Absolute Maximum Ratings (Note 1)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Soldering Information
Lead Temperature (soldering, 10sec)
Infrared or Convection (20sec)
ESD Rating (Note 3)
260˚C
235˚C
2kV
VCC
-0.3 to 7V
-0.3 to 18V
BOOT Voltage
ISEN
Operating Ratings
-0.3 to 14V
Supply Voltage Range, VCC (Note 2)
3V to 6V
1V to 17V
FREQ/SYNC Voltage
All other pins
Junction Temperature
Storage Temperature
-0.5 to VCC + 0.3V
-0.3 to VCC + 0.3V
150˚C
BOOT Voltage Range
Junction Temperature Range (TJ)
−40˚C to +125˚C
155˚C/W
Thermal Resistance (θJA
)
−65˚C to 150˚C
Electrical Characteristics
VCC = 3.3V unless otherwise indicated. Typicals and limits appearing in plain type apply for TA= TJ= 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
VFB
Parameter
FB Pin Voltage
Conditions
VCC = 3V to 6V
Min
Typ
0.6
Max
Units
0.594
0.606
V
VON
UVLO Thresholds
VCC Rising
2.79
2.42
V
VCC Falling
VCC = 3.3V, VSD = 3.3V
fSW = 600 kHz
VCC = 5V, VSD = 3.3V
fSW = 600 kHz
VCC = 3.3V, VSD = 0V
VFB Rising
1.1
1.3
1.7
2
2.3
Operating VCC Current
mA
IQ_VCC
2.6
3
Shutdown VCC Current
PWGD Pin Response Time
PWGD Pin Response Time
SS Pin Source Current
1
µA
µs
µs
µA
tPWGD1
tPWGD2
ISS-ON
ISS-OC
10
10
10
VFB Falling
VSS = 0V
7
14
55
SS Pin Sink Current During Over VSS = 2.0V
90
µA
Current
ISEN Pin Source Current Trip
Point
ISEN-TH
25
40
20
µA
nA
IFB
FB Pin Current
Sourcing
ERROR AMPLIFIER
GBW
Error Amplifier Unity Gain
9
MHz
Bandwidth
G
Error Amplifier DC Gain
Error Amplifier Slew Rate
EAO Pin Current Sourcing and
Sinking Capability
118
2
dB
SR
V/µs
IEAO
14
16
1
mA
VEAO
Error Amplifier Output Voltage
Minimum
Maximum
V
V
2.2
3
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