Datasheet
UG-443 ADP1851-EVALZ User Guide
Rev. 0 | Page 4 of 12
TEST RESULTS
T
A
= 25°C.
Figure 2. Efficiency, V
IN
= 12 V, V
OUT
= 1.8 V, f
OSC
= 600 kHz
Figure 3. Line Regulation, V
OUT
= 1.8 V, f
SW
= 600 kHz, 25 A Load
Figure 4. Load Regulation, V
IN
= 12 V, V
OUT
= 1.8 V, f
SW
= 600 kHz
Figure 5. Switching Waveforms, Light Load of 1.5 A,
f
OSC
= 600 kHz, Pulse Skip Enabled, SYNC Low
Figure 6. Switching Waveforms, 25 A Load, f
SYNC
= 600 kHz
Figure 7. V
OUT
Transient Response, 20 A to 10 A Load Step
100
0
0.1 101100
EFFICIENCY (%)
LOAD (A)
10
20
30
40
50
60
70
80
90
PULSE SKIP
FORCED PWM
10909-002
0.08
–0.08
91011 15141312
LINE REGULATION (%)
INPUT VOLTAGE (V)
–0.04
–0.06
–0.02
0
0.02
0.04
0.06
10909-003
0.6
0.4
0.2
–1.4
–0.8
–1.0
–1.2
–0.6
–0.4
–0.2
0 101520525
LOAD REGULATION (%)
LOAD CURRENT (A)
0
10909-004
CH1 5V
B
W
CH3 10V
B
W
CH2 50mV
B
W
M4µs
A CH3 13.4V
1.25GS/s IT 40ps/pt
3
1
2
DH
DL
VOUT_AC
10909-005
CH1 5V
B
W
CH3 20V
B
W
CH2 200mV
B
W
CH4 5V
B
W
M1µs
A CH3 7.2V
1.25GS/s IT 100ps/pt
3
1
2
4
DH
DL
VOUT_AC
SYNC
10909-006
CH2 100mV
B
W
CH4 10A Ω
B
W
M100µs
A CH4 13.4A
50MS/s 20.0ns/pt
2
4
VOUT_AC
LOAD CURRENT
10909-007