参数资料
型号: MAX8574EUT+T
厂商: Maxim Integrated Products
文件页数: 3/11页
文件大小: 0K
描述: IC CONV LCD BOOST SOT23-6
产品培训模块: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
标准包装: 2,500
应用: 转换器,LCD
输入电压: 2.7 V ~ 5.5 V
输出数: 1
输出电压: 2.7 V ~ 28 V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: SOT-23-6
供应商设备封装: SOT-6
包装: 带卷 (TR)
High-Efficiency LCD Boost
with True Shutdown
ELECTRICAL CHARACTERISTICS (continued)
(V CC = V SHDN = 3.6V, SW open, 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)
PARAMETER
SW PMOS Current Limit
SW PMOS On-Resistance
CONDITIONS
V CC = 3.6V, V SW = 0V, V FB = 0V, I CC (peak)
V CC = 3.6V, V SW = 0V, V FB = 0V, I CC (average)
V CC = 2.7V, V FB = 0V, I SW = 100mA
MIN
0.45
0.15
TYP
0.75
0.30
1.5
MAX
1.10
0.60
2.5
UNITS
A
Ω
SW PMOS Leakage Current
SW Soft-Start Time
SW = GND, V CC = 5.5V, V FB = 0V
V CC = 2.7V, C SW = 4.7μF
T A = +25 ° C
T A = -40 ° C to +85 ° C
0.01
0.02
0.2
1
1
μA
ms
Note 1: Parameters are production tested at T A = +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).
Typical Operating Characteristics
(MAX8571, V CC = 3.6V, V OUT = 18V, Circuit of Figure 2, T A = +25 ° C, unless otherwise noted.)
18.5
OUTPUT VOLTAGE
vs. SUPPLY VOLTAGE (MAX8571)
OUTPUT VOLTAGE
vs. SUPPLY VOLTAGE (FIGURE 3, MAX8573)
15.5
19.0
OUTPUT VOLTAGE
vs. SUPPLY VOLTAGE (MAX8574)
18.4
18.3
18.2
18.1
5mA LOAD
15.4
15.3
15.2
15.1
1mA LOAD
18.8
18.6
18.4
18.2
5mA LOAD
18.0
17.9
1mA LOAD
15.0
14.9
5mA LOAD
18.0
17.8
20mA LOAD
17.8
17.7
14.8
14.7
17.6
17.4
17.6
17.5
L1 = MURATA LQH32CN220K23
R1 = 3.9M Ω , R2 = 287k Ω
14.6
14.5
L1 = MURATA LQH32CN220K23
17.2
17.0
L1 = TOKO S1024-100M
R1 = 1.1M Ω , R2 = 75k Ω , C4 = 4.7pF
2.7
3.1
3.5
3.9
4.3
4.7
5.1
5.5
2.7
3.1
3.5
3.9
4.3
4.7
5.1
5.5
3.1
3.4
3.7
4.0
4.3
4.6
4.9
SUPPLY VOLTAGE (V)
OUTPUT VOLTAGE
vs. LOAD CURRENT
SUPPLY VOLTAGE (V)
OUTPUT VOLTAGE vs. TEMPERATURE
SUPPLY VOLTAGE (V)
EFFICIENCY vs. SUPPLY VOLTAGE
19.0
L1 = MURATA LQH32CN220K23
18.4
100
18.8
18.6
18.4
18.2
MAX8574, R1 = 1.1MΩ, R2 = 75kΩ, C4 = 4.7pF
18.3
18.2
18.1
18.0
95
90
85
L1 = TOKO A914BYW-470M
47μH, 5mA LOAD
47μH, 1mA LOAD
18.0
17.8
17.9
17.8
80
22μH, 5mA LOAD
22μH, 1mA LOAD
17.6
MAX8570
MAX8571
17.7
75
L1 = MURATA LQH32CN220K23
17.4
R1 = 3.9MΩ, R2 = 287kΩ, C4 = 10pF
17.6
1mA LOAD
70
0
5
10
15
20
25
-40
-15
10
35
60
85
2.7
3.1
3.5
3.9
4.3
4.7
5.1
5.5
LOAD CURRENT (mA)
TEMPERATURE ( ° C)
SUPPLY VOLTAGE (V)
_______________________________________________________________________________________
3
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