Operating Temperature Range ..........................-40°C to +85°C
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) ................................+300°C
Soldering Temperature (reflow) ......................................+260°C
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(V
CC
=
SHDN
= 3.3V, SET = GND , T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at T
A
= +25°C.)
PARAMETER
V
CC
Operating Voltage Range
V
CC
Minimum Startup Voltage
Undervoltage Lockout
Threshold
V
CC
Supply Current
V
CC
Shutdown Current
Fixed t
ON
Time
Minimum t
OFF
Time
Maximum Duty Factor
FB Regulation Threshold
(Note 2)
FB Undervoltage Fault
Threshold (Note 2)
FB Input Bias Current
EXT Resistance
Soft-Start Ramp Time
Logic Input High
Logic Input Low
Logic Input Leakage Current
V
CC
= +2.5V to +5.5V, SET,
SHDN
V
CC
= +2.5V to +5.5V, SET,
SHDN
SET,
SHDN
= V
CC
or GND
-1
MAX1522/MAX1523
f
EXT
> 100kHz, MAX1524 (Note 1), bootstrap required
V
CC
rising
V
CC
falling
No load, nonbootstrapped
SHDN
= GND
V
FB
=1.2V
V
FB
> 0.675V
V
FB
< 0.525V
SET = GND
SET = V
CC
V
CC
= +2.5V to +5.5V
FB falling
V
FB
= 1.3V
I
EXT
= 20mA
EXT high
EXT low
2.2
1.6
0.4
+1
45
80
1.23
525
SET = GND
SET = V
CC
0.4
2.4
2.20
2.37
2.30
25
0.001
0.5
3.0
0.5
1.0
50
85
1.25
575
6
2
1.5
3.2
55
90
1.27
625
50
4
3
4.2
50
1
0.6
3.6
CONDITIONS
MIN
2.5
TYP
MAX
5.5
2.5
1.5
2.47
UNITS
V
V
V
µA
µA
µs
µs
%
V
mV
nA
Ω
ms
V
V
µA
Note 1:
Actual startup voltage is dependent on the external MOSFET’s V
GS(TH)
.
Note 2:
Specification applies after soft-start mode is completed.
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Analogue and Mixed Signal
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