LM2747
Absolute Maximum Ratings
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
V
CC
BOOT Voltage
I
SEN
FREQ/SYNC Voltage
All other pins
Junction Temperature
Storage Temperature
-0.3 to 7V
-0.3 to 18V
-0.3 to 14V
-0.5 to V
CC
+ 0.3V
-0.3 to V
CC
+ 0.3V
150˚C
−65˚C to 150˚C
Soldering Information
Lead Temperature (soldering, 10sec)
Infrared or Convection (20sec)
ESD Rating (Note 3)
260˚C
235˚C
2kV
Operating Ratings
Supply Voltage Range, V
CC
BOOT Voltage Range
Junction Temperature Range (T
J
)
Thermal Resistance (θ
JA
)
3V to 6V
1V to 17V
−40˚C to +125˚C
155˚C/W
Electrical Characteristics
V
CC
= 3.3V unless otherwise indicated. Typicals and limits appearing in plain type apply for T
A
= T
J
= 25˚C. Limits appearing in
boldface type apply over full Operating Temperature Range. Datasheet min/max specification limits are guaranteed by design,
test, or statistical analysis.
Symbol
V
FB
V
ON
Parameter
FB Pin Voltage
UVLO Thresholds
V
CC
Rising
V
CC
Falling
V
CC
= 3.3V, V
SD
= 3.3V
f
SW
= 600 kHz
V
CC
= 5V, V
SD
= 3.3V
f
SW
= 600 kHz
V
CC
= 3.3V, V
SD
= 0V
V
FB
Rising
V
FB
Falling
V
SS
= 0V
V
SS
= 2.0V
7
1.1
1.3
Conditions
V
CC
= 3V to 6V
Min
0.594
Typ
0.6
2.79
2.42
1.7
2
1
10
10
10
90
25
Sourcing
40
20
55
14
2.3
mA
2.6
3
µA
µs
µs
µA
µA
µA
nA
Max
0.606
Units
V
V
I
Q_VCC
Operating V
CC
Current
Shutdown V
CC
Current
t
PWGD1
t
PWGD2
I
SS-ON
I
SS-OC
PWGD Pin Response Time
PWGD Pin Response Time
SS Pin Source Current
SS Pin Sink Current During Over
Current
I
SEN
Pin Source Current Trip
Point
FB Pin Current
Error Amplifier Unity Gain
Bandwidth
Error Amplifier DC Gain
Error Amplifier Slew Rate
EAO Pin Current Sourcing and
Sinking Capability
Error Amplifier Output Voltage
I
SEN-TH
I
FB
GBW
G
SR
I
EAO
V
EAO
ERROR AMPLIFIER
9
118
2
14
16
Minimum
Maximum
1
2.2
MHz
dB
V/µs
mA
V
V
3
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