MAX15108 Datasheet, PDF (6/19 Pages) Maxim Integrated Products – High-Efficiency, 8A, Current-Mode Synchronous Step-Down Switching Regulator

High-Efficiency, 8A, Current-Mode
Synchronous Step-Down Switching Regulator
Typical Operating Characteristics (continued)
(Circuit of Typical Application Circuit, TA = +25NC, unless otherwise noted.)
SHUTDOWN WAVEFORM (ILOAD = 8A)
MAX15108 toc10
V_EN
2V/div
VLX
5V/div
ILX
5A/div
10µs/div
V_OUT
VPGOOD
1V/div
SOFT-START WAVEFORMS (ILOAD = 8A)
MAX15108 toc11
VEN
2V/div
1ms/div
V_LX
2V/div
ILX
5A/div
V_OUT
1V/div
VPGOOD
2V/div
INPUT SHUTDOWN CURRENT
vs. SUPPLY VOLTAGE
2.0
1.6
1.2
INPUT CURRENT vs. INPUT VOLTAGE
5
NO-LOAD, SKIP MODE
4
3
0.8
2
0.4
1
0
2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5
SUPPLY VOLTAGE (V)
OVERLOAD HICCUP MODE
MAX15108 toc14
VOUT = 0V ONLY IN A SHORT
400µs/div
IIN
2A/div
V_OUT
1V/div
IOUT
10A/div
0
2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5
INPUT VOLTAGE (V)
RMS INPUT CURRENT
vs. SUPPLY VOLTAGE
1.0
0.9 ^{SHORT-CIRCUIT ON OUTPUT}
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5
SUPPLY VOLTAGE (V)
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