LM5007 - High Voltage (80V) Step Down Switching Regulator

Datasheet Packaging Samples & Pricing Eval. Boards Design Tools Reference Designs Application Notes Knowledge Base

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

General Description


The LM5007 Step Down Switching Regulator features all of the functions needed to implement low cost, efficient, Buck bias regulators. More...


  Typical Application
See Datasheet for Application Information

Parametric Table     expand
Parametric Table    collapse
Output Current 500 mA
Input Min Voltage 9 Volt
Input Max Voltage 75 Volt
Output Min 2.5 Volt
Output Max 73 Volt
Frequency Min 50000 Hz
Frequency Max 800000 Hz
Output Current 500 mA
Input Min Voltage 9 Volt
Input Max Voltage 75 Volt
Output Min 2.5 Volt
Output Max 73 Volt
Frequency Min 50000 Hz
Frequency Max 800000 Hz
Efficiency (peak) 93 %
On/Off Pin Yes
Error Flag No
SoftStart No
Sync Pin No
Inverting Yes
Flyback No
RegType Switching Regulator
Temperature Min -40 deg C
Temperature Max 125 deg C
Adjustable Output Yes
Adj Switch Frequency Yes
PWM Mode Constant on-time
Topology Buck
Special Features Internal startup regulator for Vin>9V, internal 80V/0.7A N-FET, Pull Ron pin to ground for shutdown
Step-Down Yes
Multiple Output Capability No
Output Power Undefined Watt
Output Voltage Undefined Volt
Output Range 2.5V to 73V
Switching Frequency 800000 Hz
Feedback Voltage Undefined Volt
Regulator Family Undefined
Automotive Selection Guide Yes
Synchronous Rectification No
View Using Catalog


Typical Performance


*click for larger image


  WEBENCH Live Simulation!
LM5007 WEBENCH® Custom
Design/Analyze/Build It/Test It
 
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
LM2597HV0.5A 60V Simple Switcher W/ Pgood
LM5008100V 350mA Switching Regulator
LM50101A 80V Switching Regulator
LM2936LM2936 - 60V 50mA Linear Regulator
LM317HV60V 1.5A Linear Regulator
LM5007EPHigher Temperature Enhanced Plastic Version

Additional Resources


Online Seminars Design Tools (see below)

Application Notes (see below)


Block Diagram


*click for larger image



Datasheet
RoHS Compliance Information Size in KbytesDate Click link below to Download
LM5007 High Voltage (80V) Step Down Switching Regulator 281 Kbytes 5-Feb-08 View Online
Download

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Package Availability, Models, Samples & Pricing
Part NumberPackageFactory Lead TimeModelsSamples &
Electronic
Orders
Budgetary PricingStd
Pack
Size
Package
Marking
Format
TypePinsSpec.MSL
Rating
Peak
Reflow
RoHS
Report
CAD
Symbols
WeeksQtyQty$US each
LM5007EVALHigh Voltage (80V) Step Down Switching Regulator Evaluation BoardFull productionN/A
 
Buy Now
1+$30.001-
8 weeksN/A
LM5007SD-EVALHigh Voltage (80V) Step Down Switching RegulatorFull productionN/A
 
Buy Now
1+$33.801-
8 weeksN/A
LM5007MMMINI SOIC8STD
NOPB
1
1
260
260
RoHS Download Full productionN/A
Samples
Buy Now
1K+$1.60reel
of
1000
ZXTT
S81B
8 weeks7500
LM5007MMXMINI SOIC8STD
NOPB
1
1
260
260
RoHS Download Full productionN/A
 
Buy Now
1K+$1.60reel
of
3500
ZXTT
S81B
6 weeks15000
LM5007SDLLP8STD
NOPB
1
1
260
260
RoHS Download Full productionN/A
Samples
Buy Now
1K+$1.60reel
of
1000
NS
UZXYTT
L00031B
6 weeks2000
LM5007SDXLLP8NOPB1260RoHS Download Full productionN/A
 
Buy Now
1K+$1.60reel
of
4500
NS
UZXYTT
L00031B
6 weeks10000

Obsolete Parts

Obsolete PartAlternate Part or SupplierSourceLast Time Buy Date
LM5007MMEP
NONE
NONE
11/16/2008

General 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.

Design Tools


TitleSize in Kbytes Date Click link below to Download    
Controller Monitors ORing FET Current and Voltage     View    
Negative Supply Uses Positive Hysteretic Regulator     View    

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Reference Designs
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

Application Notes


TitleSize in Kbytes Date Click link below to Download
AN-1298: Application Note 1298 LM5007 Evaluation Board 313 Kbytes 29-Jan-04 Download
AN-1319: Application Note 1319 Analysis and Design of a Hysteretic Constant Frequency Buck Regulator Using the LM5007 426 Kbytes 25-May-04 Download
AN-1319 (Chinese): Application Note 1319 Analysis and Design of a Hysteretic Constant Frequency Buck Regulator Using the LM5007
484 Kbytes  
AN-1634: Application Note 1634 Starting Up A Buck Regulator With a Voltage Present At V OUT 71 Kbytes 17-May-07 Download
AN-1634 (Japanese): Application Note 1634 Starting Up A Buck Regulator With a Voltage Present At V OUT
95 Kbytes   Download
AN-1634 (Chinese): Application Note 1634 Starting Up A Buck Regulator With a Voltage Present At V OUT
222 Kbytes  

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More Application Notes


TitleSize in Kbytes Date Click link below to Download
AN-1875: Application Note 1875 LM5073HE Evaluation Board With Active Bridge 230 Kbytes 2-Jul-08 Download
AN-1820: Application Note 1820 LM5032 Interleaved Boost Converter 1942 Kbytes 30-May-08 Download
AN-1481: Application Note 1481 Controlling Output Ripple and Achieving ESR Independence in Constant On-Time (COT) Regulator Designs 574 Kbytes 27-Sep-06 Download
AN-1481 (Japanese): Application Note 1481 Controlling Output Ripple and Achieving ESR Independence in Constant On-Time (COT) Regulator Designs
220 Kbytes   Download
AN-1481 (Chinese): Application Note 1481 Controlling Output Ripple and Achieving ESR Independence in Constant On-Time (COT) Regulator Designs
421 Kbytes  
AN-1445: Application Note 1445 LM5009 Evaluation Board 479 Kbytes 23-Jul-08 Download
AN-1588: Application Note 1588 LM5001 Evaluation Board 658 Kbytes 18-Mar-07 Download
AN-1748: Application Note 1748 LM5005 Evaluation Board 159 Kbytes 7-Nov-07 Download
AN-1574: Application Note 1574 LM5073 Evaluation Board 464 Kbytes 24-Apr-07 Download
AN-1330: Application Note 1330 LM5008 Evaluation Board 334 Kbytes 7-May-04 Download
AN-1630: Application Note 1630 LM5001 Non-Isolated Flyback Evaluation Board 240 Kbytes 10-Dec-07 Download
AN-1736: Application Note 1736 LM3433 HB LED Driver Evaluation Kit 1011 Kbytes 4-Feb-08 Download
AN-1793: Application Note 1793 LM3433 4A to 20A LED Driver Evaluation Board 701 Kbytes 25-Aug-08 Download

If you have trouble printing or viewing PDF file(s), see Printing Problems.

[Information as of 7-Oct-2008]