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ADP1871 Datasheet(PDF) 32 Page - Analog Devices

Part # ADP1871
Description  Synchronous Buck Controller with Constant On-Time and Valley Current Mode
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

ADP1871 Datasheet(HTML) 32 Page - Analog Devices

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ADP1870/ADP1871
Rev. 0 | Page 32 of 44
Marking Code
SAP Model
ADP1870
ADP1871
VOUT
(V)
VIN
(V)
CIN
(μF)
COUT
(μF)
L1
(μH)
RC
(kΩ)
CCOMP
(pF)
CPAR
(pF)
RTOP
(kΩ)
LDY
LDN
5
16.5
3 × 109
3 × 476
1.0
34
268
27
110.0
LDY
LDN
7
16.5
3 × 109
222 + 476
1.0
34
228
23
160.0
1 See the
section and
.
Inductor Selection
Table 11
Table 11. Recommended Inductors
2 22 μF Murata 25 V, X7R, 1210 GRM32ER71E226KE15L (3.2 mm × 2.5 mm × 2.5 mm).
3 560 μF Panasonic (SP-series) 2 V, 7 mΩ, 3.7 A EEFUE0D561LR (4.3 mm × 7.3 mm × 4.2 mm).
4 270 μF Panasonic (SP-series) 4 V, 7 mΩ, 3.7 A EEFUE0G271LR (4.3 mm × 7.3 mm × 4.2 mm).
5 330 μF Panasonic (SP-series) 4 V, 12 mΩ, 3.3 A EEFUE0G331R (4.3 mm × 7.3 mm × 4.2 mm).
6 47 μF Murata 16 V, X5R, 1210 GRM32ER61C476KE15L (3.2 mm × 2.5 mm × 2.5 mm).
7 150 μF Panasonic (SP-series) 6.3 V, 10 mΩ, 3.5 A EEFUE0J151XR (4.3 mm × 7.3 mm × 4.2 mm).
8 180 μF Panasonic (SP-series) 4 V, 10 mΩ, 3.5 A EEFUE0G181XR (4.3 mm × 7.3 mm × 4.2 mm).
9 10 μF TDK 25 V, X7R, 1210 C3225X7R1E106M.
L (μH)
DCR (mΩ)
ISAT (A)
Dimension (mm)
Manufacturer
Model Number
0.12
0.33
55
10.2 × 7
Würth Elektronik
744303012
0.22
0.33
30
10.2 × 7
Würth Elektronik
744303022
0.47
0.67
50
13.2 × 12.8
Würth Elektronik
744355147
0.72
1.3
35
10.5 × 10.2
Würth Elektronik
744325072
0.9
1.6
28
13 × 12.8
Würth Elektronik
744355090
1.2
1.8
25
10.5 × 10.2
Würth Elektronik
744325120
1.0
3.3
20
10.5 × 10.2
Würth Elektronik
7443552100
1.4
3.2
24
14 × 12.8
Würth Elektronik
744318180
2.0
2.6
22
13.2 × 10.8
Würth Elektronik
7443551200
0.8
2.5
16.5
12.5 × 12.5
AIC Technology
CEP125U-R80
Table 12. Recommended MOSFETs
VGS = 4.5 V
RON
(mΩ)
ID
(A)
VDS
(V)
CIN
(nF)
QTOTAL
(nC)
Package
Manufacturer
Model Number
Upper-Side MOSFET
(Q1/Q2)
5.4
47
30
3.2
20
PG-TDSON8
Infineon
BSC042N03MS G
10.2
53
30
1.6
10
PG-TDSON8
Infineon
BSC080N03MS G
6.0
19
30
35
SO-8
Vishay
Si4842DY
9
14
30
2.4
25
SO-8
International Rectifier
IRF7811
Lower-Side MOSFET
(Q3/Q4)
5.4
47
30
3.2
20
PG-TDSON8
Infineon
BSC042N03MS G
10.2
82
30
1.6
10
PG-TDSON8
Infineon
BSC080N03MS G
6.0
19
30
35
SO-8
Vishay
Si4842DY


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