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ADP1871ARMZ-0.3-R7 датащи(PDF) 15 Page - Analog Devices

номер детали ADP1871ARMZ-0.3-R7
подробное описание детали  Synchronous Buck Controller with Constant On-Time and Valley Current Mode
PDF  44 Pages
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производитель  AD [Analog Devices]
домашняя страница  http://www.analog.com
Logo AD - Analog Devices

ADP1871ARMZ-0.3-R7 датащи(HTML) 15 Page - Analog Devices

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ADP1870/ADP1871
Rev. 0 | Page 15 of 44
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
12A NEGATIVE STEP
SW NODE
LOW
SIDE
Figure 52. Negative Step During Heavy Load Transient Behavior—Forced PWM
at Light Load, 12 A (See Figure 93 Application Circuit)
CH1 2V BW 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
Figure 53. Output Short-Circuit Behavior Leading to Hiccup Mode
CH1 5V BW 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
Figure 54. Magnified Waveform During Hiccup Mode
CH1 2V BW 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
Figure 55. Start-Up Behavior at Heavy Load, 12 A, 300 kHz
(See Figure 93 Application Circuit)
CH1 2V BW 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
Figure 56. Power-Down Waveform During Heavy Load
CH1 50mV BW CH2 5A Ω
CH3 10V BW
CH4 5V
M2µs
A CH2
3.90A
T 35.8%
1
2
3
4
OUTPUT VOLTAGE
INDUCTOR CURRENT
SW NODE
LOW SIDE
Figure 57. Output Voltage Ripple Waveform During PSM Operation
at Light Load, 2 A



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