MAX5003 データシートの表示（PDF） - Maxim Integrated
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MAX5003 Datasheet PDF : 16 Pages
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High-Voltage PWM
Power-Supply Controller
ELECTRICAL CHARACTERISTICS (continued)
(V+ = VES = VDD = +12V, VINDIV = 2V, VCON = 0, RFREQ = RMAXTON = 200kΩ, TA = TMIN to TMAX, unless otherwise noted. Typical
values are at TA = +25°C.)
PARAMETERS
SYMBOL
CONDITIONS
MIN
PWM OSCILLATOR
MAXTON Resistor Range
RMAXTON
50
Maximum On-Time Range
tON
RMAXTON = 200kΩ, VINDIV = 1.25V
Input Voltage Feed Forward
Ratio
VINDIV stepped from 1.5V to 1.875V, VCON =
3.0V (Note 3)
0.72
RAMP Voltage Low
RAMP Voltage High
Minimum On-Time
SOFT-START
SS Source Current
SS Sink Current
SS Time
PWM COMPARATOR
CON Bias Current
THERMAL SHUTDOWN
Thermal Shutdown Temperature
Thermal Hysteresis
ICON
VINDIV = 1.875V
0.48
VSS = 0.5V, VDD = unconnected, VCON = 1.5V 3.4
VSS = 0.4V (Note 4)
VCON = 0.5V and 2.5V
-1
TYP
7.5
0.8
0.5
2.5
200
5.5
10
0.45
0.01
150
20
MAX UNITS
500
kΩ
µs
0.88
0.53
V
V
ns
9
µA
mA
s/µF
1
µA
°C
°C
Note 1: See the Typical Operating Characteristics for preregulator current-to-voltage characteristics.
Note 2: Maximum time FREQ can be held below VIL and still remain in external mode.
Note 3: Feed-forward Ratio = Duty cycle at (VINDIV = 1.5V)/Duty cycle at (VINDIV = 1.875V)
Note 4: Occurs at start-up and until VREF is valid.
Typical Operating Characteristics
(VDD = +12V, RFREQ = 200kΩ, RMAXTON = 200kΩ, TA = +25°C, unless otherwise noted.)
FB SET-POINT VOLTAGE CHANGE
vs. TEMPERATURE
0.8
0.6
0.4
0.2
0
-0.2
-0.4
-0.6
0.8
-20 0 20 40 60 80 100
TEMPERATURE (°C)
FB SET-POINT VOLTAGE CHANGE
vs. SUPPLY VOLTAGE
0.100
0.075
0.050
0.025
0
-0.025
-0.050
-0.075
-0.100
11 12 13 14 15 16 17 18
VDD (V)
SWITCHING FREQUENCY CHANGE
vs. TEMPERATURE
0.40
0.20
0
-0.20
-0.40
-0.60
-0.80
-1.00
-1.20
-40 -20
0 20 40 60
TEMPERATURE (°C)
80 100
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