Datasheet

ADP2119/ADP2120 Data Sheet
Rev. A | 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
V
OUT
(AC)
SW
I
L
08716-034
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
V
OUT
(AC)
SW
I
L
08716-035
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
V
OUT
(AC)
SW
I
L
08716-036
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
MAGNITUDE (dB)
PHASE (Degrees)
FREQUENCY (Hz)
CROSS FREQUENCY: 124kHz
PHASE MARGIN: 46°
08716-037
Figure 37. ADP2119 Bode Plot at V
IN
= 5 V, V
OUT
= 1.0 V, I
O
= 2 A,
L = 1 µH, C
OUT
= 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
MAGNITUDE (dB)
PHASE (Degrees)
FREQUENCY (Hz)
CROSS FREQUENCY: 105kHz
PHASE MARGIN: 47°
08716-038
Figure 38. ADP2119 Bode Plot at V
IN
= 5 V, V
OUT
= 1.2 V, I
O
= 2 A,
L = 1.5 µH, C
OUT
= 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
MAGNITUDE (dB)
PHASE (Degrees)
FREQUENCY (Hz)
CROSS FREQUENCY: 112kHz
PHASE MARGIN: 48°
08716-039
Figure 39. ADP2119 Bode Plot at V
IN
= 5 V, V
OUT
= 1.5 V, I
O
= 2 A,
L = 1.5 µH, C
OUT
= 22 µF +10 µF