Datasheet

Data Sheet ADP5050
Rev. 0 | Page 17 of 60
–100
–90
–80
–70
–60
–50
–40
–30
–20
–10
0
10 100 1k 10k 100k 1M 10M
PSRR (dB)
FREQUENCY (Hz)
PVIN5 = 4.0V; I
OUT
= 1mA
PVIN5 = 3.6V, I
OUT
= 1mA
PVIN5 = 4.0V, I
OUT
= 100mA
PVIN5 = 3.6V, I
OUT
= 100mA
PVIN5 = 4.0V, I
OUT
= 200mA
PVIN5 = 3.6V, I
OUT
= 200mA
10899-027
Figure 29. Channel 5 (LDO Regulator) PSRR over Various Loads
and Dropout Voltages, V
OUT
= 3.3 V, C
OUT
= 1 µF
CH1 5.00V CH2 10.0mV
B
W
M1.00µs A CH1 7.40V
2
1
V
OUT
SW
10899-028
Figure 30. Steady State Waveform at Heavy Load, V
IN
= 12 V, V
OUT
= 3.3 V,
I
OUT
= 3 A, f
SW
= 600 kHz, L = 4.7 µH, C
OUT
= 47 µF × 2, FPWM Mode
10899-029
CH1 5.00V CH2 50.0mV
B
W
M100µs A CH1 11.0mV
2
1
V
OUT
SW
Figure 31. Steady State Waveform at Light Load, V
IN
= 12 V, V
OUT
= 3.3 V,
I
OUT
= 30 mA, f
SW
= 600 kHz, L = 4.7 µH, C
OUT
= 47 µF × 2,
Automatic PWM/PSM Mode
CH1 50.0mV
B
W
CH4 2.00A Ω
M100µs A CH1 –22.0mV
1
4
V
OUT
I
OUT
10899-030
Figure 32. Channel 1/Channel 2 Load Transient, 1 A to 4 A, V
IN
= 12 V,
V
OUT
= 3.3 V, f
SW
= 600 kHz, L = 2.2 µH, C
OUT
= 47 µF × 2
CH3 2.00A Ω
B
W
CH4 2.00A Ω
B
W
CH2 100mV
B
W
M100µs A CH2 –56.0mV
2
4
V
OUT
I
OUT2
I
OUT1
10899-031
Figure 33. Load Transient, Channel 1/Channel 2 Parallel Output, 0 A to 6 A,
V
IN
= 12 V, V
OUT
= 3.3 V, f
SW
= 600 kHz, L = 4.7 µH, C
OUT
= 47 µF × 4
CH1 500mV
B
W
CH2 5.00V
CH3 5.00V
B
W
CH4 2.00A Ω
M1.00ms A CH1 650mV
1
3
2
4
V
OUT
I
OUT
EN
PWRGD
10899-032
Figure 34. Channel 1/Channel 2 Soft Start with 4 A Resistance Load,
V
IN
= 12 V, V
OUT
= 1.2 V, f
SW
= 600 kHz, L = 1 µH, C
OUT
= 47 µF × 2