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MAX8570 데이터시트(PDF) 3 Page - Maxim Integrated Products

부품명 MAX8570
상세설명  High-Efficiency LCD Boost with True Shutdown
PDF  11 Pages
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제조업체  MAXIM [Maxim Integrated Products]
홈페이지  https://www.maximintegrated.com/en.html
Logo MAXIM - Maxim Integrated Products

MAX8570 데이터시트(HTML) 3 Page - Maxim Integrated Products

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High-Efficiency LCD Boost
with True Shutdown
_______________________________________________________________________________________
3
EFFICIENCY vs. SUPPLY VOLTAGE
SUPPLY VOLTAGE (V)
5.1
4.7
4.3
3.9
3.5
3.1
75
80
85
90
95
100
70
2.7
5.5
L1 = TOKO A914BYW-470M
47
µH, 1mA LOAD
47
µH, 5mA LOAD
L1 = MURATA LQH32CN220K23
22
µH, 5mA LOAD
22
µH, 1mA LOAD
Typical Operating Characteristics
(MAX8571, VCC = 3.6V, VOUT = 18V, Circuit of Figure 2, TA = +25
°C, unless otherwise noted.)
OUTPUT VOLTAGE
vs. SUPPLY VOLTAGE (MAX8571)
SUPPLY VOLTAGE (V)
5.1
4.7
3.9
4.3
3.5
3.1
17.6
17.7
17.8
17.9
18.0
18.1
18.2
18.3
18.4
18.5
17.5
2.7
5.5
L1 = MURATA LQH32CN220K23
R1 = 3.9M
Ω, R2 = 287kΩ
5mA LOAD
1mA LOAD
OUTPUT VOLTAGE
vs. SUPPLY VOLTAGE (FIGURE 3, MAX8573)
SUPPLY VOLTAGE (V)
5.1
4.7
3.9
4.3
3.5
3.1
14.6
14.7
14.8
14.9
15.0
15.1
15.2
15.3
15.4
15.5
14.5
2.7
5.5
L1 = MURATA LQH32CN220K23
5mA LOAD
1mA LOAD
OUTPUT VOLTAGE
vs. SUPPLY VOLTAGE (MAX8574)
SUPPLY VOLTAGE (V)
4.6
4.3
4.0
3.7
3.4
17.2
18.2
18.0
17.8
17.6
17.4
18.4
18.6
18.8
19.0
17.0
3.1
4.9
L1 = TOKO S1024-100M
R1 = 1.1M
Ω, R2 = 75kΩ, C4 = 4.7pF
5mA LOAD
20mA LOAD
OUTPUT VOLTAGE
vs. LOAD CURRENT
LOAD CURRENT (mA)
20
15
5
10
17.6
17.8
18.0
18.2
18.4
18.6
18.8
19.0
17.4
025
L1 = MURATA LQH32CN220K23
R1 = 3.9M
Ω, R2 = 287kΩ, C4 = 10pF
MAX8570
MAX8571
MAX8574, R1 = 1.1M
Ω, R2 = 75kΩ, C4 = 4.7pF
OUTPUT VOLTAGE vs. TEMPERATURE
TEMPERATURE (
°C)
60
35
10
-15
17.7
17.8
17.9
18.0
18.1
18.2
18.3
18.4
17.6
-40
85
1mA LOAD
Note 1: Parameters are production tested at TA = +25°C. Limits over temperature are guaranteed by design.
Note 2: Specified currents are measured at DC. Actual LX current limits are slightly higher in circuit due to current-limit comparator
delay. Actual currents (with 2µH) are 110mA (MAX8570/MAX8572), 250mA (MAX8571/MAX8573), and 500mA
(MAX8574/MAX8575).
ELECTRICAL CHARACTERISTICS (continued)
(VCC = V SHDN = 3.6V, SW open, VFB = 1.3V (MAX8570/MAX8571/MAX8574) or VOUT = 16V (MAX8572/MAX8573/MAX8575), TA =
-40°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
VCC = 3.6V, VSW = 0V, VFB = 0V, ICC (peak)
0.45
0.75
1.10
SW PMOS Current Limit
VCC = 3.6V, VSW = 0V, VFB = 0V, ICC (average)
0.15
0.30
0.60
A
SW PMOS On-Resistance
VCC = 2.7V, VFB = 0V, ISW = 100mA
1.5
2.5
Ω
TA = +25
°C
0.01
1
SW PMOS Leakage Current
SW = GND, VCC = 5.5V, VFB = 0V
TA = -40
°C to +85°C
0.02
µA
SW Soft-Start Time
VCC = 2.7V, CSW = 4.7µF
0.2
1
ms



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