Typical operating characteristics (continued) – Rainbow Electronics MAX15032 User Manual
Page 4
MAX15032
500kHz, 36V Output, 600mW PWM
Step-Up DC-DC Converter
4
_______________________________________________________________________________________
EFFICIENCY
vs. LOAD CURRENT
MAX15032 toc04
LOAD CURRENT (mA)
EFFICIENCY (%)
45
40
30 35
10 15 20 25
5
40
45
50
55
60
65
70
75
80
85
90
35
0
50
V
OUT
= 12V
V
IN
= 3.3V
V
OUT
= 12V
V
IN
= 5V
L
= 3.3
μH
MAXIMUM LOAD CURRENT
vs. INPUT VOLTAGE
MAX15032 toc05
INPUT VOLTAGE (V)
MAXIMUM LOAD CURRENT (mA)
10
9
7
8
4
5
6
3
30
60
90
120
150
180
210
240
270
300
330
360
0
2
11
L = 4.7
μH FOR V
OUT
= 36V, 30V, AND 24V
V
OUT
= 12V
L = 3.3
μH
V
OUT
= 24V
V
OUT
= 30V
V
OUT
= 36V
MINIMUM STARTUP VOLTAGE
vs. LOAD CURRENT
MAX15032 toc06
LOAD CURRENT (mA)
MINIMUM STARTUP VOLTAGE (V)
18
16
12 14
4
6
8
10
2
2.35
2.40
2.45
2.50
2.55
2.60
2.65
2.70
2.75
2.80
2.30
0
20
V
OUT
= 30V
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
MAX15032 toc07
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (mA)
10
9
3
4
5
7
6
8
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
0
2
11
V
FB
= 1.4V
SUPPLY CURRENT
vs. TEMPERATURE
MAX15032 toc08
TEMPERATURE (
°C)
SUPPLY CURRENT (mA)
110
95
65 80
-10 5
20 35 50
-25
0.55
0.60
0.65
0.70
0.75
0.80
0.85
0.90
0.95
1.00
0.50
-40
125
V
FB
= 1.4V
SWITCHING FREQUENCY
vs. TEMPERATURE
MAX15032 toc09
TEMPERATURE (
°C)
SWITCHING FREQUENCY (kHz)
110
95
65 80
-10 5
20 35 50
-25
460
470
480
490
500
510
520
530
540
550
450
-40
125
V
IN
= 5V
EXITING SHUTDOWN
MAX15032 toc10
1ms/div
V
SHDN
2V/div
V
OUT
10V/div
I
L
500mA/div
V
IN
= 5V
I
OUT
= 1mA
ENTERING SHUTDOWN
MAX15032 toc11
20ms/div
V
SHDN
2V/div
V
OUT
10V/div
V
IN
= 5V
I
OUT
= 1mA
SWITCHING WAVEFORMS
MAX15032 toc12
1
μs/div
V
OUT
(AC-COUPLED)
50mV/div
V
LX
20V/div
I
L
500mA/div
I
OUT
= 20mA
Typical Operating Characteristics (continued)
(V
IN
= 3.3V, L1 = 4.7µH, R1 = 143k
Ω, R2 = 6.2kΩ, C
IN
= 10µF, C
OUT
= 2.2µF, C
CP
= 10nF, see the
Typical Operating Circuit.
T
A
= +25°C, unless otherwise noted.)