Linear Technology DC1668A-C Demo Manual page 4

DEMO MANUAL DC1668A-C
QUICK START PROCEDURE
95
90
85
80
75
70
0 10
LOAD CURRENT (A)
Figure 2. Measured Efficiency at 12V
V
OUT
100mV/DIV
I STEP
OUT
20A/DIV
Figure 4. Measured Load Step Response
4
3.3V
OUT
2.5V
OUT
1.8V
OUT
1.5V
OUT
1.2V
OUT
1V
OUT
20 30 40 50
1668ac F02
, 500kHz
IN
V = 1.8V
OUT
I DC = 25A
OUT
I STEP = 25A
OUT
f = 500kHz
SW
Figure 3. Thermal Capture at 12V
No Forced Airflow (Convection). T
V
OUT
20mV/DIV
1668ac F04
Figure 5. Measured Output Voltage Ripple (20MHz BW)
, 1.8V , 50A, 500kHz
IN OUT
= 29°C
A
V = 1.8V
OUT
I = 50A
OUT
f = 500kHz
SW
1668ac F05
dc1668acf