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