LM2574HVMX-3.3 National Semiconductor, LM2574HVMX-3.3 Datasheet - Page 22

• Manufacturer Part Number: LM2574HVMX-3.3
• Description: Conv DC-DC Single Inv/Step Down 4V to 60V 14-Pin SOIC W T/R
• Manufacturer: National Semiconductor
• Type: Inverting|Step Downr

Specifications of LM2574HVMX-3.3

• Package: 14SOIC W
• Number Of Outputs: 1
• Minimum Input Voltage: 4 V
• Maximum Input Voltage: 60 V
• Switching Frequency: 58 KHz
• Operating Supply Voltage: 60(Max) V
• Maximum Output Current: 0.5 A
• Output Type: Fixed
• Output Voltage: 3.3 V
• Switching Regulator: Yes
• Efficiency: 72(Typ) %
• Operating Temperature: -40 to 125 °C

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Definition of Terms
INDUCTOR SATURATION
The condition which exists when an inductor cannot hold any
more magnetic flux. When an inductor saturates, the induc-
tor appears less inductive and the resistive component domi-
nates. Inductor current is then limited only by the DC resis-
tance of the wire and the available source current.
(Continued)
22
OPERATING VOLT MICROSECOND CONSTANT (E • T
The product (in VoIt • µs) of the voltage applied to the inductor
and the time the voltage is applied. This E • T
measure of the energy handling capability of an inductor and
is dependent upon the type of core, the core area, the num-
ber of turns, and the duty cycle.
op
constant is a
op
)