Datasheet

UG-204 Evaluation Board User Guide
Rev. A | Page 4 of 12
TEST RESULTS
T
A
= 25°C.
100
90
80
70
60
50
40
30
10
20
0
0.01 0.1 1 10 100
EFFICIENCY (%)
LOAD (A)
09455-002
V
OUT1
= 3.3V
V
OUT2
= 1.8V
V
OUT1
_1.8V_PWM
V
OUT1
_1.8V_PSM
V
IN
= 12V, FREQUENCY = 600kHz
Figure 2. Efficiency (Measurement Is Made with the Adjacent Channel
Disabled)
0.10
0.08
0.06
0.04
0.02
0
–0.02
–0.04
–0.06
–0.10
–0.08
51015
LINE REGULATION (%)
VIN (V)
09455-003
20
V
OUT1
= 3.3V
V
OUT2
= 1.8V
V
IN
= 12V, f
SW
= 600kHz, AT 5A LOAD
Figure 3. Line Regulation
0.4
0.3
0.2
0.1
–0.3
–0.2
–0.1
0
–0.4
0 2 4 6 8 10 12 14
LOAD REGULATION (%)
LOAD (A)
09455-004
V
IN
= 12V, f
SW
= 600kHz
V
OUT1
= 3.3V
V
OUT2
= 1.8V
Figure 4. Load Regulation
09455-005
CH1 10V
CH3 10V
CH2 20mV
CH4 20mV
M1µs A CH1 12.8V
1
2
3
4
V
OUT2
RIPPLE
SW2
V
OUT1
RIPPLE
SW1
Figure 5. Output Ripple, 14 A Load
09455-006
CH3 5A Ω CH4 20mV M100µs A CH3 10.2A
3
4
7A TO 14A STEP LOAD
V
OUT1
RESPONSE
Figure 6. Step Load Transient, V
OUT1
09455-007
CH3 5A Ω CH4 20mV M100µs A CH3 10.2A
3
4
7A TO 14A STEP LOAD
V
OUT2
RESPONSE
Figure 7. Step Load Transient, V
OUT2