Wide-Input, High-Frequency, Triple-Output Supplies
with Voltage Monitor and Power-On Reset
Typical Operating Characteristics (continued)
(Circuit of MAX8513 evaluation kit, V IN = 12V, T A = +25 ° C, f S = 1.4MHz, unless otherwise noted.)
STAGGERED SEQUENCE (SEQ = GND)
MAX8513/14 toc16
SYNC/EN
TRACKING SEQUENCE (SEQ = VL)
MAX8513/14 toc17
SYNC/EN
0V
5V/div
0V
5V/div
0V
0V
0V
0A
2ms/div
OUTPUT1 SHORT CIRCUIT
(ALL OUTPUTS AT FULL LOAD)
MAX8513/14 toc18
20 μ s/div
V OUT3
5V/div
V OUT1
2V/div
V OUT2
2V/div
V OUT1
2V/div
V LX
10V/div
1 L
2A/div
0V
0V
0V
0A
4ms/div
OUTPUT1 SHORT CIRCUIT
(ALL OUTPUTS AT NO LOAD)
MAX8513/14 toc19
20 μ s/div
V OUT3
5V/div
V OUT1
2V/div
V OUT2
2V/div
V OUT1
2V/div
V LX
10V/div
I L
2A/div
OUTPUT RIPPLE AND HARMONICS
(MEASURED AT OUT1)
1.5
1.3
1.1
0.9
0.7
0.5
0.3
0.1
-0.1
-0.3
-0.5
V IN = 12V
V OUT1 = 3.3V AT 2A
V OUT2 = 2.5V AT 1.5A
V OUT3 = 12V AT 50mA
100
1100
2100
3100
4100
5100
FREQUENCY (kHz)
______________________________________________________________________________________
11
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