LM5001 Datasheet, PDF (1/18 Pages) National Semiconductor (TI) – High Voltage Switch Mode Regulator

August 2007
LM5001
High Voltage Switch Mode Regulator
General Description
The LM5001 high voltage switch mode regulator features all
of the functions necessary to implement efficient high voltage
Boost, Flyback, SEPIC and Forward converters, using few
external components. This easy to use regulator integrates a
75 Volt N-Channel MOSFET with a 1 Amp peak current limit.
Current mode control provides inherently simple loop com-
pensation and line-voltage feed-forward for superior rejection
of input transients. The switching frequency is set with a single
resistor and is programmable up to 1.5MHz. The oscillator
can also be synchronized to an external clock. Additional pro-
tection features include: current limit, thermal shutdown, un-
der-voltage lockout and remote shutdown capability. The
device is available in both SO-8 and LLP-8 packages.
Features
■ ^{Integrated 75 volt N-Channel MOSFET}
■ ^{Ultra-wide input voltage range from 3.1V to 75V}
■ ^{Integrated high voltage bias regulator}
■ ^{Adjustable output voltage}
■ ^{1.5% output voltage accuracy}
■ ^{Current mode control with selectable compensation}
■ ^{Wide bandwidth error amplifier}
■ ^{Integrated current sensing and limiting}
■ ^{Integrated slope compensation}
■ ^{85% maximum duty cycle limit}
■ ^{Single resistor oscillator programming}
■ ^{Oscillator synchronization capability}
■ ^{Enable / Undervoltage Lockout (UVLO) pin}
■ ^{Thermal shutdown}
Packages
■ ^SO-8
■ ^{LLP-8 (4mm x 4mm)}
Typical Application Circuit
Boost Regulator Application Schematic
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