LM2574MX-12 National Semiconductor, LM2574MX-12 Datasheet - Page 22
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LM2574MX-12
Manufacturer Part Number
LM2574MX-12
Description
Conv DC-DC Single Inv/Step Down 4V to 40V 14-Pin SOIC W T/R
Manufacturer
National Semiconductor
Type
Inverting|Step Downr
Datasheet
1.LM2574MX-ADJNOPB.pdf
(24 pages)
Specifications of LM2574MX-12
Package
14SOIC W
Number Of Outputs
1
Minimum Input Voltage
4 V
Maximum Input Voltage
40 V
Switching Frequency
58 KHz
Operating Supply Voltage
40(Max) V
Maximum Output Current
0.5 A
Output Type
Fixed
Output Voltage
12 V
Switching Regulator
Yes
Efficiency
88(Typ) %
Operating Temperature
-40 to 125 °C
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
LM2574MX-12/NOPB
Manufacturer:
NS
Quantity:
16 394
www.national.com
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
)