Typical operating characteristics (continued) – Rainbow Electronics MAX5071 User Manual
Page 7
MAX5070/MAX5071
High-Performance, Single-Ended, Current-Mode
PWM Controllers
_______________________________________________________________________________________
7
REFERENCE VOLTAGE (VREF)
vs. TEMPERATURE
MAX5070 toc04
TEMPERATURE (°C)
V
VREF
(V)
110
95
65 80
-10 5
20 35 50
-25
-40
125
4.6
4.7
4.8
4.9
5.0
5.1
5.2
5.3
5.4
5.5
4.5
I
REF
= 20mA
I
REF
= 1mA
REFERENCE VOLTAGE (VREF)
vs. REFERENCE LOAD CURRENT
MAX5070 toc05
I
REF
(mA)
V
VREF
(V)
45
30
15
4.80
4.85
4.90
4.95
5.00
5.05
5.10
5.15
5.20
5.25
4.75
0
REFERENCE VOLTAGE (VREF)
vs. V
CC
VOLTAGE
MAX5070 toc06
V
CC
(V)
V
VREF
(V)
24
22
20
18
16
14
12
4.995
5.000
5.005
5.010
4.990
10
26
I
REF
= 1mA
OSCILLATOR FREQUENCY (f
OSC
)
vs. TEMPERATURE
MAX5070 toc07
TEMPERATURE (°C)
OSCILLATOR FREQUENCY (kHz)
110
95
65 80
-10 5
20 35 50
-25
-40
125
460
470
480
490
500
510
520
530
540
550
450
R
T
= 3.01kΩ
C
T
= 1nF
OSCILLATOR R
T
/C
T
DISCHARGE CURRENT
vs. TEMPERATURE
MAX5070 toc08
TEMPERATURE (°C)
R
T
/C
T
DISCHARGE CURRENT (mA)
110
95
65 80
-10 5
20 35 50
-25
8.05
8.10
8.15
8.20
8.25
8.30
8.35
8.40
8.45
8.50
8.55
8.60
8.00
-40
125
V
RT/CT
= 2V
MAXIMUM DUTY CYCLE
vs. TEMPERATURE
MAX5070 toc09
TEMPERATURE (°C)
DUTY CYCLE (%)
110
95
65 80
-10 5
20 35 50
-25
-40
125
10
20
30
40
50
60
70
80
90
100
0
R
T
= 3.01kΩ
C
T
= 1nF
MAX5070A/MAX5071A
MAX5070B/MAX5071B/MAX5071C
MAX5070A/MAX5071A
MAXIMUM DUTY CYCLE vs. FREQUENCY
MAX5070 toc10
OSCILLATOR FREQUENCY (kHz)
DUTY CYCLE (%)
1200
1600
30
20
10
40
50
60
70
80
90
100
0
0
400
800
2000
C
T
= 100pF
C
T
= 1nF
C
T
= 560pF
C
T
= 220pF
CURRENT-SENSE (CS) TRIP THRESHOLD
vs. TEMPERATURE
MAX5070 toc11
TEMPERATURE (°C)
CS THRESHOLD (V)
110
95
65 80
-10 5
20 35 50
-25
-40
125
0.92
0.94
0.96
0.98
1.00
1.02
1.04
1.06
1.08
1.10
0.90
Typical Operating Characteristics (continued)
(V
CC
= 15V, T
A
= +25°C, unless otherwise noted.)