ADP1875 Analog Devices, ADP1875 Datasheet - Page 16
![no-image](/images/manufacturer_photos/0/0/56/analog_devices_sml.jpg)
ADP1875
Manufacturer Part Number
ADP1875
Description
Synchronous Buck Controller with Constant On-Time, Valley Current Mode, and Power Saving Mode
Manufacturer
Analog Devices
Datasheet
1.ADP1874.pdf
(44 pages)
- Current page: 16 of 44
- Download datasheet (3Mb)
ADP1874/ADP1875
Figure 52. Negative Step During Heavy Load Transient Behavior—Forced PWM
Figure 53. Output Short-Circuit Behavior Leading to Hiccup Mode
2
1
3
4
1
2
4
3
1
2
3
4
CH1 10A Ω
CH3 20V
CH1 2V
CH3 10V
CH1 5V
CH3 10V
INDUCTOR CURRENT
OUTPUT VOLTAGE
at Light Load, 12 A (See Figure 99 Application Circuit)
Figure 54. Magnified Waveform During Hiccup Mode
SW NODE
SW NODE
LOW SIDE
B
B
W
W
LOW
SIDE
CH2 200mV
CH4 5V
CH2 5A Ω
CH4 5V
CH2 10A Ω
CH4 5V
B
W
M10µs
M4ms
M10µs
T
T
T
12A NEGATIVE STEP
OUTPUT VOLTAGE
23.8%
49.4%
36.2%
INDUCTOR CURRENT
OUTPUT VOLTAGE
LOW SIDE
SW NODE
A CH1
A CH1
A CH2
920mV
5.60A
8.20A
Rev. 0 | Page 16 of 44
Figure 57. Output Voltage Ripple Waveform During PSM Operation
1
2
4
3
1
2
4
3
1
2
3
4
Figure 55. Start-Up Behavior at Heavy Load, 12 A, 300 kHz
CH1 2V
CH3 10V
CH1 2V
CH3 10V
CH1 50mV
CH3 10V
Figure 56. Power-Down Waveform During Heavy Load
OUTPUT VOLTAGE
LOW SIDE
SW NODE
B
B
W
W
B
W
B
(See Figure 99 Application Circuit)
W
CH2 5A Ω
CH2 5A Ω
CH4 5V
CH4 5V
CH2 5A Ω
CH4 5V
INDUCTOR CURRENT
OUTPUT VOLTAGE
at Light Load, 2 A
LOW SIDE
SW NODE
OUTPUT VOLTAGE
INDUCTOR CURRENT
LOW SIDE
SW NODE
M2ms
M4ms
M2µs
T
T
T
32.8%
41.6%
35.8%
INDUCTOR CURRENT
A CH1
A CH1
A CH2
720mV
720mV
3.90A
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