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 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.

LM5005   7.00 <= V in Lower  V   <= V in Upper  V   <= 75.00 V out 0.00 <=  V <= 30.00 I out    A <= 2.50 Ambient Temperature  °C <= 100 What are WEBENCH® tools? Also Recommended LM25005▲ High Voltage 2.5 A Buck Regulator MY BRIEFCASE                                       Click any "Briefcase" icon to add an item

Typical Application *click for larger image	Block Diagram *click for larger image
Typical Performance *click for larger image

Datasheet

Title		Size	Date	Other Language
	LM5005 High Voltage 2.5 Amp Buck Regulator	417 Kbytes	20-Mar-07	日本語

Featured Application Notes

Title		Size	Date	Other Language
	AN-1748: Application Note 1748 LM5005 Evaluation Board	159 Kbytes	7-Nov-07
	AN-1574: Application Note 1574 LM5073 Evaluation Board	464 Kbytes	24-Apr-07
	AN-1875: Application Note 1875 LM5073HE Evaluation Board With Active Bridge	230 Kbytes	2-Jul-08
	AN-1889: Application Note 1889 How to Measure the Loop Transfer Function of Power Supplies	612 Kbytes	14-Oct-08

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	AN-1962: Application Note 1962 LM5032 Interleaved Boost Evaluation Board	2506 Kbytes	27-Aug-09
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	AN-1481: Application Note 1481 Controlling Output Ripple and Achieving ESR Independence in Constant On-Time (COT) Regulator Designs	574 Kbytes	27-Sep-06	日本語 中文
	AN-1445: Application Note 1445 LM5009 Evaluation Board	479 Kbytes	23-Jul-08
	AN-1588: Application Note 1588 LM5001 Evaluation Board	658 Kbytes	18-Mar-07
	AN-1634: Application Note 1634 Starting Up A Buck Regulator With a Voltage Present At V OUT	71 Kbytes	17-May-07	日本語 中文
	AN-1330: Application Note 1330 LM5008 Evaluation Board	334 Kbytes	7-May-04
	AN-1298: Application Note 1298 LM5007 Evaluation Board	313 Kbytes	29-Jan-04
	AN-1630: Application Note 1630 LM5001 Non-Isolated Flyback Evaluation Board	250 Kbytes	17-Jun-09
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Design Tools

Title	Size	Date
Current Mode Modeling - Reference Guide	1372 Kbytes	1-Aug-2007
Understanding and Applying Current-Mode Control Theory	427 Kbytes	8-Jan-2008

Reliability Metrics

Part Number	Process	EFR Reject	EFR Sample Size	PPM	LTA Rejects	LTA Device Hours	FITS	MTTF (Hours)
LM5005MH	ABCD150XV1	0	3868	0	0	2595000	2	736338335
LM5005MHX	ABCD150XV1	0	3868	0	0	2595000	2	736338335

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.

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