资料介绍
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 components. 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 applications. The operating frequency
is programmable from 50kHz to 500kHz. 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.
the functions necessary to implement an efficient high voltage
buck regulator using a minimum of external components. 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 applications. The operating frequency
is programmable from 50kHz to 500kHz. 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.
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