Datasheet

0.8
-0.4
-0.6
0
-0.2
0.6
0.4
0.2
0.8
0-20 20 40 60 80 100
FB SET-POINT VOLTAGE CHANGE
vs. TEMPERATURE
MAX5003-01
TEMPERATURE (°C)
FB SET-POINT VOLTAGE CHANGE (%)
-0.100
-0.050
-0.075
0
-0.025
0.075
0.050
0.025
0.100
11 1312 14 15 16 17 18
FB SET-POINT VOLTAGE CHANGE
vs. SUPPLY VOLTAGE
MAX5003-02
V
DD
(V)
FB SET-POINT VOLTAGE CHANGE (%)
-1.20
-0.80
-1.00
-0.40
-0.60
0.20
0
-0.20
0.40
-40 0-20 20 40 60 80 100
SWITCHING FREQUENCY CHANGE
vs. TEMPERATURE
MAX5003-03
TEMPERATURE (°C)
FREQUENCY CHANGE (%)
Typical Operating Characteristics
(V
DD
= +12V, R
FREQ
= 200kΩ, R
MAXTON
= 200kΩ, T
A
= +25°C, unless otherwise noted.)
MAX5003
High-Voltage PWM
Power-Supply Controller
4 _______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS (continued)
(V+ = V
ES
=
V
DD
= +12V, V
INDIV
= 2V, V
CON
= 0, R
FREQ
= R
MAXTON
= 200kΩ, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical
values are at T
A
= +25°C.)
Note 1: See the Typical Operating Characteristics for preregulator current-to-voltage characteristics.
Note 2: Maximum time FREQ can be held below V
IL
and still remain in external mode.
Note 3: Feed-forward Ratio = Duty cycle at (V
INDIV
= 1.5V)/Duty cycle at (V
INDIV
= 1.875V)
Note 4: Occurs at start-up and until V
REF
is valid.
CONDITIONS UNITS MIN TYP MAXSYMBOLPARAMETERS
Minimum On-Time
200
ns
SS Source Current V
SS
= 0.5V, V
DD
= unconnected, V
CON
= 1.5V
3.4 5.5 9
µA
SS Sink Current V
SS
= 0.4V (Note 4)
10
mA
SS Time
0.45
s/µF
CON Bias Current I
CON
V
CON
= 0.5V and 2.5V
-1 0.01 1
µA
R
MAXTON
= 200kΩ, V
INDIV
= 1.25V µs
7.5
t
ON
Maximum On-Time Range
V
INDIV
= 1.875V V
0.48 0.5 0.53
RAMP Voltage Low
V
2.5
RAMP Voltage High
V
INDIV
stepped from 1.5V to 1.875V, V
CON
=
3.0V (Note 3)
0.72 0.8 0.88
Input Voltage Feed Forward
Ratio
kΩ50 500R
MAXTON
MAXTON Resistor Range
PWM COMPARATOR
SOFT-START
PWM OSCILLATOR
Thermal Shutdown Temperature
150
°C
Thermal Hysteresis
20
°C
THERMAL SHUTDOWN