Rainbow Electronics MAX8575 User Manual
Page 2
MAX8570–MAX8575
High-Efficiency LCD Boost
with True Shutdown
2
_______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V
CC
= V
SHDN
= 3.6V, SW floating, V
FB
= 1.3V (MAX8570/MAX8571/MAX8574) or V
OUT
= 16V (MAX8572/MAX8573/MAX8575), T
A
=
-40°C to +85°C, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 1)
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.
V
CC
, SHDN to GND ..................................................-0.3V to +6V
SW to GND .................................................-0.3V to (V
CC
+ 0.3V)
FB to GND (MAX8570/MAX8571/
MAX8574)...............................................-0.3V to (V
CC
+ 0.3V)
OUT to GND (MAX8572/MAX8573/MAX8575) .......-0.3V to +30V
LX to GND ..............................................................-0.3V to +30V
I
LX
, I
CC
..............................................................................600mA
Continuous Power Dissipation (T
A
= +70°C)
SOT23-6 (derate 8.7 mW/°C above +70°C).............695.7 mW
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
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
V
CC
Input Voltage Range
2.70
5.50
V
V
CC
Undervoltage Lockout
V
CC
rising, 50mV typical hysteresis
2.33
2.5
2.65
V
V
CC
Supply Current
25
35
µA
T
A
= +25
°C
0.05
1
V
CC
Shutdown Current
SHDN = GND, V
CC
= 5.5V
T
A
= -40
°C to +85°C
0.05
µA
Line Regulation
Circuit of Figure 3, V
OUT
= 15V, I
LOAD
= 5mA,
V
CC
= 2.7V to 5.5V
0.1
%/V
Load Regulation
Circuit of Figure 3, V
OUT
= 15V, I
LOAD
= 0 to 5mA
0.1
%/mA
T
A
= 0
°C to +85°C
1.216
1.226
1.236
FB Regulation Voltage
T
A
= -40
°C to +85°C
1.2137
1.2383
V
FB Input Bias Current
-50
-4
+50
nA
T
A
= 0
°C to +85°C
14.85
15
15.15
OUT Regulation Voltage
T
A
= -40
°C to +85°C
14.813
15.187
V
OUT Input Bias Current
V
OUT
= 15V
2.4
4.4
µA
LX Voltage Range
28
V
MAX8571/MAX8573
0.217
0.241
0.267
MAX8570/MAX8572
0.088
0.101
0.108
LX Switch Current Limit (Note 2)
MAX8574/MAX8575
0.425
0.484
0.540
A
MAX8571/MAX8573/MAX8574/MAX8575, I
LX
= 100mA
0.9
1.5
LX On-Resistance
MAX8570/MAX8572, I
LX
= 50mA
1.5
2.4
Ω
T
A
= +25
°C
0.01
2
LX Leakage Current
V
LX
= 28V
T
A
= -40
°C to +85°C
0.05
µA
Maximum LX On-Time
8
11
14
µs
V
FB
> 1V or V
OUT
> 12.2V
0.8
1
1.2
Minimum LX Off-Time
V
FB
= 0.25V or V
OUT
= 3.4V
4.0
5
6.0
µs
Current-Limit Propagation Delay
55
ns
SHDN Low Level (V
IL
)
2.7V
≤ V
CC
≤ 5.5V
0.7
V
4.2V
≤ V
CC
≤ 5.5V
1.5
SHDN High Level (V
IH
)
2.7V
≤ V
CC
< 4.2V
1.4
V
SHDN Leakage Current
-1
+1
µA