Datasheet

Data Sheet ADP1872/ADP1873
Rev. B | Page 15 of 40
CH1 2V
B
W
CH2 5A Ω
CH3 10V CH4 5V
M4ms A CH1 920mV
T 49.4%
1
2
3
4
OUTPUT VOLTAGE
INDUCTOR CURRENT
SW NODE
LOW SIDE
08297-052
Figure 52. Output Short-Circuit Behavior Leading to Hiccup Mode
CH1 5V
B
W
CH2 10A Ω
CH3 10V CH4 5V
M10µs A CH2 8.20A
T 36.2%
1
2
3
4
OUTPUT VOLTAGE
INDUCTOR CURRENT
SW NODE
LOW SIDE
08297-053
Figure 53. Magnified Waveform During Hiccup Mode
CH1 2V
B
W
CH2 5A Ω
CH3 10V CH4 5V
M2ms A CH1 720mV
T 32.8%
1
2
3
4
OUTPUT VOLTAGE
INDUCTOR CURRENT
SW NODE
LOW SIDE
08297-054
Figure 54. Start-Up Behavior at Heavy Load, 18 A, 300 kHz
(See Figure 91 Application Circuit)
CH1 2V
B
W
CH2 5A Ω
CH3 10V CH4 5V
M4ms A CH1 720mV
T 41.6%
1
2
3
4
OUTPUT VOLTAGE
INDUCTOR CURRENT
SW NODE
LOW SIDE
08297-055
Figure 55. Power-Down Waveform During Heavy Load
CH1 50mV
B
W
CH2 5A Ω
CH3 10V
B
W
CH4 5V
M2µs A CH2 3.90A
T 35.8%
1
2
3
4
OUTPUT VOLTAGE
INDUCTOR CURRENT
SW NODE
LOW SIDE
08297-056
Figure 56. Output Voltage Ripple Waveform During PSM Operation
at Light Load, 2 A
CH1 1V
B
W
CH2 5A Ω
CH3 10V
B
W
CH4 2V
M1ms A CH1 1.56V
T 63.2%
1
2
3
4
OUTPUT VOLTAGE
INDUCTOR CURRENT
SW NODE
LOW SIDE
08297-057
Figure 57. Soft Start and RES Detect Waveform