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ADP2105ACPZ-3.3-R7 数据表(PDF) 11 Page - Analog Devices

部件名 ADP2105ACPZ-3.3-R7
功能描述  1 Amp/1.5 Amp/2 Amp Synchronous, Step-Down DC-to-DC Converters
PDF  32 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
制造商  AD [Analog Devices]
网页  http://www.analog.com
标志 AD - Analog Devices

ADP2105ACPZ-3.3-R7 数据表(HTML) 11 Page - Analog Devices

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ADP2105/ADP2106/ADP2107
Rev. 0 | Page 11 of 32
CH1 50mV
6%
CH4 200mAΩ
CH3 2V
M 2µs
A CH3
3.88V
T
3
4
1
INDUCTOR CURRENT
OUTPUT VOLTAGE (AC-COUPLED)
LX NODE
(SWITCH NODE)
CH1 20mV
17.4%
CH4 1AΩ
CH3 2V
M 1µs
A CH3
3.88V
T
3
4
1
LX NODE (SWITCH NODE)
OUTPUT VOLTAGE (AC-COUPLED)
INDUCTOR CURRENT
Figure 28. PFM Mode of Operation at Very Light Load (10 mA)
Figure 31. PWM Mode of Operation at Medium/Heavy Load (1.5 A)
CH1 50mV
17.4%
CH4 200mAΩ
CH3 2V
M 400ns
A CH3
3.88V
T
3
4
1
LX NODE (SWITCH NODE)
OUTPUT VOLTAGE (AC-COUPLED)
INDUCTOR CURRENT
CH1 1V
45%
CH4 1AΩ
CH3 5V
M 4µs
A CH3
1.8V
T
3
4
1
INDUCTOR CURRENT
OUTPUT VOLTAGE
CHANNEL 3
FREQUENCY
= 336.6kHz
Δ: 2.86A
@: 2.86A
LX NODE (SWITCH NODE)
Figure 29. DCM Mode of Operation at Light Load (100 mA)
Figure 32. Current Limit Behavior of ADP2107 (Frequency Foldback)
CH1 20mV
13.4%
CH4 1AΩ
CH3 2V
M 2µs
A CH3
1.84V
T
3
4
1
LX NODE (SWITCH NODE)
OUTPUT VOLTAGE (AC-COUPLED)
INDUCTOR CURRENT
CH1 1V
20.2%
CH4 500mAΩ
CH3 5V
M 400µs
A CH1
1.84V
T
3
4
1
ENABLE VOLTAGE
INDUCTOR CURRENT
OUTPUT VOLTAGE
Figure 30. Minimum Off Time Control at Dropout
Figure 33. Startup and Shutdown Waveform (CSS = 1 nF
→ SS Time = 1 ms)



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