Features • Integrated 80V, 0.7A N-Channel Buck Switch • Internal HV Vcc Regulator • No Control Loop Compensation Required • Ultra-Fast Transient Response • On Time Varies Inversely with Line Voltage • Operating Frequency Nearly Constant with Varying Line Voltage • Adjustable Output Voltage • Highly Efficient Operation • Precision Reference • Low Bias Current • Intelligent Current Limit Protection • Thermal Shutdown • External Shutdown Control Description The LM5007 Step Down Switching Regulator features all of the functions needed to implement low cost, efficient, Buck bias regulators. This high voltage regulator contains an 80 V, 0.7A N-Channel Buck Switch. The device is easy to apply and is provided in the MSOP-8 and the thermally enhanced LLP-8 packages. The regulator is based on a hysteretic control scheme using an on time inversely proportional to VIN. This feature allows the operating frequency to remain relatively constant with load and input voltage variations. The hysteretic control requires no control loop compensation, while providing very fast load transient response. An intelligent current limit is implemented in the LM5007 with forced off time that is inversely proportional to VOUT. This current limiting scheme reduces load current foldback. Additional protection features include: Thermal Shutdown, Vcc undervoltage lockout, gate drive undervoltage lockout, and Max Duty Cycle limiter.

LM5007   9.00 <= V in Lower  V   <= V in Upper  V   <= 75.00 V out 2.50 <=  V <= 75.00 I out    A <= 0.50 Ambient Temperature  °C <= 100 What are WEBENCH® tools? Also Recommended LM2597HV▲ 0.5A 60V Simple Switcher W/ Pgood LM5008▲ 100V 350mA Switching Regulator LM5010▲ 1A 80V Switching Regulator LM2936 LM2936 - 60V 50mA Linear Regulator LM317HV 60V 1.5A Linear Regulator LM5007EP Higher Temperature Enhanced Plastic Version MY BRIEFCASE                                       Click any "Briefcase" icon to add an item

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

Datasheets

Title		Size	Date	Other Language
	LM5007 High Voltage (80V) Step Down Switching Regulator	281 Kbytes	5-Feb-08

Featured Application Notes

Title		Size	Date	Other Language
	AN-1298: Application Note 1298 LM5007 Evaluation Board	313 Kbytes	29-Jan-04
	AN-1319: Application Note 1319 Analysis and Design of a Hysteretic Constant Frequency Buck Regulator Using the LM5007	426 Kbytes	25-May-04	中文
	AN-1634: Application Note 1634 Starting Up A Buck Regulator With a Voltage Present At V OUT	71 Kbytes	17-May-07	日本語 中文

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	AN-1956: Application Note 1956 LM5001 Boost Evaluation Board	838 Kbytes	4-Mar-09
	AN-1481: Application Note 1481 Controlling Output Ripple and Achieving ESR Independence in Constant On-Time (COT) Regulator Designs	574 Kbytes	27-Sep-06	日本語 中文
	AN-1445: Application Note 1445 LM5009 Evaluation Board	479 Kbytes	23-Jul-08
	AN-1588: Application Note 1588 LM5001 Evaluation Board	658 Kbytes	18-Mar-07
	AN-1748: Application Note 1748 LM5005 Evaluation Board	159 Kbytes	7-Nov-07
	AN-1574: Application Note 1574 LM5073 Evaluation Board	464 Kbytes	24-Apr-07
	AN-1330: Application Note 1330 LM5008 Evaluation Board	334 Kbytes	7-May-04
	AN-1630: Application Note 1630 LM5001 Non-Isolated Flyback Evaluation Board	250 Kbytes	17-Jun-09
	AN-1736: Application Note 1736 LM3433 HB LED Driver Evaluation Kit	1011 Kbytes	4-Feb-08
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Part Number(s) (NSID)	Top View	Availability	Current Reported Stock	Budgetary Pricing	Standard Pack Size
LM5007MM/NOPB LM5007MM RoHS Status	MINI SOIC	Full production Lead Time: 10 weeks	Distributor Region Qty ARROW Worldwide 361 AVNET-EM Worldwide 10000 DIGIKEY Worldwide 0 FARNELL Europe and Asia 4255 FUTURE Worldwide 656 NEWARK Americas 985 RS COMPONENTS Worldwide 305	$1.81 each at 1K+ pcs	reel of 1000
LM5007MMX/NOPB LM5007MMX RoHS Status	MINI SOIC	Full production Lead Time: 12 weeks	Distributor Region Qty ARROW Worldwide 3500 DIGIKEY Worldwide 0	$1.81 each at 1K+ pcs	reel of 3500
LM5007SD/NOPB LM5007SD RoHS Status	LLP	Full production Lead Time: 8 weeks	Distributor Region Qty AVNET-EM Worldwide 1000 DIGIKEY Worldwide 2069 FUTURE Worldwide 1100 NEWARK Americas 277	$1.81 each at 1K+ pcs	reel of 1000
LM5007SDX/NOPB RoHS Status	LLP	Full production Lead Time: 8 weeks	Distributor Region Qty DIGIKEY Worldwide 0	$1.81 each at 1K+ pcs	reel of 4500

Obsolete Versions

Obsolete Part	Alternate Part or Supplier	Source	Last Time Buy Date
LM5007MMEP	NONE	NATIONAL SEMICONDUCTOR	16 Nov 2008

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

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/quality/green.

National's certificate of product compliance is located at RoHS Status.

Part Number(s) (NSID)	Top View	Type	Pins	MSL Rating	Peak Reflow	RoHS Status	CAD Symbols	Models	Package Marking Format
LM5007MM/NOPB LM5007MM		MINI SOIC	8	1 1	260 260	Detail	Download	N/A	ZXTT S81B
LM5007MMX/NOPB LM5007MMX		MINI SOIC	8	1 1	260 260	Detail	Download	N/A	ZXTT S81B
LM5007SD/NOPB LM5007SD		LLP	8	1 1	260 260	Detail	Download	N/A	NS UZXYTT L00031B
LM5007SDX/NOPB		LLP	8	1	260	Detail	Download	N/A	NS UZXYTT L00031B

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

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/quality/green.

National's certificate of product compliance is located at RoHS Status.

Design Tools

Title	Size	Date
LM5007 Quick Start Calculator	358 Kbytes	13-Jul-2009
Article - Controller Monitors ORing FET Current and Voltage
Article - Negative Supply Uses Positive Hysteretic Regulator

Reference Design

LM5007 Reference Design - Buck Bias Converter: 18-42V Input, 13V @ 70 mA Output

LM5007 Reference Design - Buck Converter for Automotive Applications, 1 to 2 High Brightness LUXEON LEDs @ 350 mA

CAD Symbols and Models Download LM5007 CAD Symbols

Models N/A

LM5007   9.00 <= V in Lower  V   <= V in Upper  V   <= 75.00 V out 2.50 <=  V <= 75.00 I out    A <= 0.50 Ambient Temperature  °C <= 100 What are WEBENCH® tools?

Reliability Metrics

Part Number	Process	EFR Reject	EFR Sample Size	PPM	LTA Rejects	LTA Device Hours	FITS	MTTF (Hours)
LM5007MM	ABCD150XV1	0	3868	0	0	2595000	2	736338335
LM5007MMX	ABCD150XV1	0	3868	0	0	2595000	2	736338335
LM5007SD	ABCD150XV1	0	3868	0	0	2595000	2	736338335
LM5007SDX	ABCD150XV1	0	3868	0	0	2595000	2	736338335

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/packaging/leadfree.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/quality/green.

National's certificate of product compliance is located at RoHS Status.

Obsolete Versions

Obsolete Part	Alternate Part or Supplier	Source	Last Time Buy Date
LM5007MMEP	NONE	NATIONAL SEMICONDUCTOR	16 Nov 2008