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发表于 2018-1-20 12:44:34
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LM5575
75V, 1.5A Step-Down Switching Regulator
General Description
The LM5575 is an easy to use SIMPLE SWITCHER® buck
regulator which allows design engineers to design and opti-
mize a robust power supply using a minimum set of compo-
nents. Operating with an input voltage range of 6 - 75V, the
LM5575 delivers 1.5A of continuous output current with an
integrated 330mΩ N-Channel MOSFET. The regulator uti-
lizes an Emulated Current Mode architecture which provides
inherent line regulation, tight load transient response, and
ease of loop compensation without the usual limitation of low-
duty cycles associated with current mode regulators. The
operating frequency is adjustable from 50kHz to 500kHz to
allow optimization of size and efficiency. To reduce EMI, a
frequency synchronization pin allows multiple IC’s from the
LM(2)557x family to self-synchronize or to synchronize to an
external clock. The LM5575 guarantees robustness with cy-
cle-by-cycle current limit, short-circuit protection, thermal
shut-down, and remote shut-down. The device is available in
a power enhanced TSSOP-16 package featuring an exposed
die attach pad for thermal dissipation. The LM5575 is sup-
ported by the full suite of WEBENCH® On-Line design tools.
Features
■ Integrated 75V, 330mΩ N-channel MOSFET
■ Ultra-wide input voltage range from 6V to 75V
■ Adjustable output voltage as low as 1.225V
■ 1.5% feedback reference accuracy
■ Operating frequency adjustable between 50kHz an
500kHz with single resistor
■ Master or slave frequency synchronization
■ Adjustable soft-start
■ Emulated current mode control architecture
■ Wide bandwidth error amplifier
■ Built-in protection
Package
■ TSSOP-16EP (Exposed Pad) |
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