Interleaved High-Efficiency, Dual Power-Supply
Controllers for Notebook Computers
Typical Operating Characteristics (continued)
(Circuit of Figure 1, VIN = 12V, VDD = VCC = 5V, SKIP_ = GND, FSEL = REF, TA = +25°C, unless otherwise noted.)
DROPOUT WAVEFORMS
MAX8716/17/57 toc23
4.9V
A
5V
B
0
5V
C
3.3V
D
5V
E
0
2µs/div
A. OUT2, 50mV/div
D. OUT1, 50mV/div
B. LX2, 10V/div
E. LX1, 10V/div
C. VIN, 50mV/div
1.0A LOAD ON OUT1, 1.0A LOAD ON OUT2
SKIP1 = VCC, SKIP2 = VCC
OUT1 LOAD TRANSIENT
MAX8716/17/57 toc24
0
A
3.3V
B
3A
0
C
12V
D
0
20µs/div
A. CONTROL, 5V/div
B. OUT1, 50mV/div
C. ILX1, 3A/div
D. LX1, 10V/div
SKIP1 = VCC
SKIP1 TRANSITION
MAX8716/17/57 toc25
0
A
12V
B
0
3.3V
C
2.5A
0
D
20µs/div
A. SKIP1, 5V/div
C. OUT1, 50mV/div
B. LX1, 10V/div
D. ILX1, 2.5A/div
30mA LOAD ON OUT1
SKIP1 TRANSITION
MAX8716/17/57 toc26
0
A
12V
B
0
3.3V
C
2.5A
0
D
20µs/div
A. SKIP1, 5V/div
C. OUT1, 50mV/div
B. LX1, 10V/div
D. ILX1, 2.5A/div
30mA LOAD ON OUT1
SKIP1 TRANSITION
MAX8716/17/57 toc27
A
0
12V
B
0
3.3V
C
2.5A
0
D
20µs/div
A. SKIP1, 5V/div
C. OUT1, 50mV/div
B. LX1, 10V/div
D. ILX1, 2.5A/div
30mA LOAD ON OUT1
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