Linear Technology DC1626A, Demo Manual

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4
dc1626afa
DEMO MANUAL DC1626A
QUICK START PROCEDURE
LOAD CURRENT (A)
BOTH RAILS:
QTOP = RJK0305DPB
QBOTTOM = RJK0330DPB
L = VISHAY IHLP4040DZ-01 0.56μH
DCR = 1.7mΩ TYP, 1.8mΩ MAX
0
EFFICIENCY (%)
95
90
80
85
75
10 5 15
dc1626a F02
20
1.5V
1.2V
LOAD CURRENT (A)
BOTH RAILS:
QTOP = RJK0305DPB
QBOTTOM = RJK0330DPB
L = WURTH 7443330068 0.68μH
DCR = 1.35mΩ ±10%
R
SENSE
= 2.5mΩ
0
EFFICIENCY (%)
95
90
80
85
75
10 5 15
dc1626a F04
20
1.5V
1.2V
LOAD CURRENT (A)
BOTH RAILS:
QTOP = RJK0305DPB
QBOTTOM = RJK0330DPB
L = VISHAY IHLP4040DZ-01 0.56μH
DCR = 1.7mΩ TYP, 1.8mΩ MAX
0.01 1 0.1 10
dc1626a F03
100
EFFICIENCY (%)
100
10
90
70
50
30
80
60
40
20
0
1.2V
1.5V
FCM
DCM
LOAD CURRENT (A)
BOTH RAILS:
QTOP = RJK0305DPB
QBOTTOM = RJK0330DPB
L = WURTH 7443330068 0.68μH
DCR = 1.35mΩ ±10%
R
SENSE
= 2.5mΩ
0.01 1 0.1 10
dc1626a F05
100
EFFICIENCY (%)
100
10
90
70
50
30
80
60
40
20
0
1.2V
1.5V
FCM
DCM
Figure 2. Efficiency Curves for the DC1626A-A
(DCR Sense) in FCM
Figure 4. Efficiency Curves for the DC1626A-B
(R
SENSE
) in FCM
Figure 3. Efficiency Curves for the DC1626A-A
(DCR Sense) in FCM and DCM.
Figure 5. Efficiency Curves for the DC1626A-B
(R
SENSE
) in FCM and DCM