LM2574HVM-5.0/NOPB National Semiconductor, LM2574HVM-5.0/NOPB Datasheet - Page 6
![IC REG SIMPLE SWITCHER 14-SOIC](/photos/6/60/66091/pkg_m14b_sml.jpg)
LM2574HVM-5.0/NOPB
Manufacturer Part Number
LM2574HVM-5.0/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 LM2574HVM-5.0/NOPB
Internal Switch(s)
Yes
Synchronous Rectifier
No
Number Of Outputs
1
Voltage - Output
5V
Current - Output
500mA
Frequency - Switching
52kHz
Voltage - Input
4 ~ 60 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
5V
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
*LM2574HVM-5.0
*LM2574HVM-5.0/NOPB
LM2574HVM-5.0
*LM2574HVM-5.0/NOPB
LM2574HVM-5.0
www.national.com
ON /OFF CONTROL Test Circuit Figure 2
V
V
I
I
Symbol
H
IL
Specifications with standard type face are for T
ture Range. Unless otherwise specified, V
and V
All Output Voltage Versions
Electrical Characteristics
IH
IL
Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is in-
tended to be functional, but do not guarantee specific performance limits. For guaranteed specifications and test conditions, see the Electrical Characteristics.
Note 2: All limits guaranteed at room temperature (Standard type face) and at temperature extremes (bold type face). All room temperature limits are 100% produc-
tion tested. All limits at temperature extremes are guaranteed via correlation using standard Statistical Quality Control (SQC) methods. All limits are used to calculate
Average Outgoing Quality Level.
Note 3: External components such as the catch diode, inductor, input and output capacitors can affect switching regulator system performance. When the LM2574
is used as shown in the Figure 2 test circuit, system performance will be as shown in system parameters section of Electrical Characteristics.
Note 4: Output pin sourcing current. No diode, inductor or capacitor connected to output pin.
Note 5: Feedback pin removed from output and connected to 0V.
Note 6: Feedback pin removed from output and connected to +12V for the Adjustable, 3.3V, and 5V versions, and +25V for the 12V and 15V versions, to force the
output transistor OFF.
Note 7: V
Note 8: Junction to ambient thermal resistance with approximately 1 square inch of printed circuit board copper surrounding the leads. Additional copper area will
lower thermal resistance further. See application hints in this data sheet and the thermal model in Switchers Made Simple software.
Note 9: Junction to ambient thermal resistance with approximately 4 square inches of 1 oz. (0.0014 in. thick) printed circuit board copper surrounding the leads. Ad-
ditional copper area will lower thermal resistance further. (See Note 8.)
Note 10: The oscillator frequency reduces to approximately 18 kHz in the event of an output short or an overload which causes the regulated output voltage to drop
approximately 40% from the nominal output voltage. This self protection feature lowers the average power dissipation of the IC by lowering the minimum duty cycle
from 5% down to approximately 2%.
Typical Performance Characteristics
Normalized Output Voltage
IN
IN
= 30V for the 15V version. I
= 40V (60V for high voltage version).
ON /OFF Pin Logic
Input Level
ON /OFF Pin Input
Current
Parameter
DS011394-27
V
V
ON /OFF Pin = 5V (OFF)
ON /OFF Pin = 0V (ON)
LOAD
OUT
OUT
= 0V
= Nominal Output Voltage
= 100 mA.
IN
(Continued)
Line Regulation
= 12V for the 3.3V, 5V, and Adjustable version, V
J
= 25˚C, and those with boldface type apply over full Operating Tempera-
Conditions
(Circuit of Figure 2 )
6
DS011394-28
Typ
1.4
1.2
12
0
Dropout Voltage
LM2574HV-XX
LM2574-XX
IN
= 25V for the 12V version,
(Note 2)
2.2/2.4
1.0/0.8
Limit
30
10
DS011394-29
µA(Max)
µA(Max)
(Limits)
V(Max)
V(Min)
Units
µA
µA