LM5005 Datasheet | National Semiconductor

LM5005 High Voltage 2.5 Amp Buck Regulator March 2006 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 voltage buck regulator using a minimum of external ponents. 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 pensation. 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 50k Hz to 500k Hz. An oscillator synchronization pin allows multiple LM5005 regulators to selfsynchronize 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 - - - - - - - - - - - - Integrated 75V, 2.5A N-Channel Buck Switch Ultra-wide input voltage range from 7V to 75V Internal high voltage 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 - TSSOP-20EP (Exposed Pad) Simplified Application Schematic © 2007 National Semiconductor Corporation .national. Connection Diagram Top View 20-Lead TSSOP Ordering Information Order Number LM5005MH LM5005MHX Package Type Exposed...