LM5005 - High Voltage 2.5 Amp Buck Regulator
Datasheet Packaging Samples & Pricing Eval. Boards Reliability Design Tools Application Notes Knowledge Base

Features
Integrated 75V, 2.5A N-Channel Buck Switch
Ultra-wide input voltage range from 7V to 75V
Internal high voltage bias regulator
Adjustable output voltage from 1.225V
1.5% feedback reference accuracy
Current mode control with emulated inductor current ramp
Single resistor oscillator frequency setting
Oscillator synchronization input
Programmable soft-start
Shutdown / Standby input
Wide bandwidth error amplifier
Thermal Shutdown

General Description


The LM5005 high voltage switching regulator features all of the functions necessary to implement an efficient high voltage buck regulator using a minimum of external components. More...


  Typical Application
*click for larger image


ParametersValues
Output Current 2500 mA
Input Min Voltage 7 Volt
Input Max Voltage 75 Volt
Output Min 1.23 Volt
Output Max 70 Volt
Frequency Min 50 kHz
Frequency Max 500 kHz
Efficiency (peak) 94 %
On/Off Pin Yes
Error Flag No
SoftStart Yes
Sync Pin Yes
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 Current
Topology Buck
Special Features 1.5% feedback voltage accuracy, emulated current mode
Step-Down Yes
Multiple Output Capability No
Output Range 1.23V to 70V
Switching Frequency 500 kHz
Feedback Voltage Undefined Volt
Automotive Yes
Synchronous Rectification No


Typical Performance


*click for larger image


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LM5005

 
7.00 <=
V in Lower
 V
 
<=
V in Upper
 V
 
<= 75.00
V out 1.23 <=  V <= 30.00
I out    A <= 2.50
Ambient Temperature  °C <= 100


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Also Recommended
LM25005High Voltage 2.5 A Buck Regulator
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
LM5005 High Voltage 2.5 Amp Buck Regulator 417
Kbytes
20-Mar-07 Download
LM5005 High Voltage 2.5 Amp Buck Regulator (Japanese)
585 Kbytes   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
LM5005EVALHigh Voltage 2.5A Buck Regulator (Evaluation board information in the product IC datasheet)Full productionN/A
 
Buy Now
1+$33.801-
8 weeksN/A
LM5005MHTSSOP EXP PAD20NOPB
STD
1
1
260
260
RoHS Download Full productionN/A
Samples
Buy Now
1K+$2.80rail
of
73
NSUZXYTT
LM5005
MH
6 weeks500
LM5005MHXTSSOP EXP PAD20NOPB
STD
1
1
260
260
RoHS Download Full productionN/A
 
Buy Now
1K+$2.80reel
of
2500
NSUZXYTT
LM5005
MH
6 weeks5000

General Description


The LM5005 high voltage switching regulator features all of the functions necessary to implement an efficient high voltage buck regulator using a minimum of external components. This easy to use regulator includes a 75V N-Channel buck switch with an output current capability of 2.5 Amps. The regulator control method is based upon current mode control utilizing an emulated current ramp. Current mode control provides inherent line feed-forward, cycle-by-cycle current limiting and ease of loop compensation. The use of an emulated control ramp reduces noise sensitivity of the pulse-width modulation circuit, allowing reliable control of very small duty cycles necessary in high input voltage applications. The operating frequency is programmable from 50kHz to 500kHz. An oscillator synchronization pin allows multiple LM5005 regulators to self-synchronize or to be synchronized to an external clock. Additional protection features include: current limit, thermal shutdown and remote shutdown capability. The device is available in a power enhanced TSSOP-20 package featuring an exposed die attach pad to aid thermal dissipation.

Reliability Metrics


Part Number Process EFR Reject EFR Sample Size PPM LTA Rejects LTA Device Hours FITS MTTF (Hours)
LM5005MHABCD150XV1038680025950002736338335
LM5005MHXABCD150XV1038680025950002736338335

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    
Current Mode Modeling - Reference Guide 1372 Kbytes 1-Aug-2007 View Online Download  
Understanding and Applying Current-Mode Control Theory 427 Kbytes 8-Jan-2008 View Online Download  

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Application Notes


TitleSize in Kbytes Date Click link below to 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-1875: Application Note 1875 LM5073HE Evaluation Board With Active Bridge 230
Kbytes
2-Jul-08 Download
AN-1889: Application Note 1889 How to Measure the Loop Transfer Function of Power Supplies 612
Kbytes
14-Oct-08 Download

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AN-1319 (Chinese): Application Note 1319 Analysis and Design of a Hysteretic Constant Frequency Buck Regulator Using the LM5007
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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
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23-Jul-08 Download
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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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25-Aug-08 Download
AN-1793 (Chinese): Application Note 1793 LM3433 4A to 20A LED Driver Evaluation Board
591 Kbytes  

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

[Information as of 7-Nov-2009]