Region Qty ARROW Worldwide 1000 DIGI-KEY Worldwide 1132 MOUSER Worldwide 970 TAYLOR Americas 1000	$0.95 each at 1K+ pcs	reel of 1000
LP38503TS-ADJ/NOPB RoHS Status	TO-263	Full production Lead Time: 6 weeks	Distributor Region Qty ARROW Worldwide 310 AVNET-EM Worldwide 795 DIGI-KEY Worldwide 484 FARNELL Europe and Asia 293 MOUSER Worldwide 270 NEWARK Americas 293 TAYLOR Americas 310	$0.95 each at 1K+ pcs	rail of 45
LP38503TSX-ADJ/NOPB RoHS Status	TO-263	Full production Lead Time: 6 weeks	Distributor Region Qty AVNET-EM Worldwide 500 CEAC Asia Pacific 1000 DIGI-KEY Worldwide 0	$0.95 each at 1K+ pcs	reel of 500

All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/en/packaging/leadfree.html.

Moisture Sensitivity Level Data for LP38503-ADJ.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.

National's certificate of product compliance for LP38503-ADJ is located at RoHS Status.

Part Number(s) (NSID)	Weight (milligrams)	Type	Pins	MSL Rating	Peak Reflow	RoHS Status	CAD Symbols	Models	Package Marking Format
LP38503ATJ-ADJ/NOPB	789.308	TO-263 THIN	5	1	260	Detail	N/A	N/A	NSUZXYTTE# LP38503A TJ-ADJ
LP38503TJ-ADJ/NOPB	789.308 789.308	TO-263 THIN	5	1	260	Detail	N/A	N/A	NSUZXYTTE# LP38503 TJ-ADJ
LP38503TS-ADJ/NOPB	1448.647 N/A	TO-263	5	3	245	Detail	N/A	N/A	NSUZXYTTE# LP38503 TS-ADJ
LP38503TSX-ADJ/NOPB	1448.647 N/A	TO-263	5	3	245	Detail	N/A	N/A	NSUZXYTTE# LP38503 TS-ADJ

All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/en/packaging/leadfree.html.

Moisture Sensitivity Level Data for LP38503-ADJ.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.

National's certificate of product compliance for LP38503-ADJ is located at RoHS Status.

CAD Symbols and Models N/A

Models N/A

Reliability Metrics

Part Number	Process	EFR Reject	EFR Sample Size	PPM	LTA Rejects	LTA Device Hours	FITS	MTTF (Hours)
LP38503ATJ-ADJ	CMOS7	0	21301	0	0	1584000	3	449464325
LP38503TJ-ADJ	CMOS7	0	21301	0	0	1584000	3	449464325
LP38503TS-ADJ	CMOS7	0	21301	0	0	1584000	3	449464325
LP38503TSX-ADJ	CMOS7	0	21301	0	0	1584000	3	449464325

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.

All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/en/packaging/leadfree.html.

Moisture Sensitivity Level Data for LP38503-ADJ.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.

National's certificate of product compliance for LP38503-ADJ is located at RoHS Status.