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DC1626A-A

P1-P3P4-P6P7-P9P10-P10
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
10515
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
10515
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 10.1 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 10.1 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
5
dc1626afa
DEMO MANUAL DC1626A
QUICK START PROCEDURE
dc1626a F06
LOAD STEP
5A/DIV
1.2V
O(AC)
50mV/DIV
15A
5A
109mV
dc1626a F08
LOAD STEP
5A/DIV
1.2V
O(AC)
50mV/DIV
15A
5A
114mV
dc1626a F07
LOAD STEP
5A/DIV
1.5V
O(AC)
50mV/DIV
15A
5A
108mV
dc1626a F09
LOAD STEP
5A/DIV
1.5V
O(AC)
50mV/DIV
15A
5A
108mV
Figure 6. Load Step Response of the 1.2V Rail on the DC1626A-A
(DCR Sense) at V
IN
= 12V. C
OUT
= 2× Sanyo 2R5TPE330M9 ||
2× 100μF X5R 6.3V 1206, L = 0.56μH, f
SW
= 300kHz
Figure 8. Load Step Response of the 1.2V Rail on the DC1626A-B
(R
SENSE
) At V
IN
= 12V. C
OUT
= 2× Sanyo 2R5TPE330M9 || 2× 100μF
X5R 6.3V 1206, L = 0.68μH, f
SW
= 300kHz
Figure 7. Load Step Response of the 1.5V Rail on the DC1626A-A
(DCR Sense) at V
IN
= 12V. C
OUT
= 2× Sanyo 2R5TPE330M9 ||
2× 100μF X5R 6.3V 1206, L = 0.56μH, f
SW
= 300kHz
Figure 9. Load Step Response of the 1.5V Rail on the DC1626A-B
(R
SENSE
) at V
IN
= 12V. C
OUT
= 2× Sanyo 2R5TPE330M9 || 2× 100μF
X5R 6.3V 1206, L = 0.68μH, f
SW
= 300kHz
6
dc1626afa
DEMO MANUAL DC1626A
1626A-A (DCR Sense)
ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER
Required Circuit Components
1 1 C12 CAP, X7R 330pF 50V 0603 AVX 06035C331KAT2A
2 5 C3, C16, C4, C10, C13 CAP, X5R 0.1μF 50V 0603 AVX 06035D104KAT2A 
3 2 C5, C14 CAP, X5R 0.01μF 25V 0603 AAC 0603D103KAT2A
4 2 C6, C11 CAP, NPO 47pF 16V 0603 AVX 0603YA470KAT4A
5 1 C7 CAP, NPO 220pF 25V 0603 AVX 06033A221KAT2A
6 1 C8 CAP, X5R 4.7μF 16V 0805 AVX 0805YD475KAT2A
7 2 C9, C18 CAP, X5R 1μF 16V 0603 AVX 0603YD105KAT2A
8 2 CIN1, CIN2 CAP, 100μF 35V SIZE-F SUNCON 35HVH100M
9 3 CIN3, CIN4, CIN5 CAP, X5R 10μF 35V 1210 TAIYO YUDEN GMK325BJ106MN-T
10 4 COUT1, COUT2, COUT5, COUT6 CAP, 330μF 2.5V SIZE 7343 SANYO 2R5TPE330M9
11 4 COUT3, COUT4, COUT7, COUT8 CAP, X5R 100μF 6.3V 1206 MURATA GRM31CR60J107ME39L
12 2 D1, D2 DIODE, SCHOTTKY SOD-323 CENTRAL SEMI. CMDSH-4ETR
13 2 L1, L2 IND, 0.56μH VISHAY IHLP4040DZERR56M01
14 2 Q1, Q3 MOSFET, N-CHANNEL LFPAK RENESAS RJK0305DPB-00-J0
15 2 Q2, Q4 MOSFET, N-CHANNEL LFPAK RENESAS RJK0330DPB-00-J0
16 2 R12, R38 RES, 100k 1% 0603 VISHAY CRCW0603100KFKEA
17 1 R13 RES, 15k 1% 0603 VISHAY CRCW060315K0FKEA
18 4 R17, R23, R40, R46 RES, 10k 1% 0603 VISHAY CRCW060310K0FKEA
19 2 R18, R32 RES, 4.02k 1% 0603 VISHAY CRCW06034K02FKEA
20 2 R19, R34 RES, 11k 1% 0603 VISHAY CRCW06011K0FKEA
21 1 R21 RES, 40.2k 1%, 0603 VISHAY CRCW060340K2FKEA
22 2 R27, R25 RES, 2.2Ω 1% 0603 VISHAY CRCW06032R20FKEA
23 1 R28 RES, 137k 1% 0603 VISHAY CRCW0603137KFKEA
24 1 R31 RES, 17.4k 1% 0603 VISHAY CRCW06017K4FKEA
25 2 R42, R43 RES, 10Ω 1% 0603 VISHAY CRCW060310R0FKEA
26 9 R8, R11, R16, R35, R39, R48, R55, R20, R36,
R30, R26
RES, 0Ω 0603 VISHAY CRCW06030000Z0EA
27 2 RS1, RS2 RES, 0.000Ω 1W 1% 2512 TEPRO RN5326
28 1 U1 LTC3838 38-LEAD TSSOP LINEAR TECH. LTC3838EFE
Additional Circuit Components
1 0 C1, C2, C15, C17 CAP, 0603 OPTIONAL
2 0 CIN6-CIN8 CAP, 1210 OPTIONAL
3 0 COUT13-COUT16 CAP, 7343 OPTIONAL
4 0 Q5-Q8 MOSFET, N-CHANNEL LFPAK OPTIONAL
5 0 R1, R4, R7, R9, R47, R14, R15, R24, R29, R41,
R45, R3, R6, R10, R37, R44, R49, R50
RES, 0603 OPTIONAL
6 2 Q9, Q10 MOSFET, N-CHANNEL DPAK VISHAY SUD50N03-12P-E3
7 2 R51, R52 RES, 10k 1% 0603 VISHAY CRCW060310K0FKEA
8 2 R53, R54 RES, 0.01Ω 1/2W 1% 2010 VISHAY WSL2010R0100FEA
PARTS LIST
P1-P3P4-P6P7-P9P10-P10

DC1626A-A

Mfr. #:
Buy DC1626A-A
Manufacturer:
Analog Devices Inc.
Description:
Power Management IC Development Tools LTC3838EFE Demo Board w/ DCR Sense ? 4.5
Lifecycle:
New from this manufacturer.
Delivery:
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