Datasheet

ADP1872/ADP1873 Data Sheet
Rev. B | Page 14 of 40
CH1 10A Ω CH2 200mV
B
W
CH3 20V CH4 5V
M2ms A CH1 3.40A
T 75.6%
1
2
3
4
OUTPUT VOLTAGE
20A STEP
SW NODE
LOW SIDE
08297-046
Figure 46. Load Transient Step—PSM Enabled, 20 A
(See Figure 91 Application Circuit)
CH1 10A Ω CH2 200mV
B
W
CH3 20V CH4 5V
M20µs A CH1 3.40A
T 30.6%
1
2
3
4
OUTPUT VOLTAGE
20A POSITIVE STEP
SW NODE
LOW SIDE
08297-047
Figure 47. Positive Step During Heavy Load Transient Behavior—PSM Enabled,
20 A, V
OUT
= 1.8 V (See Figure 91 Application Circuit)
CH1 10A Ω CH2 200mV
B
W
CH3 20V CH4 5V
M20µs A CH1 3.40A
T 48.2%
1
2
3
4
OUTPUT VOLTAGE
20A NEGATIVE STEP
SW NODE
LOW SIDE
08297-048
Figure 48. Negative Step During Heavy Load Transient Behavior—PSM Enabled,
20 A (See Figure 91 Application Circuit)
CH1 10A Ω CH2 5V
CH3 20V CH4 200mV
B
W
M2ms A CH1 6.20A
T 15.6%
1
2
3
4
OUTPUT VOLTAGE
20A STEP
SW NODE
LOW SIDE
08297-049
Figure 49. Load Transient Step—Forced PWM at Light Load, 20 A
(See Figure 91 Application Circuit)
CH1 10A Ω CH2 5V
CH3 20V CH4 200mV
B
W
M20µs A CH1 6.20A
T 43.8%
1
2
3
4
OUTPUT VOLTAGE
20A POSITIVE STEP
SW NODE
LOW SIDE
08297-050
Figure 50. Positive Step During Heavy Load Transient Behavior—Forced PWM
at Light Load, 20 A, V
OUT
= 1.8 V (See Figure 91 Application Circuit)
CH1 10A Ω CH2 200mV
B
W
CH3 20V CH4 5V
M10µs A CH1 5.60A
T 23.8%
1
2
3
4
OUTPUT VOLTAGE
20A NEGATIVE STEP
SW NODE
LOW
SIDE
08297-051
Figure 51. Negative Step During Heavy Load Transient Behavior—Forced PWM
at Light Load, 20 A (See Figure 91 Application Circuit)