Features • Integrated 42V, 160mΩ N-channel MOSFET • Ultra-wide input voltage range from 7V to 42V • Internal 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 LM25005 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 42V, 160mΩ, N-channel MOSFET, 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 voltage 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 LM25005 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.

LM25005   7.00 <= V in Lower  V   <= V in Upper  V   <= 42.00 V out 1.23 <=  V <= 30.00 I out    A <= 2.50 Ambient Temperature  °C <= 100 What are WEBENCH® tools? Also Recommended LM5005▲ 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
	LM25005 42V, 2.5A Step-Down Switching Regulator	417 Kbytes	20-Mar-07	日本語

Featured Application Notes

Title		Size	Date	Other Language
	AN-1749: Application Note 1749 LM25005 Evaluation Board	158 Kbytes	7-Nov-07
	AN-1889: Application Note 1889 How to Measure the Loop Transfer Function of Power Supplies	612 Kbytes	14-Oct-08

More Application Notes

Title		Size	Date	Other Language
	AN-1311: Application Note 1311 MPL PHY Layer Overview	151 Kbytes	19-Jan-04	中文
	AN-1453: Application Note 1453 LM25007 Evaluation Board	637 Kbytes	15-Mar-06	日本語

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)
LM25005MH	ABCD150XV1	0	3868	0	0	2595000	2	736338335
LM25005MHX	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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