Features 2.25V to 5.5V Input Voltage Range 1.8V Fixed Output Voltage 800 mA Output Load Current +/- 2.5% VOUT Accuracy over Line, Load, and Full-Temperature Range from -40°C to +125°C Stable with tiny 10 µF ceramic capacitors 0.20% Output Voltage Load Regulation from 10 mA to 800 mA Enable pin ^Error Flag Indicates Status of Output Voltage 1 µA of Quiescent current in Shutdown 40dB of PSRR at 100 kHz Over-Temperature and Over-Current Protection TO263 and TO-263 THIN Surface Mount Packages Description The LP38511-1.8 Fast-Transient Response Low-Dropout Voltage Regulator offers the highest-performance in meeting AC and DC accuracy requirements for powering Digital Cores. The LP38511-1.8 uses a proprietary control loop that enables extremely fast response to change in line conditions and load demands. Output Voltage DC accuracy is guaranteed at ±2.5% over line, load and full temperature range from -40°C to +125°C. The LP38511-1.8 is designed for inputs from the 2.5V, 3.3V, and 5.0V rail, is stable with 10uF ceramic capacitors, and has a fixed 1.8V output. An Error Flag feature monitors the output voltage and notifies the system processor when the output voltage falls more than 15% below the nominal value. The LP38511-1.8 provides excellent transient performance to meet the demand of high performance digital core ASICs, DSPs, and FPGAs found in highly-intensive applications such as servers, routers/switches, and base stations. Applications Digital Core ASICs, FPGAs, and DSPs Servers Routers and Switches Base Stations Storage Area Networks DDR2 Memory

WEBENCH® LP38511     Min   Max   Range     VIN – V    2.25 – 5.50V     VOUT V    0.50 – 5.00V     IOUT A    ≤ 0.80A     Ambient Temp °C    ≤ 100°C   Footprint BOM Cost Efficiency What are WEBENCH® tools? LP38511 Typical Application

Typical Application click for larger image LP38511 Typical Application	Block Diagram click for larger image LP38511 Block Diagram
Typical Performance click for larger image

Parameters Values Output Current 800 mA Input Min Voltage 2.25 Volt Input Max Voltage 5.5 Volt Dropout Voltage 0.260 Volt Adjustable Output No Quiescent Current 7.5 mA PSRR 73 dB Voltage Noise (rms) 75 uV Ceramic Capacitors Stable Yes On/Off Pin Yes PowerGood / Error Flag Yes RegType LDO Temperature Min -40 deg C Temperature Max 125 deg C Output Voltage 1.800 Volt

Datasheets

Title		Size	Date	Other Language
	LP38511 800 mA Fast-Transient Response Low-Dropout Linear Voltage Regulator with Error Flag	357 Kbytes	6-Mar-09	日本語

Application Notes

Title		Size	Date	Other Language
	AN-1675: Application Note 1675 LP38511TS-1.8 Evaluation Board	437 Kbytes	5-Nov-07
	AN-1801: Application Note 1801 LP38511TJ-ADJ Evaluation Board	353 Kbytes	23-Jan-09
	AN-1770: Application Note 1770 LP38511MR-ADJ Evaluation Board	498 Kbytes	10-Apr-09

Part Number(s) (NSID)	Top View	Availability	Current Reported Stock	Budgetary Pricing	Pack Size
LP38511TJ-1.8/NOPB RoHS Status	TO-263 THIN	Full production Lead Time: 6 weeks	Distributor Region Qty DIGI-KEY Worldwide 1892 MOUSER Worldwide 1000	$0.60 each at 1K+ pcs	reel of 1000
LP38511TS-1.8/NOPB RoHS Status	TO-263	Full production Lead Time: 6 weeks	Distributor Region Qty ARROW Worldwide 450 DIGI-KEY Worldwide 549 MOUSER Worldwide 585 TAYLOR Americas 450	$0.60 each at 1K+ pcs	rail of 45
LP38511TSX-1.8/NOPB RoHS Status	TO-263	Full production Lead Time: 6 weeks	Distributor Region Qty DIGI-KEY Worldwide 0	$0.60 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 LP38511.

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 LP38511 is located at RoHS Status.

Part Number(s) (NSID)	Description	Availability	Current Reported Stock	Budgetary Pricing	Pack Size
LP38511MR-ADJEV/NOPB	LP38511 PSOP 800 mA Fast-Transient Response LDO with Error Flag Evaluation Board	Full production Lead Free (RoHS)	Distributor Region Qty DIGI-KEY Worldwide 0 MOUSER Worldwide 1	$35.00 each	1
Description: The LP38511MR-ADJ is an adjustable LDO linear regulator capable of supplying up to 800 mA of output current, and incorporates an Enable function. The device has been designed to work with 10 µF input and output ceramic capacitors. Footprints areas for CIN and COUT will allow for a variety of sizes. Each board is assembled and tested in the factory. This evaluation board has the PSOP-8 package mounted, and the output voltage is set to 1.20V. Contents: LP38511MR Evaluation Board Application Note 1770 for the LP38511MR-ADJ Evaluation Board LP38511-ADJ Datasheet

Part Number(s) (NSID)	Description	Availability	Current Reported Stock	Budgetary Pricing	Pack Size
LP38511TS-1.8EV	LP38511TS-1.8 800 mA Fast-Transient Response LDO with Error Flag Evaluation Board	Full production	Distributor Region Qty DIGI-KEY Worldwide 0	$30.00 each	1
This board is designed to enable the evaluation of the LP38511TS-1.8 voltage regulator. Features: 2.25V to 5.5V Input Range 1.8V Fixed Output Range 1.5A Output Load Current 800 mA Output Load Current ± 2.5% VOUT Accuracy over Line, Load, and Full-Temperature Range from -40°C to +125 °C Stable with 10 µF ceramic capacitors 0.20% Output Voltage Load Regulation from 10 mA to 800 mA Enable pin Error Flag Indicates Status of Output Voltage 1 µA of Quiescent Current in Shutdown 40dB of PSRR at 100 kHz Over-Temperature and Over-Current Protection TO263-5 Package Applications: Digital Core ASICs, FPGAs, and DSPs Servers Routers and Switches Base Stations Storage Area Networks DDR2 Memory Contents: A LP38511TS-1.8 Fully Assembled Evaluation Board A LP38511 Datasheet A LP38511TS-1.8 Evaluation Board Appnote

National Semiconductor follows the provisions of the Product Stewardship Guide for Customers (CSP-9-111C1) and Banned Substances and Materials of Interest Specification (CSP-9-111S2) for regulatory environmental compliance. Details may be found at: www.national.com/en/packaging/greennopb.html. Lead free products are RoHS compliant.

Lead Free product status is available through the search tool located here

Part Number(s) (NSID)	Weight (milligrams)	Type	Pins	MSL Rating	Peak Reflow	RoHS Status	CAD Symbols	Models	Package Marking Format
LP38511TJ-1.8/NOPB	789.308	TO-263 THIN	5	1	260	Detail	Download	N/A	NSUZXYTTE# L38511TJ -1.8
LP38511TS-1.8/NOPB	1448.647 N/A	TO-263	5	3	245	Detail	Download	N/A	NSUZXYTTE# LP38511 TS-1.8
LP38511TSX-1.8/NOPB	1448.647 N/A	TO-263	5	3	245	Detail	Download	N/A	NSUZXYTTE# LP38511 TS-1.8

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 LP38511.

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 LP38511 is located at RoHS Status.

CAD Symbols and Models Download LP38511 CAD Symbols

Models N/A

Reliability Metrics

Part Number	Process	EFR Reject	EFR Sample Size	PPM	LTA Rejects	LTA Device Hours	FITS	MTTF (Hours)
LP38511TJ-1.8	CMOS7	0	21301	0	0	1584000	3	449464325
LP38511TS-1.8	CMOS7	0	21301	0	0	1584000	3	449464325
LP38511TSX-1.8	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 LP38511.

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 LP38511 is located at RoHS Status.