Linear Technology DC1663A Demo Manual page 4

DEMO MANUAL DC1663A
QUICK START PROCEDURE
95
90
85
80
75
70
65
60
0 1 2 3
LOAD CURRENT (A)
Figure 2. Measured Efficiency on Channel 1
(V = 1.5V, f
OUT1 SW
V
OUT1
AC-COUPLED
20MHz BW
100mV/DIV
I
OUT1
0A TO 4A STEP
3.3A/DIV
Figure 4. Measured Channel 1 Load Transient
(V = 12V, V
IN OUT1
4
5V
IN
9V
IN
12V
IN
15V
IN
18V
IN
4 5 6 7 8
1663 F02
= 400kHz, Channel 2 Disabled)
= 1.5V)
1.5V OUTPUT
AC-COUPLED
20MHz BW
50mV/DIV
1.2V OUTPUT
AC-COUPLED
20MHz BW
50mV/DIV
Figure 6. Measured Output Voltage Ripple at 12V Input, 1.5V and
1.2V Output, 8A Per Channel with Standard Demo Circuit Default Setup
95
90
85
80
75
70
65
60
0 1
Figure 3. Measured Efficiency on Channel 2
(V = 1.2V, f
OUT2
V
OUT2
AC-COUPLED
20MHz BW
100mV/DIV
I
OUT2
0A TO 4A STEP
3.3A/DIV
1663 F04
Figure 5. Measured Channel 2 Load Transient
(V = 12V, V
IN
5V
IN
9V
IN
12V
IN
15V
IN
18V
IN
2 3 4 5 6 7 8
LOAD CURRENT (A)
1663 F03
= 400kHz, Channel 1 Disabled)
SW
= 1.2V)
OUT2
1663 F06
1663 F05
dc1663af