Datasheet

EVAL-ADP1621
Rev. 0 | Page 6 of 12
TEST WAVEFORMS
40
50
60
70
80
90
100
EFFICIENCY (%)
LOAD CURRENT (µA)
0 0.5 1.0 1.5 2.0 2.5
T
A
= 25°C
V
IN
= 3.3V
V
OUT
= 5V
f
SW
= 600kHz
06358-002
Figure 2. Efficiency vs. Load Current
06358-003
CH1 50.0mV CH2 5.00V M 2.00µs A CH2 500mV
B
W
Δ: 57.0mV
@: 23.0mV
2
1
V
IN
= 3.3V
V
OUT
= 5V
2A LOAD
OUTPUT RIPPLE
GATE
T
Figure 3. Output Voltage Ripple, 2 A Load
06358-004
4
2
CH3 5.00V CH4 1.00AΩ
3
0.5A LOAD
CH2 5.00V M 1.00µs A CH3 3.10V
GATE
DRAIN VOLTAGE
INDUCTOR CURRENT
T
Figure 4. CCM Switching Waveform, 0.5 A Load
06358-005
CH1 50.0mV CH2 5.00V M 2.00µs A CH2 500mV
B
W
2
1
Δ
: 33.0mV
@: –21.0mV
V
IN
= 3.3V
V
OUT
= 5V
1A LOAD
T
OUTPUT RIPPLE
GATE
Figure 5. Output Voltage Ripple, 1 A Load
06358-006
CH2 5.00V M 1.00µs A CH2 3.60V
2
4
CH3 5.00V CH4 1.00AΩ
3
DRAIN VOLTAGE
GATE
INDUCTOR CURRENT
0.1A LOAD
T
Figure 6. DCM Switching Waveform, 0.1 A Load
06358-007
CH2 5.00V M 1.00µs A CH3 6.00V
2
4
T
CH3 5.00V CH4 2.00AΩ
3
DRAIN VOLTAGE
GATE
DRAIN CURRENT
1A LOAD
Figure 7. CCM Switching Waveform, 1 A Load