Features • Integrated N-Channel MOSFET • Guaranteed 150 mA output current capability • Ultra-Fast Transient Response • No loop compensation required • Vin feed forward provides constant operating frequency • Switching frequency can exceed 600 kHz • Highly efficient operation • 2% accurate 2.5V feedback from -40°C to 125°C • Internal startup regulator • Intelligent current limit protection • External shutdown control • Thermal shutdown • MSOP-8 and thermally enhanced LLP packages Description The LM5009 Step Down Switching Regulator features all of the functions needed to implement a low cost, efficient, Buck bias regulator. This device is capable of driving a 150 mA load current from a 9.5V to 95V input source. The switching frequency can exceed 600 kHz, depending on the input and output voltages. The output voltage may be set from 2.5V to 85V. This high voltage regulator contains an N-Channel buck switch and internal startup regulator. The device is easy to implement and is provided in the MSOP-8 and the thermally enhanced LLP-8 packages. The LM5009 is a well suited alternative to a high voltage monolithic or discrete linear solution where the power loss becomes unacceptable. The regulator’s operation 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 over load and input voltage variations. The hysteretic control requires no loop compensation, resulting in an ultra-fast transient response. An intelligent current limit is implemented with forced OFF time, which is inversely proportional to Vout. This scheme ensures short circuit protection while providing minimum foldback. Other features include: Thermal Shutdown, Vcc under-voltage lockout, Gate drive under-voltage lockout, and Maximum Duty Cycle limiter.

LM5009   9.50 <= V in Lower  V   <= V in Upper  V   <= 95.00 V out 2.50 <=  V <= 75.00 I out    A <= 0.15 Ambient Temperature  °C <= 100 What are WEBENCH® tools? Also Recommended LM25007▲ 42V, 0.5A Step-Down Switching Regulator LM5007▲ 500mA High Voltage (80V) Step-Down Switching Regulator LM5008▲ 350mA High Voltage (100V) Step-Down Switching Regulator LM5009A▲ A Version: Minimum Input Voltage Decreased From 9.5V To 6V 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
	LM5009 150 mA, 100V Step-Down Switching Regulator	334 Kbytes	5-Feb-08

Featured Application Notes

Title		Size	Date	Other Language
	AN-1445: Application Note 1445 LM5009 Evaluation Board	479 Kbytes	23-Jul-08
	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-1820: Application Note 1820 LM5032 Interleaved Boost Converter	1942 Kbytes	30-May-08
	AN-1962: Application Note 1962 LM5032 Interleaved Boost Evaluation Board	2506 Kbytes	27-Aug-09

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	AN-1937: Application Note 1937 LM3433 10A to 40A LED Driver Evaluation Board	1559 Kbytes	25-Mar-09
	AN-1875: Application Note 1875 LM5073HE Evaluation Board With Active Bridge	230 Kbytes	2-Jul-08
	AN-1319: Application Note 1319 Analysis and Design of a Hysteretic Constant Frequency Buck Regulator Using the LM5007	426 Kbytes	25-May-04	中文
	AN-1956: Application Note 1956 LM5001 Boost Evaluation Board	838 Kbytes	4-Mar-09
	AN-1588: Application Note 1588 LM5001 Evaluation Board	658 Kbytes	18-Mar-07
	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-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
	AN-1736: Application Note 1736 LM3433 HB LED Driver Evaluation Kit	1011 Kbytes	4-Feb-08
	AN-1793: Application Note 1793 LM3433 4A to 20A LED Driver Evaluation Board	701 Kbytes	25-Aug-08	中文

Design Tools

Title	Size	Date
LM5009 Quick Start Calculator	357 Kbytes	10-Jul-2009

Reliability Metrics

Part Number	Process	EFR Reject	EFR Sample Size	PPM	LTA Rejects	LTA Device Hours	FITS	MTTF (Hours)
LM5009MM	ABCD150XV2	0	3601	0	0	1155496	4	327875145
LM5009MMX	ABCD150XV2	0	3601	0	0	1155496	4	327875145
LM5009SDC	ABCD150XV2	0	3601	0	0	1155496	4	327875145
LM5009SDCX	ABCD150XV2	0	3601	0	0	1155496	4	327875145

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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