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LM5005MHX Datasheet(PDF) 1 Page - National Semiconductor (TI) |
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LM5005MHX Datasheet(HTML) 1 Page - National Semiconductor (TI) |
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1 / 21 page  LM5005 High Voltage 2.5 Amp Buck Regulator General Description The LM5005 high voltage switching regulator features all of the functions necessary to implement an efficient high volt- age buck regulator using a minimum of external compo- nents. 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 appli- cations. The operating frequency is programmable from 50kHz to 500kHz. An oscillator synchronization pin allows multiple LM5005 regulators to self-synchronize or to be syn- chronized to an external clock. Additional protection features include: current limit, thermal shutdown and remote shut- down capability. The device is available in a power enhanced TSSOP-20 package featuring an exposed die attach pad to aid thermal dissipation. Features n Integrated 75V, 2.5A N-Channel Buck Switch n Ultra-wide input voltage range from 7V to 75V n Internal high voltage bias regulator n Adjustable output voltage from 1.225V n 1.5% feedback reference accuracy n Current mode control with emulated inductor current ramp n Single resistor oscillator frequency setting n Oscillator synchronization input n Programmable soft-start n Shutdown / Standby input n Wide bandwidth error amplifier n Thermal Shutdown Package n TSSOP-20EP (Exposed Pad) Simplified Application Schematic 20161901 September 2005 © 2005 National Semiconductor Corporation DS201619 www.national.com |
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