LM5022 60V Low Side Controller for Boost and SEPIC
January 2007
LM5022
60V Low Side Controller for Boost and SEPIC
General Description
The LM5022 is a high voltage low-side N-channel MOSFET
controller ideal for use in boost and SEPIC regulators. It con-
tains all of the features needed to implement single ended
primary topologies. Output voltage regulation is based on
current-mode control, which eases the design of loop com-
pensation while providing inherent input voltage feed-forward.
The LM5022 includes a start-up regulator that operates over
a wide input range of 6V to 60V. The PWM controller is de-
signed for high speed capability including an oscillator fre-
quency range up to 2 MHz and total propagation delays less
than 100 ns. Additional features include an error amplifier,
precision reference, line under-voltage lockout, cycle-by-cy-
cle current limit, slope compensation, soft-start, external syn-
chronization capability and thermal shutdown. The LM5022 is
available in the MSOP-10 package.
Features
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Internal 60V Startup Regulator
1A Peak MOSFET Gate Driver
V
IN
Range 6V to 60V
Duty Cycle Limit of 90%
Programmable UVLO with Hysteresis
Cycle-by-Cycle Current Limit
External Synchronizable (AC-coupled)
Single Resistor Oscillator Frequency Set
Slope Compensation
Adjustable Soft-start
MSOP-10 Package
Applications
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Boost Converter
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SEPIC Converter
Typical Application
20212201
漏 2007 National Semiconductor Corporation
202122
www.national.com
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