MAX5003 Maxim Integrated Products, MAX5003 Datasheet - Page 4

• Manufacturer Part Number: MAX5003
• Description: High-voltage PWM Power-supply Controller
• Manufacturer: Maxim Integrated Products

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