LM5007   
High Voltage (80V) Step Down Switching Regulator 		Click link to Download

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.

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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


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                                              LM5007
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Also Recommended
LM2597HV▲0.5A 60V Simple Switcher W/ Pgood
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LM5010▲1A 80V Switching Regulator
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LM317HV60V 1.5A Linear Regulator
LM5007EPHigher Temperature Enhanced Plastic Version

Block Diagram
*click for larger image



Typical Performance
*click for larger image


Paramaters / ValuesLM5007 LM2597HV LM5008 LM5010
Output Current500 mA 500 mA 350 mA 1000 mA
Input Min Voltage9 Volt 4.5, 7, 4.75, 15 Volt 9.5 Volt 8 Volt
Input Max Voltage75 Volt 60 Volt 95 Volt 75 Volt
Output Min2.5 Volt 3.3, 1.23, 12, 5 Volt 2.5 Volt 2.5 Volt
Output Max73 Volt 57, 3.3, 12, 5 Volt 75 Volt 70 Volt
Frequency Min50 kHz 150 kHz 50 kHz 50 kHz
Frequency Max800 kHz 150 kHz 600 kHz 1000 kHz
Efficiency (peak)93 % 88, 80, 82 % 92 % 91 %
On/Off PinYes Yes Yes Yes
Error FlagNo Yes No No
SoftStartNo Yes No Yes
Sync PinNo No No No
InvertingYes Yes Yes Yes
FlybackNo No No No
RegTypeSwitching Regulator Switching Regulator Switching Regulator Switching Regulator
Temperature Min-40 deg C -40 deg C -40 deg C -40 deg C
Temperature Max125 deg C 125 deg C 125 deg C 125 deg C
Adjustable OutputYes Yes, No Yes Yes
Adj Switch FrequencyYes No Yes Yes
PWM ModeConstant on-time Voltage Constant on-time Constant on-time
TopologyBuck Buck Buck Buck
Special FeaturesInternal startup regulator for Vin>9V, internal 80V/0.7A N-FET, Pull Ron pin to ground for shutdown SIMPLE SWITCHER regulator, error output delay Internal startup regulator for Vin>9V, internal 100V/0.5A N-FET, Pull Ron pin to ground for shutdown No compensation required, ultra-fast transient response
Step-DownYes Yes Yes Yes
Multiple Output CapabilityNo No No No
Output PowerUndefined Watt Undefined Watt Undefined Watt Undefined Watt
Output VoltageUndefined Volt 3.3, Undefined, 5, 15 Volt Undefined Volt Undefined Volt
Output Range2.5V to 73V 15V, 5V, 3.3V, 1.23V to 57V 2.5V to 75V 2.5V to 70V
Switching Frequency800 kHz 150 kHz 600 kHz 1000 kHz
Feedback Voltage2.5 Volt 2.5 Volt 2.5 Volt
Regulator FamilyUndefined SIMPLE SWITCHER Undefined Undefined
AutomotiveYes Undefined
Synchronous RectificationNo No No No

Datasheet
TitleSizeDateOther
Language
LM5007 High Voltage (80V) Step Down Switching Regulator281
Kbytes		5-Feb-08 


Featured Application Notes
TitleSizeDateOther
Language
AN-1298: Application Note 1298 LM5007 Evaluation Board313
Kbytes		29-Jan-04 
AN-1319: Application Note 1319 Analysis and Design of a Hysteretic Constant Frequency Buck Regulator Using the LM5007426
Kbytes		25-May-04 中文
AN-1634: Application Note 1634 Starting Up A Buck Regulator With a Voltage Present At V OUT71
Kbytes		17-May-07日本語
中文


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Kbytes		4-Mar-09 
AN-1481: Application Note 1481 Controlling Output Ripple and Achieving ESR Independence in Constant On-Time (COT) Regulator Designs574
Kbytes		27-Sep-06日本語
中文
AN-1445: Application Note 1445 LM5009 Evaluation Board479
Kbytes		23-Jul-08 
AN-1588: Application Note 1588 LM5001 Evaluation Board658
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AN-1748: Application Note 1748 LM5005 Evaluation Board159
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AN-1574: Application Note 1574 LM5073 Evaluation Board464
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AN-1330: Application Note 1330 LM5008 Evaluation Board334
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Part Number(s)
(NSID)		Top ViewAvailabilityCurrent Reported StockBudgetary PricingStandard Pack Size
LM5007MM/NOPB
LM5007MM

RoHS



MINI SOIC		Full production
Lead Time: 6 weeks

Samples
DistributorRegionQty
ARROWWorldwide914
DIGIKEYWorldwide3323
FARNELLEurope and Asia4255
FUTUREWorldwide1100
RS COMPONENTSWorldwide305
$1.81 each at 1K+ pcsreel
of
1000
LM5007MMX/NOPB
LM5007MMX

RoHS



MINI SOIC		Full production
Lead Time: 8 weeks

 
DistributorRegionQty
DIGIKEYWorldwide0
FUTUREWorldwide1100
$1.81 each at 1K+ pcsreel
of
3500
LM5007SD/NOPB
LM5007SD

RoHS



LLP		Full production
Lead Time: 12 weeks

Samples
DistributorRegionQty
AVNET-EMWorldwide1000
DIGIKEYWorldwide3849
FUTUREWorldwide1100
NEWARKAmericas413
$1.81 each at 1K+ pcsreel
of
1000
LM5007SDX/NOPB

RoHS



LLP		Full production
Lead Time: 6 weeks

 
DistributorRegionQty
DIGIKEYWorldwide0
$1.81 each at 1K+ pcsreel
of
4500

Obsolete Versions
Obsolete PartAlternate Part or SupplierSourceLast Time Buy Date
LM5007MMEP
NONE
NATIONAL SEMICONDUCTOR
16 Nov 2008

Part Number(s)
(NSID)		DescriptionAvailabilityCurrent Reported StockBudgetary PricingStandard Pack Size
LM5007SD-EVAL
High Voltage (80V) Step Down Switching RegulatorFull production


 
DistributorRegionQty
DIGIKEYWorldwide0
NATIONALWorldwide12
$33.80 each1

LM5007 High Voltage (80 V) Step Down Switching Regulator

Features:

  • Integrated 80 V, 0.7 A 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

Applications:

  • Non-Isolated Buck Regulator
  • Secondary High Voltage Post Regulator
  • +42 V Automotive Systems

Contents:

  • A fully assembled LM5007SD evaluation board
  • LM5007 datasheet
  • LM5007 evaluation board appnote

Part Number(s)
(NSID)		DescriptionAvailabilityCurrent Reported StockBudgetary PricingStandard Pack Size
LM5007EVAL
High Voltage (80V) Step Down Switching Regulator Evaluation BoardFull production


 
DistributorRegionQty
DIGIKEYWorldwide11
FARNELLEurope and Asia17
FUTUREWorldwide2
NATIONALWorldwide18
RS COMPONENTSWorldwide2
$30.00 each1

LM5007 High Voltage (80 V) Step Down Switching Regulator

Features:

  • Integrated 80 V, 0.7 A 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

Applications:

  • Non-Isolated Buck Regulator
  • Secondary High Voltage Post Regulator
  • +42 V Automotive Systems

Contents:

  • A fully assembled LM5007 evaluation board
  • LM5007 appnote (Included in datasheet)
  • LM5007 datasheet

Part Number(s)
(NSID)		Top ViewTypePinsMSL RatingPeak ReflowRoHSCAD SymbolsModelsPackage
Marking
Format
LM5007MM/NOPB
LM5007MM
MINI SOIC81
1		260
260		RoHSDownloadN/A
ZXTT
S81B
LM5007MMX/NOPB
LM5007MMX
MINI SOIC81
1		260
260		RoHSDownloadN/A
ZXTT
S81B
LM5007SD/NOPB
LM5007SD
LLP81
1		260
260		RoHSDownloadN/A
NS
UZXYTT
L00031B
LM5007SDX/NOPB
LLP81260RoHSDownloadN/A
NS
UZXYTT
L00031B

Reliability Metrics
Part Number Process EFR Reject EFR Sample Size PPM LTA Rejects LTA Device Hours FITS MTTF (Hours)
LM5007MMABCD150XV1038680025950002736338335
LM5007MMXABCD150XV1038680025950002736338335
LM5007SDABCD150XV1038680025950002736338335
LM5007SDXABCD150XV1038680025950002736338335

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 PartAlternate Part or SupplierSourceLast Time Buy Date
LM5007MMEP
NONE
NATIONAL SEMICONDUCTOR
16 Nov 2008

MotionFire Development Platform on PowerWise Design TV
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MotionFire Development Platform on PowerWise Design TV
Date: 3/25/2009
Length: 0:30:00

[Information as of 20-Nov-2009]