Datasheet

MAX5003
High-Voltage PWM
Power-Supply Controller
_______________________________________________________________________________________ 3
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 2)
V
FREQ
= 5V, V
CON
= 3.0V
V
CON
= 3.0V
V
CON
= 3.0V
From end of blanking time 25mV overdrive
0 < V
CS
< 0.1V
V
INDIV
= 1.28V
FB = COMP, V
CON
= 1.5V
V+ = V
ES
= V
DD
=
10.8V and 18.75V
At COMP
At COMP
I
COMP
= 5µA; V
COMP
= 0.5V, 2.5V
R
LOAD
= 200kΩ, C
LOAD
= 100pF
A
VOL
= 1V/V, C
LOAD
= 100pF
V
FB
= 1.5V
kHz
200 1200
f
FREQ
FREQ Range
µs
813
t
EXT
External Oscillator Maximum
Low Time
µA
1
I
OL
FREQ Output Low
V
2.7
V
IH
FREQ Input High
V
0.8
V
IL
FREQ Input Low
µA
-1 0.01 +1
INDIV Bias Current
mV
125
V
HYST
INDIV Hysteresis
1.23 1.32 1.45
V
1.15 1.20 1.25
V
INDIVLO
INDIV Undervoltage Lockout
ppm/°C
100
TC
FB
FB V
SET
Tempco
µA
-1 0.1 +1
I
FB
FB Bias Current
ns
70
t
B
CS Blanking Time
ns
240
t
D
µA
-1 +1
I
CS
CS Input Bias Current
Overcurrent Delay
V
1.448 1.485 1.522
V
SET
FB Regulation Voltage
V
3.00
V
COMPH
Output Clamp High
V
0.25
V
COMPL
Output Clamp Low
dB
60 80
A
V
Voltage Gain
MHz
1.2
BWUnity-Gain Bandwidth
degrees
65
φ
Phase Margin
f
S
= 1/4 f
FREQ
ns
150
FREQ HI/LO Pulse Width
kHz
50 300
f
S
Frequency Range
CONDITIONS UNITS MIN TYP MAXSYMBOLPARAMETERS
V
FREQ
= 1.5V
V
FREQ
= 0
µA
1
I
OL
FREQ Output Current Low
µA
300
I
OH
FREQ Output Current High
kHz
80 100 120
Oscillator Frequency
kΩ
50 500
R
FREQ
FREQ Resistor Range
V
INDIV
= 1.25V %
75
Maximum Programmable
Duty Cycle
V
CON
= 1.25V mV
80 100 120
V
CS
CS Threshold Voltage
MAXIMUM DUTY CYCLE (MAXTON)
MAIN OSCILLATOR—INTERNAL MODE
MAIN OSCILLATOR—EXTERNAL MODE
UNDERVOLTAGE LOCKOUT
FEEDBACK INPUT AND SET POINT
ERROR AMPLIFIER
CURRENT LIMIT
V
INDIV
falling
V
INDIV
rising