3
dc1632af
DEMO MANUAL DC1632A
QUICK START PROCEDURE
Figure 2. Efficiency Curves for the DC1632A in FCM
LTC3839 1.5V/40A Converter FCM, f
SW
= 300kHz
75
80
85
90
95
0 5 10 15 20 25 30 35 40 45
EFFICIENCY (%)
LOAD CURRENT (A)
Qtop = Infineon BSC050NE2LS
Qbottom = Infineon BSC010NE2LS
L = Coiltronics FP1308R3-R44-R
(0.44μH, DCR = 0.18m Ω±20%)
R
SENSE
= 2mΩ
V
IN
= 12V
V
IN
= 5V
0
10
20
30
40
50
60
70
80
90
100
0.01 0.10 1.00 10.00 100.00
EFFICIENCY (%)
LOAD CURRENT (A)
FCM
DCM
Qtop = Infineon BSC050NE2LS
Qbottom = Infineon BSC010NE2LS
L = Coiltronics FP1308R3-R44-R
(0.44μH, DCR = 0.18m Ω±20%)
R
SENSE
= 2mΩ
Figure 3. Efficiency Curves for the DC1632A in FCM and DCM
LTC3839 1.5V/40A Converter FCM & DCM, V
IN
= 12V, f
SW
= 300kHz
Figure 4. Load Step Response of the DC1632A at V
IN
= 12V. C
OUT
= 4
×
Sanyo
2R5TPE330M9 || 2
×
100μF X5R 6.3V 1206, L1, 2 = 0.44μH, f
SW
=300kHz
40A
20A
20μsec/DIV
LOAD STEP
10A/DIV
1.5V(AC)
50mV/DIV
106mV
P-P
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