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ADP2120ACPZ-3.3-R7 数据表(PDF) 12 Page - Analog Devices

部件名 ADP2120ACPZ-3.3-R7
功能描述  2 A/1.25 A, 1.2 MHz, Synchronous, Step-Down DC-to-DC Regulators
PDF  24 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

ADP2120ACPZ-3.3-R7 数据表(HTML) 12 Page - Analog Devices

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ADP2119/ADP2120
Rev. 0 | Page 12 of 24
CH1 20.0mV CH2 5.00V
CH4 500mA
Ω
M4.0µs
A CH4
820mA
T
–40.0ns
1
2
4
T
VOUT (AC)
SW
IL
Figure 34. PFM Mode
CH1 5.0mV CH2 5.00V
CH4 500mA
Ω
M1.0µs
A CH2
4.3V
T
–40.0ns
1
2
4
T
VOUT (AC)
SW
IL
Figure 35. Discontinuous Conduction Mode (DCM)
CH1 5.0mV CH2 5.00V
CH4 1.0A
Ω
M1.0µs
A CH2
4.3V
T
–40.0ns
1
2
4
T
VOUT (AC)
SW
IL
Figure 36. Continuous Conduction Mode (CCM)
80
–80
–64
–48
–32
–16
0
16
32
48
64
200
–200
–160
–120
–80
–40
0
40
80
120
160
1k
10k
100k
1M
FREQUENCY (Hz)
CROSS FREQUENCY: 124kHz
PHASE MARGIN: 46°
Figure 37. ADP2119 Bode Plot at VIN = 5 V, VOUT = 1.0 V, IO = 2 A,
L = 1 μH, COUT = 2 × 22 μF
80
–80
–64
–48
–32
–16
0
16
32
48
64
200
–200
–160
–120
–80
–40
0
40
80
120
160
1k
10k
100k
1M
FREQUENCY (Hz)
CROSS FREQUENCY: 105kHz
PHASE MARGIN: 47°
Figure 38. ADP2119 Bode Plot at VIN = 5 V, VOUT = 1.2 V, IO = 2 A,
L = 1.5 μH, COUT = 2 × 22 μF
80
–80
–64
–48
–32
–16
0
16
32
48
64
200
–200
–160
–120
–80
–40
0
40
80
120
160
1k
10k
100k
1M
FREQUENCY (Hz)
CROSS FREQUENCY: 112kHz
PHASE MARGIN: 48°
Figure 39. ADP2119 Bode Plot at VIN = 5 V, VOUT = 1.5 V, IO = 2 A,
L = 1.5 μH, COUT = 22 μF +10 μF



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