LM2574M-3.3/NOPB National Semiconductor, LM2574M-3.3/NOPB Datasheet - Page 22
![IC REG SIMPLE SWITCHER 14-SOIC](/photos/6/60/66091/pkg_m14b_sml.jpg)
LM2574M-3.3/NOPB
Manufacturer Part Number
LM2574M-3.3/NOPB
Description
IC REG SIMPLE SWITCHER 14-SOIC
Manufacturer
National Semiconductor
Series
SIMPLE SWITCHER®r
Type
Step-Down (Buck)r
Datasheet
1.LM2574MX-ADJNOPB.pdf
(24 pages)
Specifications of LM2574M-3.3/NOPB
Internal Switch(s)
Yes
Synchronous Rectifier
No
Number Of Outputs
1
Voltage - Output
3.3V
Current - Output
500mA
Frequency - Switching
52kHz
Voltage - Input
4 ~ 40 V
Operating Temperature
-40°C ~ 125°C
Mounting Type
Surface Mount
Package / Case
14-SOIC (7.5mm Width)
Power - Output
750mW
Primary Input Voltage
12V
No. Of Outputs
1
Output Voltage
3.3V
Output Current
500mA
No. Of Pins
14
Operating Temperature Range
-40°C To +125°C
Msl
MSL 3 - 168 Hours
Filter Terminals
SMD
Rohs Compliant
Yes
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
*LM2574M-3.3
*LM2574M-3.3/NOPB
LM2574M-3.3
*LM2574M-3.3/NOPB
LM2574M-3.3
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
LM2574M-3.3/NOPB
Manufacturer:
National Semiconductor
Quantity:
1 784
Company:
Part Number:
LM2574M-3.3/NOPB
Manufacturer:
TI/NS
Quantity:
340
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
)