LM25010   
42V, 1.0A Step-Down Switching Regulator 		Click link to Download

Features
•Wide 6V to 42V Input Voltage Range
•Valley Current Limiting At 1.25A
•Programmable Switching Frequency Up To 1 MHz
•Integrated N-Channel Buck Switch
•Integrated High Voltage Bias Regulator
•No Loop Compensation Required
•Ultra-Fast Transient Response
•Nearly Constant Operating Frequency With Line and Load Variations
•Adjustable Output Voltage
•2.5V, ±2% Feedback Reference
•Programmable Soft-Start
•Thermal shutdown
•LM25010Q is AEC-Q100 Grade 1 & 0 qualified

Description

The LM25010 features all the functions needed to implement a low cost, efficient, buck regulator capable of supplying in excess of 1A load current. This high voltage regulator integrates an N-Channel Buck Switch, and is available in thermally enhanced LLP-10 and TSSOP-14EP packages. The constant on-time regulation scheme requires no loop compensation resulting in fast load transient response and simplified circuit implementation. The operating frequency remains constant with line and load variations due to the inverse relationship between the input voltage and the on-time. The valley current limit detection is set at 1.25A. Additional features include: VCC under-voltage lock-out, thermal shutdown, gate drive under-voltage lock-out, and maximum duty cycle limiter.

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LM25010
 
6.00 <=		 V in Lower
 V		  
<=		 V in Upper
 V		  
<= 42.00
V out 2.50 <=  V <= 42.00
I out    A <= 1.00
Ambient Temperature  °C <= 100


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Also Recommended
LM25005▲2.5A 42V Switching Regulator
LM25007▲0.5A 42V Switching Regulator
LM5010▲Higher Voltage Range (80V) Version



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                                              LM25010
Drag-Select for Table Reset Graph
Also Recommended
LM25005▲2.5A 42V Switching Regulator
LM25007▲0.5A 42V Switching Regulator
LM5010▲Higher Voltage Range (80V) Version

Typical Application
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Block Diagram
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Typical Performance
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Paramaters / ValuesLM25010 LM25005 LM25007 LM5010
Output Current1000 mA 2500 mA 500 mA 1000 mA
Input Min Voltage6 Volt 7 Volt 9 Volt 8 Volt
Input Max Voltage42 Volt 42 Volt 42 Volt 75 Volt
Output Min2.5 Volt 1.23 Volt 2.5 Volt 2.5 Volt
Output Max37 Volt 37 Volt 37 Volt 70 Volt
Frequency Min50 kHz 50 kHz 50 kHz 50 kHz
Frequency Max1000 kHz 500 kHz 800 kHz 1000 kHz
Efficiency (peak)95 % 94 % 93 % 91 %
On/Off PinYes Yes Yes Yes
Error FlagNo No No No
SoftStartYes Yes No Yes
Sync PinNo Yes 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 Yes Yes
Adj Switch FrequencyYes Yes Yes Yes
PWM ModeConstant on-time Current Constant on-time Constant on-time
TopologyBuck Buck, Inverting Buck Buck
Special FeaturesUltra-fast transient response 1.5% feedback voltage accuracy, emulated current mode Internal startup regulator for Vin>9V, internal 42V/07A 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
Output VoltageUndefined Volt Undefined Volt Undefined Volt
Output Range2.5V to 37V 1.23V to 37V 2.5V to 37V 2.5V to 70V
Switching Frequency1000 kHz 500 kHz 800 kHz 1000 kHz
Feedback Voltage2.5 Volt 1.225 Volt 2.5 Volt 2.5 Volt
Regulator FamilyUndefined Undefined Undefined
AEC Q-100 Automotive Grade1
AutomotiveYes Yes Yes Undefined
Synchronous RectificationNo No No No

Datasheet
TitleSizeDateOther
Language
LM25010/LM25010Q 42V, 1.0A Step-Down Switching Regulator405
Kbytes		2-Dec-08日本語


Featured Application Notes
TitleSizeDateOther
Language
AN-1431: Application Note 1431 LM25010 Evaluation Board632
Kbytes		19-Dec-05 


More Application Notes
TitleSizeDateOther
Language
AN-1311: Application Note 1311 MPL PHY Layer Overview151
Kbytes		19-Jan-04 中文
AN-1965: Application Note 1965 LM25011 Evaluation Board378
Kbytes		30-May-09 

Part Number(s)
(NSID)		Top ViewAvailabilityCurrent Reported StockBudgetary PricingStandard Pack Size
LM25010Q0MH/NOPB

RoHS



TSSOP EXP PAD		Full production
Lead Time: 8 weeks

Samples
DistributorRegionQty
DIGIKEYWorldwide183
$2.25 each at 1K+ pcsrail
of
94
LM25010Q1MH/NOPB

RoHS



TSSOP EXP PAD		Full production
Lead Time: 6 weeks

Samples
DistributorRegionQty
DIGIKEYWorldwide183
$1.85 each at 1K+ pcsrail
of
94
LM25010MH/NOPB
LM25010MH

RoHS



TSSOP EXP PAD		Full production
Lead Time: 8 weeks

Samples
DistributorRegionQty
ARROWWorldwide207
AVNET-EMWorldwide262
DIGIKEYWorldwide151
FARNELLEurope and Asia690
FUTUREWorldwide292
NEWARKAmericas225
$1.40 each at 1K+ pcsrail
of
94
LM25010Q0MHX/NOPB

RoHS



TSSOP EXP PAD		Full production
Lead Time: 8 weeks

 
DistributorRegionQty
DIGIKEYWorldwide0
$2.25 each at 1K+ pcsreel
of
2500
LM25010Q1MHX/NOPB

RoHS



TSSOP EXP PAD		Full production
Lead Time: 8 weeks

 
DistributorRegionQty
DIGIKEYWorldwide0
$1.85 each at 1K+ pcsreel
of
2500
LM25010MHX/NOPB

RoHS



TSSOP EXP PAD		Full production
Lead Time: 12 weeks

 
DistributorRegionQty
ARROWWorldwide2500
DIGIKEYWorldwide0
$1.40 each at 1K+ pcsreel
of
2500
LM25010SD/NOPB

RoHS



LLP		Full production
Lead Time: 8 weeks

Samples
DistributorRegionQty
ARROWWorldwide4000
AVNET-EMWorldwide2000
DIGIKEYWorldwide1707
FARNELLEurope and Asia762
FUTUREWorldwide928
NEWARKAmericas1000
$1.40 each at 1K+ pcsreel
of
1000

Part Number(s)
(NSID)		DescriptionAvailabilityCurrent Reported StockBudgetary PricingStandard Pack Size
LM25010EVAL
Evaluation Boards for 42V, 1.0A Step-Down Switching RegulatorFull production


 
DistributorRegionQty
DIGIKEYWorldwide0
NATIONALWorldwide146
$54.00 each1

Description:

LM25010 42V, 1.0A Step-Down Switching Regulator

Features:

  • Wide 6V to 42V Input Voltage Range
  • Valley Current Limiting at 1.25A
  • Programmable Switching Frequency Up to 1MHz
  • Integrated High Voltage Bias Regulator
  • No Loop Compensation Required
  • Ultra-Fast Transient Response
  • Nearly Constant Operating Frequency with Line and Load Variations
  • Adjustable Output Voltage
  • 2.5V, ±2% Feedback Reference
  • Programmable Soft-Start
  • Thermal Shutdown

Applications:

  • Non-Isolated Telecommunications Regulator
  • Secondary Side Post Regulator
  • Power Supply for Automotive Electronics

contents:

  • A fully assembled LM25010 evaluation board
  • LM25010 datasheet
  • LM25010 evaluation board appnote

Part Number(s)
(NSID)		Top ViewTypePinsMSL RatingPeak ReflowRoHSCAD SymbolsModelsPackage
Marking
Format
LM25010Q0MH/NOPB
TSSOP EXP PAD141260RoHSDownloadN/A
NSUZXYTT
L25010
Q0MH
LM25010Q1MH/NOPB
TSSOP EXP PAD141260RoHSDownloadN/A
NSUZXYTT
L25010
Q1MH
LM25010MH/NOPB
LM25010MH
TSSOP EXP PAD141
1		260
260		RoHSDownloadN/A
NSUZXYTT
L25010
MH
LM25010Q0MHX/NOPB
TSSOP EXP PAD141260RoHSDownloadN/A
NSUZXYTT
L25010
Q0MH
LM25010Q1MHX/NOPB
TSSOP EXP PAD141260RoHSDownloadN/A
NSUZXYTT
L25010
Q1MH
LM25010MHX/NOPB
TSSOP EXP PAD141260RoHSDownloadN/A
NSUZXYTT
L25010
MH
LM25010SD/NOPB
LLP101260RoHSDownloadN/A
NS
UZXYTT
25010SD

Design Tools
TitleSizeDate
LM25010 Quick Start Calculator362 Kbytes21-Jul-2009

Reliability Metrics
Part Number Process EFR Reject EFR Sample Size PPM LTA Rejects LTA Device Hours FITS MTTF (Hours)
LM25010MHABCD150XV1038680025950002736338335
LM25010MHXABCD150XV1038680025950002736338335
LM25010Q0MHABCD150XV1038680025950002736338335
LM25010Q0MHXABCD150XV1038680025950002736338335
LM25010Q1MHABCD150XV1038680025950002736338335
LM25010Q1MHXABCD150XV1038680025950002736338335
LM25010SDABCD150XV1038680025950002736338335

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.


[Information as of 21-Nov-2009]