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 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. Applications • High Efficiency Point-Of-Load (POL) Regulator • Non-Isolated Telecommunications Buck Regulator • Secondary High Voltage Post Regulator • Automotive Systems

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 What are WEBENCH® tools? 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 LM5115 80V Sync Buck Controller (Iout 2A Up To 20A) 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
	LM5010 High Voltage 1A Step Down Switching Regulator	833 Kbytes	11-Feb-05

Featured Application Notes

Title		Size	Date	Other Language
	AN-1352: Application Note 1352 LM5010 Evaluation Board	591 Kbytes	2-Dec-04

More Application Notes

Title		Size	Date	Other Language
	AN-1423: Application Note 1423 LM5010A Evaluation Board	643 Kbytes	4-Dec-05
	AN-1725: Application Note 1725 LM5015 Non-Isolated Two-Switch DC-DC Regulator Evaluation Board	161 Kbytes	29-Oct-07
	AN-1724: Application Note 1724 LM5015 Isolated Two-Switch DC-DC Regulator Evaluation Board	167 Kbytes	29-Oct-07
	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

Design Tools

Title	Size	Date
LM5010 Quick Start Calculator	364 Kbytes	20-Jul-2009

Reference Design

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

Reliability Metrics

Part Number	Process	EFR Reject	EFR Sample Size	PPM	LTA Rejects	LTA Device Hours	FITS	MTTF (Hours)
LM5010MH	ABCD150XV1	0	3868	0	0	2595000	2	736338335
LM5010MHX	ABCD150XV1	0	3868	0	0	2595000	2	736338335
LM5010SD	ABCD150XV1	0	3868	0	0	2595000	2	736338335
LM5010SDX	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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