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MAX5003CSE

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16
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
MAX5003
High-Voltage PWM
Power-Supply Controller
_______________________________________________________________________________________ 5
0
1.0
0.5
2.0
1.5
2.5
3.0
20 6040 80 100 120
V+ INPUT CURRENT vs. VOLTAGE
MAX5003-04
V+ (V)
I
V
+ (mA)
V
CON
= V
COMP
= V
FB
SWITCHING
0
0.50
1.00
2.00
1.50
2.50
-40 0-20 20 40 60 80 100
V+ INPUT CURRENT vs. TEMPERATURE
MAX5003-05
TEMPERATURE (°C)
I
V
+ (mA)
V
CON
= V
COMP
= V
FB
SWITCHING
V+ = 110V
MAX5003-06
0
20
10
40
30
70
60
50
80
1.0 1.5 2.0
2.5
3.0
MAXIMUM DUTY CYCLE vs. V
INDIV
V
INDIV
(V)
DUTY CYCLE (%)
400kΩ
PARAMETER IS
R
MAXTON
100kΩ
V
CON
CLAMPED HIGH
300kΩ
200kΩ
70
-20
0.1k 1k 10k 100k 1M 10M
ERROR AMP FREQUENCY RESPONSE
-10
0
MAX5003-07
FREQUENCY (Hz)
GAIN (dB)
20
10
50
60
40
30
0
-180
-160
-140
PHASE (degrees)
-100
-120
-40
-20
-60
-80
PHASE
GAIN
MAX5003-08
0
100
50
200
150
350
300
250
400
0 100 200 300
400
500
SWITCHING FREQUENCY AND PERIOD
vs. R
FREQ
R
FREQ
(kΩ)
FREQUENCY (kHz)
0
10
20
30
40
PERIOD (µs)
FREQUENCY
PERIOD
30
32
31
34
33
38
37
36
35
40
39
-40 0-20 20 40 60 80 100
V+ SHUTDOWN CURRENT
vs. TEMPERATURE
MAX5003-09
TEMPERATURE (°C)
I
V
+ (µA)
V+ = 110V
V
INDIV
= 0
V
DD
= UNCONNECTED
28.0
27.5
27.0
26.5
26.0
-50 0 50 100
V+ CURRENT IN BOOTSTRAPPED
OPERATION vs. TEMPERATURE
MAX5003-10
TEMPERATURE (°C)
I
V
+ (µA)
V+ = 110V
V
INDIV
= 1.5V
0
2
3
4
5
6
7
8
9
10
0 5 10 15 20
V
CC
LOAD REGULATION
MAX5003-11
I
CC
(mA)
V
CC
(V)
1
V+ = 50V TO 110V
ES = UNCONNECTED
V
DD
= UNCONNECTED
V+ = 12V
V+ = 13V
V+ = 15V
V+ = 14V
Typical Operating Characteristics (continued)
(V
DD
= +12V, R
FREQ
= 200kΩ, R
MAXTON
= 200kΩ, T
A
= +25°C, unless otherwise noted.)
MAX5003
High-Voltage PWM
Power-Supply Controller
6 _______________________________________________________________________________________
0
2
3
4
5
6
7
8
9
10
0 5 10 15 20
V
CC
LOAD REGULATION
MAX5003-12
I
CC
(mA)
V
CC
(V)
1
V+
=
V
ES
=
12V TO 36V
V
DD = UNCONNECTED
MAX5003-13
0
50
150
100
300
250
200
350
12 13 14
15
16
MAXIMUM FREQUENCY vs. INPUT VOLTAGE
AND FET TOTAL GATE-SWITCHING CHARGE
V+ (V)
MAX SWITCHING FREQUENCY (kHz)
25nC
30nC
10nC
15nC
20nC
Pin Description
Typical Operating Characteristics (continued)
(V
DD
= +12V, R
FREQ
= 200kΩ, R
MAXTON
= 200kΩ, T
A
= +25°C, unless otherwise noted.)
NAME FUNCTION
1 V+
Preregulator Input. Connect to the power line for use with 25V to 110V line voltages. Bypass V+ to ground
with a 0.1µF capacitor, close to the IC. Connects internally to the drain of a depletion FET preregulator.
2 INDIV
Undervoltage Sensing and Feed-Forward Input. Connect to the center point of an external resistive divider
connected between the main power line and AGND. Undervoltage lockout takes over and shuts down
the controller when V
INDIV
< 1.2V. INDIV bias is typically 0.01µA.
PIN
3 ES
Preregulator Output. When V+ ranges above 36V, bypass ES to AGND with a 0.1µF capacitor close to
the IC. When V+ is always below 36V, connect ES to V+.
4 FREQ
Oscillator Frequency Adjust and Synchronization Input. In internal free-running mode, the voltage on this
pin is internally regulated to 1.25V. Connect a resistor between this pin and AGND to set the PWM fre-
quency. Drive between V
IL
and V
IH
at four times the desired frequency for external synchronization.
8 COMP Compensation Connection. Output of the error amplifier, available for compensation.
7 CON Control Input of the PWM Comparator
6 REF Reference Voltage Output (3.0V). Bypass to AGND with a 0.1µF capacitor.
5 SS
Soft-Start Capacitor Connection. Ramp time to full current limit is approximately 0.5ms/nF. Limits duty
cycle when V
SS
< V
CON
.
10 MAXTON
Maximum On-Time Programming. A resistor from MAXTON to AGND sets the PWM gain and limits the
maximum duty cycle. The voltage on MAXTON tracks the voltage on the INDIV pin. Maximum on-time is
proportional to the value of the programming resistor. The maximum duty cycle is limited to 75%, regard-
less of the programming resistor.
9 FB Feedback Input. Regulates to V
FB
= V
REF
/ 2 = 1.5V.
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16

MAX5003CSE

Mfr. #:
Buy MAX5003CSE
Manufacturer:
Maxim Integrated
Description:
Switching Controllers PWM Power-Supply Controller
Lifecycle:
New from this manufacturer.
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