MAX5068 データシートの表示（PDF） - Maxim Integrated
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MAX5068
Maxim Integrated
MAX5068 Datasheet PDF : 20 Pages
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High-Frequency, Current-Mode PWM Controller
with Accurate Programmable Oscillator
Typical Operating Characteristics
(VIN = +12V for the MAX5068B/E/F; VIN = +23.6V for MAX5068A/C/D at startup, then reduces to +12V; CIN = CREG5 = 0.1µF;
CVCC = 1µF; RRT = 100kΩ; NDRV = floating; VFB = 0; VCOMP = floating; VCS = 0; TA = +25°C, unless otherwise noted.)
BOOTSTRAP UVLO WAKE-UP LEVEL
vs. TEMPERATURE
21.6
MAX5068A/C/D
21.5
BOOTSTRAP UVLO SHUTDOWN LEVEL
vs. TEMPERATURE
10.0
VIN FALLING
MAX5068A/C/D
9.9
UVLO/EN WAKE-UP THRESHOLD
vs. TEMPERATURE
1.245
UVLO/EN RISING
1.240
21.4
9.8
1.235
21.3
9.7
1.230
21.2
9.6
1.225
21.1
21.0
-40 -15 10 35 60 85 110
TEMPERATURE (°C)
9.5
-40 -15 10 35 60 85 110
TEMPERATURE (°C)
1.220
-40 -15 10 35 60 85 110
TEMPERATURE (°C)
UVLO/EN SHUTDOWN THRESHOLD
vs. TEMPERATURE
1.20
UVLO/EN FALLING
1.19
1.18
1.17
1.16
1.15
1.14
1.13
1.12
1.11
1.10
-40 -15 10 35 60 85 110
TEMPERATURE (°C)
VCC vs. TEMPERATURE
10.0
9.7
VIN = 19V, IIN = 10mA
9.4 VIN = 19V, IIN = 25mA
9.1
8.8
8.5
8.2
7.9 VIN = 10.8V, IIN = 10mA
7.6
7.3
VIN = 10.8V, IIN = 25mA
7.0
-40 -15 10 35 60 85 110
TEMPERATURE (°C)
VIN SUPPLY CURRENT IN
UNDERVOLTAGE LOCKOUT vs. TEMPERATURE
60
VIN = 19V
WHEN IN BOOTSTRAP UVLO (MAX5068A/C/D)
56 UVLO/EN (MAX5068B/E/F) IS LOW
52
48
44
40
-40 -15 10 35 60 85 110
TEMPERATURE (°C)
REG5 OUTPUT VOLTAGE
vs. OUTPUT CURRENT
4.980
RRT = 100kΩ
4.975
4.970
4.965
4.960
4.955
4.950
0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0
OUTPUT CURRENT (mA)
VIN SUPPLY CURRENT AFTER STARTUP
vs. TEMPERATURE
6
VIN = 24V
5
fSW = 1.25MHz
4
fSW = 500kHz
3
fSW = 250kHz
2
1
-40
fSW = 100kHz
fSW = 50kHz
-15 10 35 60 85 110
TEMPERATURE (°C)
REG5 vs. TEMPERATURE
5.00
VIN = 10.8V
4.99
4.98
100µA LOAD
4.97
4.96
1mA LOAD
4.95
4.94
4.93
4.92
4.91
4.90
-40 -15 10 35 60 85 110
TEMPERATURE (°C)
_______________________________________________________________________________________ 5
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