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Absolute Maximum Ratings (Note 1)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
VIN to GND
43V
EN Pin Voltage
-0.5V to 6V
SW to GND (Note 2)
-5V to V
IN
BOOT Pin Voltage
V
SW + 7V
FB Pin Voltage
-0.5V to 7V
Power Dissipation
Internally Limited
Junction Temperature
150°C
Soldering Information
Infrared (5 sec.)
260°C
ESD Rating (Note 3)
Human Body Model
±2 kV
Storage Temperature Range
-65°C to +150°C
Operating Ratings (Note 1)
Supply Voltage (V
IN)
4.5V to 42V
Junction Temperature Range
-40°C to +125°C
Electrical Characteristics Limits in standard type are for T
J = 25°C only; limits in boldface type apply over the
junction temperature (T
J) range of -40°C to +125°C. Minimum and Maximum limits are guaranteed through test, design, or statistical
correlation. Typical values represent the most likely parametric norm at T
A = TJ = 25°C, and are provided for reference purposes
only. Unless otherwise specified: V
IN = 12V.
Symbol
Parameter
Conditions
Min
(Note 5)
Typ
(Note 4)
Max
(Note 5)
Units
LM22674-5.0
V
FB
Feedback Voltage
V
IN = 8V to 42V
4.925/4.9
5.0
5.075/5.1
V
LM22674-ADJ
V
FB
Feedback Voltage
V
IN = 4.7V to 42V
1.266/1.259
1.285
1.304/1.311
V
All Output Voltage Versions
I
Q
Quiescent Current
V
FB = 5V
3.4
6
mA
I
STDBY
Standby Quiescent Current
EN Pin = 0V
25
40
A
I
CL
Current Limit
0.56/0.62
0.7
0.84/0.9
A
I
L
Output Leakage Current
V
IN = 42V, EN Pin = 0V, VSW = 0V
0.2
2
A
V
SW = -1V
0.1
3
A
R
DS(ON)
Switch On-Resistance
0.2
0.24/0.32
f
O
Oscillator Frequency
400
500
600
kHz
T
OFFMIN
Minimum Off-time
100
200
300
ns
T
ONMIN
Minimum On-time
100
ns
I
BIAS
Feedback Bias Current
V
FB = 1.3V (ADJ Version Only)
230
nA
V
EN
Enable Threshold Voltage
Falling
1.3
1.6
1.9
V
ENHYST
Enable Voltage Threshold
Hysteresis
0.6
V
I
EN
Enable Input Current
EN Input = 0V
6
A
T
SD
Thermal Shutdown
Threshold
150
°C
θ
JA
Thermal Resistance
MR package, Junction to ambient
temperature resistance (Note 6)
60
°C/W
3
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LM22674/LM22674Q
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