Linear Technology DC1596A, Demo Manual

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dc1596afa
DEMO MANUAL DC1596A
QUICK START PROCEDURE
Figure 7. Load Step Response Figure 8. Load Step Response
Figure 9. Load Step Response
LOAD CURRENT (A)
0000.1
EFFICIENCY (%)
60
70
80
1
DC1596A F10
50
40
20
000.1 00.1 0.1
30
100
90
V
IN
= 5V, V
O1
= 1.8V
V
IN
= 12V, V
O1
= 1.8V
V
IN
= 5V, V
O2
= 3.3V
V
IN
= 12V, V
O2
= 3.3V
L1: 2.2µH 1616BZ VISHAY
L2: 4.7µH 1616BZ VISHAY
Burst Mode OPERATION
f
SW
= 2.25MHz
Figure 10. Efficiency
20µs/DIV
V
IN
= 12V
V
OUT2
= 2.5V
400mA LOAD STEP (200mA TO 600mA)
PULSE-SKIPPING MODE, f
SW
= 2.25MHz
DC1596A F07
V
OUT
100mV/DIV
AC-COUPLED
I
OUT
200mA/DIV
20µs/DIV
V
IN
= 12V
V
OUT2
= 3.3V
400mA LOAD STEP (200mA TO 600mA)
PULSE-SKIPPING MODE, f
SW
= 2.25MHz
DC1596A F08
V
OUT
100mV/DIV
AC-COUPLED
I
OUT
200mA/DIV
20µs/DIV
V
IN
= 12V
V
OUT2
= 5V
400mA LOAD STEP (200mA TO 600mA)
PULSE-SKIPPING MODE, f
SW
= 2.25MHz
DC1596A F09
V
OUT
100mV/DIV
AC-COUPLED
I
OUT
200mA/DIV