LM5010 - High Voltage 1A Step Down Switching Regulator
Datasheet Packaging Samples & Pricing Eval. Boards Reliability Design Tools Reference Designs Application Notes Knowledge Base

Features
• Input Voltage Range: 8V to 75V
• Valley Current Limit At 1.25A
• Switching Frequency Can Exceed 1 MHz
• Integrated N-Channel Buck Switch
• Integrated Startup Regulator
• No Loop Compensation Required
• Ultra-Fast Transient Response
• Operating Frequency Remains Constant With Load and Line Variations
• Maximum Duty Cycle Limited During Startup
• Adjustable Output Voltage
•Precision 2.5V Feedback Reference
•Thermal shutdown

General Description

The LM5010 Step Down Switching Regulator features all the functions needed to implement a low cost, efficient, buck bias regulator capable of supplying in excess of 1A load current. More...


Applications

• High Efficiency Point-Of-Load (POL) Regulator
• Non-Isolated Telecommunications Buck Regulator
• Secondary High Voltage Post Regulator
•Automotive Systems
  Typical Application
click for larger image


ParametersValues
Output Current 1000 mA
Input Min Voltage 8 Volt
Input Max Voltage 75 Volt
Output Min 2.5 Volt
Output Max 70 Volt
Frequency Min 50 kHz
Frequency Max 1000 kHz
Efficiency (peak) 91 %
On/Off Pin Yes
Error Flag No
SoftStart Yes
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 No compensation required, ultra-fast transient response
Step-Down Yes
Multiple Output Capability No
Output Power Undefined Watt
Output Voltage Undefined Volt
Output Range 2.5V to 70V
Switching Frequency 1000 kHz
Feedback Voltage 2.5 Volt
Regulator Family Undefined
Automotive Undefined
Synchronous Rectification No


Typical Performance

*click for larger image


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LM5010
 
8.00 <=		 V in Lower
 V		  
<=		 V in Upper
 V		  
<= 75.00
V out 2.50 <=  V <= 75.00
I out    A <= 1.00
Ambient Temperature  °C <= 100


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Also Recommended
LM5005▲Higher Current (2.5A) High Voltage (80V) Switching Reg With Softstart
LM5007▲80V 0.5A Step Down Switching Regulator
LM5008▲100V 0.35A Step Down Switching Regulator
LM5010A▲Higher Max Temperature 150 Deg C And Lower Input Voltage 6V
LM511580V Sync Buck Controller (Iout 2A Up To 20A)
Additional Resources
Online Seminars Design Tools

Application Notes


Block Diagram

*click for larger image



Datasheet
RoHS Compliance Information Size in KbytesDate Click link below to Download
LM5010 High Voltage 1A Step Down Switching Regulator 833
Kbytes		 11-Feb-05 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
LM5010 EVALHigh Voltage 1A Step Down Switching RegulatorFull productionN/A
 
Buy Now 		1+$40.601-
8 weeksN/A
LM5010MHTSSOP EXP PAD14NOPB1260RoHS Download Full productionN/A
Samples
Buy Now 		1K+$2.10rail
of
94		NSUZXYTT
L5010
MH
6 weeks1000
LM5010MHXTSSOP EXP PAD14NOPB1260RoHS Download Full productionN/A
 
Buy Now 		1K+$2.10reel
of
2500		NSUZXYTT
L5010
MH
6 weeks5000
LM5010SDLLP10NOPB
STD		1
1		260
260		RoHS Download Full productionN/A
Samples
Buy Now 		1K+$2.10reel
of
1000		NS
UZXYTT
L00057B
6 weeks2000
LM5010SDXLLP10NOPB1260RoHS Download Full productionN/A
 
Buy Now 		1K+$2.10reel
of
4500		NS
UZXYTT
L00057B
6 weeks10000

General Description

The LM5010 Step Down Switching Regulator features all the functions needed to implement a low cost, efficient, buck bias regulator capable of supplying in excess of 1A load current. This high voltage regulator contains an N-Channel Buck Switch, and is available in thermally enhanced LLP-10 and TSSOP-14EP packages. The hysteretic regulation scheme requires no loop compensation, results in fast load transient response, and simplifies 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 lockout, thermal shutdown, gate drive under-voltage lockout, and maximum duty cycle limiter.

Reliability Metrics

Part Number Process EFR Reject EFR Sample Size PPM LTA Rejects LTA Device Hours FITS MTTF (Hours)
LM5010MHABCD150XV1038680025950002736338335
LM5010MHXABCD150XV1038680025950002736338335
LM5010SDABCD150XV1038680025950002736338335
LM5010SDXABCD150XV1038680025950002736338335

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.


Design Tools

TitleSize in Kbytes Date Click link below to Download    
LM5010 Quick Start Calculator 364 Kbytes 20-Jul-2009 View    

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Reference Designs
•LM5010 Reference Design - Buck Converter for Automotive Tail Light Application, 1High Brightness LUXEON LED @ 300 or 900 mA

Application Notes

TitleSize in Kbytes Date Click link below to Download
AN-1352: Application Note 1352 LM5010 Evaluation Board 591
Kbytes		 2-Dec-04 Download

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More Application Notes

TitleSize in Kbytes Date Click link below to Download
AN-1423: Application Note 1423 LM5010A Evaluation Board 643
Kbytes		 4-Dec-05 Download
AN-1725: Application Note 1725 LM5015 Non-Isolated Two-Switch DC-DC Regulator Evaluation Board 161
Kbytes		 29-Oct-07 Download
AN-1724: Application Note 1724 LM5015 Isolated Two-Switch DC-DC Regulator Evaluation Board 167
Kbytes		 29-Oct-07 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  

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[Information as of 7-Nov-2009]