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LM25005

National Semiconductor
Part Number LM25005
Manufacturer National Semiconductor
Description STEP-DOWN SWITCHING REGULATOR
Published Aug 28, 2007
Detailed Description www.DataSheet4U.com February 2006 LM25005 42V, 2.5A Step-Down Switching Regulator LM25005 42V, 2.5A Step-Down Switchin...
Datasheet PDF File LM25005 PDF File

LM25005
LM25005

Overview
www.
DataSheet4U.
com February 2006 LM25005 42V, 2.
5A Step-Down Switching Regulator LM25005 42V, 2.
5A Step-Down Switching Regulator General 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.
Features n n n n n n n n n n n n 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 Package n TSSOP-20EP (Exposed Pad) Simplified Application Schematic 20170001 © 2006 National Semiconductor Corporation DS201700 www.
national.
com LM25005 Connection Diagram 20170002 Top View 20-Lead TSSOP Ordering Information Order Number LM25005MH LM25005MH...


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