LTC3851A Buck Controller overview

Description

Manufacturer
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Category
DC/DC PWM Controller
Sub-Category
PWM Buck

LTC3851A is a 1 channel, 1 phase sync Buck Controller. The maximum input voltage ranges from 4.00 V to 38.00 V and output current goes up to 25.00 A.

The Controller features adjustable 750 kHz switching frequency which results in a typical inductor size of 0.0 uH and a peak efficiency of %. The LTC3851A is available in 3 package option(s): MS-16 QFN-16 SSOP-16 .

Parameter and features overview

ParameterValueReplacement
Search Filter
Nr. of Channel 1
V-IN min. 4.00 V
V-IN max. 38.00 V
I-OUT? 25.00 A
V-OUT min. 0.80 V
V-OUT max. 5.50 V
V-OUT adjustable
V-OUT programmable
sync/non-sync sync
Frequency typ. 750 kHz
Frequency adj. adjustable
Frequency adj. min. 250 kHz
Frequency adj. max. 750 kHz
ext.clock sync. yes
ext.clock Frequency min. 250 kHz
ext.clock Frequency max. 750 kHz
Softstart
Softstart adjustable
Tracking yes
Power Good (PG)
Enable
Operating min.
Operating max.
Junction min.
Junction max.
thermal shutdown typ.
Inductor size typ.
Automotive AEC-Q100
Light-Load Mode yes
Single/ Multiphase single
Nr. of Phases 1
Peak Efficiency
component count min.
current limit adjustable
Nr.of package options 3
CSP
SOT
MSOP MS-16
QFN/DFN QFN-16
SO/SOIC
SOP SSOP-16
DIP

LTC3851A Datasheet

Link to the most up-to-date LTC3851A datasheet and the product page for EVM, tools and support information.

LTC3851A

LTC3851A inventory, samples and price

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Available Distributors with stock: 0

no online Distributor with LTC3851A stock available

Available Distributors with stock: 8

Arrow Electronics

ProductStockPriceBuy
LTC3851AIUD#TRPBF 925
1002.46 $
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LTC3851AIMSE-1#PBF 592
1002.36 $
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LTC3851AEGN#PBF 162
1002.08 $
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LTC3851AIUD-1#PBF 100
1002.36 $
14.46 $
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LTC3851AIUD#TRPBF 0
1002.46 $
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LTC3851AMPMSE#TRPBF 0
1006.52 $
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LTC3851AEUD-1#PBF 0
1002.08 $
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LTC3851AHMSE#PBF 0
1002.72 $
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LTC3851AEMSE-1#PBF 0
1002.08 $
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LTC3851AIMSE-1#TRPBF 0
1002.46 $
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LTC3851AMPMSE#PBF 0
1006.42 $
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LTC3851AEMSE-1#TRPBF 0
1002.18 $
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LTC3851AHMSE#TRPBF 0
1002.82 $
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LTC3851AIUD#TRA1PBF 0 Buy Now
LTC3851AIUD#PBF 0
1002.36 $
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Digi-Key

ProductStockPriceBuy
LTC3851AEMSE-1#PBF 2906
5001.88 €
2501.92 €
1002.02 €
252.44 €
13.68 €
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LTC3851AEMSE#TRPBF 1579
5002.00 €
2502.05 €
1002.16 €
252.91 €
13.93 €
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LTC3851AEMSE#TRPBF 1579
5002.00 €
2502.05 €
1002.16 €
252.91 €
13.93 €
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LTC3851AEMSE#PBF 1221
50001.80 €
5001.88 €
2501.92 €
1002.02 €
252.44 €
13.68 €
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LTC3851AIUD-1#PBF 1030
5002.13 €
2502.18 €
1002.30 €
252.78 €
14.18 €
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LTC3851AEUD#PBF 744
50001.80 €
5001.88 €
2501.92 €
1002.02 €
252.44 €
13.68 €
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LTC3851AEUD-1#PBF 393
50001.80 €
5001.88 €
2501.92 €
1002.02 €
252.44 €
13.68 €
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LTC3851AHMSE#PBF 266
5002.47 €
2502.52 €
1002.66 €
253.21 €
14.84 €
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LTC3851AIMSE#PBF 256
5002.13 €
2502.18 €
1002.30 €
252.78 €
14.18 €
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DC1432A-A 4
189.12 €
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DC1432A-B 2
189.12 €
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LTC3851AEMSE#TRPBF 0
25001.95 €
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LTC3851AEGN#PBF 0
5001.88 €
2501.92 €
1002.02 €
252.44 €
13.68 €
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LTC3851AEMSE-1#TRPBF 0
25001.95 €
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LTC3851AEMSE-1#TRPBF 0
5002.00 €
2502.05 €
1002.16 €
13.93 €
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Verical

ProductStockPriceBuy
LTC3851AIMSE-1#PBF 592
1002.36 $
34.46 $
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LTC3851AIMSE#PBF 240
1002.36 $
32.77 $
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LTC3851AEGN#PBF 162
1002.08 $
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LTC3851AIUD-1#PBF 100
1002.54 $
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Mouser Electronics

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LTC3851AEMSE-1#PBF 663
14.13 $
252.73 $
1002.26 $
2502.15 $
5002.10 $
10002.02 $
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LTC3851AEGN#PBF 322
14.13 $
252.73 $
1002.26 $
2502.15 $
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LTC3851AEUD#PBF 384
14.13 $
252.73 $
1002.26 $
2502.15 $
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LTC3851AIMSE#PBF 296
14.69 $
253.11 $
1002.57 $
2502.44 $
5002.38 $
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LTC3851AIMSE-1#PBF 280
14.69 $
253.11 $
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LTC3851AHMSE#PBF 239
15.42 $
253.60 $
1002.97 $
2502.82 $
5002.76 $
10002.65 $
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LTC3851AMPMSE-1#PBF 82
112.81 $
258.51 $
1007.03 $
2506.68 $
5006.53 $
10006.28 $
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LTC3851AEMSE#PBF 133
14.13 $
252.73 $
1002.26 $
2502.15 $
5002.10 $
10002.02 $
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LTC3851AEUD-1#PBF 0
14.13 $
252.73 $
1002.26 $
2502.15 $
5002.10 $
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LTC3851AIUD#PBF 0
14.69 $
253.11 $
1002.57 $
2502.44 $
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10002.29 $
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LTC3851AIUD-1#PBF 0
14.69 $
253.11 $
1002.57 $
2502.44 $
5002.38 $
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LTC3851AEUD-1#TRPBF 0
25002.09 $
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LTC3851AHMSE-1#PBF 0
2592.82 $
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LTC3851AIGN#PBF 0
3002.44 $
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LTC3851AMPMSE#PBF 0
1117.03 $
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Quest Components

ProductStockPriceBuy
LTC3851AEMSE-1#TRPBF 1419
8782.09 $
2032.28 $
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LTC3851AIMSE-1#3GFPBF 3225
15161.89 $
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LTC3851AIMSE-1#3GFPBF 3225
15161.89 $
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Chip 1 Exchange

ProductStockPriceBuy
LTC3851AIUD#TRPBF 8

Chip1Stop

ProductStockPriceBuy
LTC3851AIMSE-1#PBF 325
1002.68 $
502.88 $
103.48 $
15.16 $
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RS Components

ProductStockPriceBuy
LTC3851AEMSE#PBF 78
182.70 GBP
22.92 GBP
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LTC3851AEMSE#PBF 31
182.70 GBP
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Available Distributors without stock: 1

Richardson RFPD

ProductStockPriceBuy
LTC3851AEUD-1#TRPBF 0
25002.25 $
50002.17 $
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LTC3851AEMSE#TRPBF 0
25002.25 $
50002.17 $
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LTC3851AEMSE-1#PBF 0
3332.30 $
5002.23 $
10002.17 $
50002.09 $
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LTC3851AEGN#PBF 0
3002.30 $
5002.23 $
10002.17 $
50002.09 $
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LTC3851AIMSE-1#PBF 0
2962.61 $
5002.54 $
10002.47 $
50002.38 $
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LTC3851AIUD-1#TRPBF 0
25002.55 $
50002.46 $
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LTC3851AEGN#TRPBF 0
25002.25 $
50002.17 $
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LTC3851AHMSE-1#PBF 0
2593.02 $
5002.94 $
10002.86 $
50002.75 $
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LTC3851AIUD-1#PBF 0
2422.61 $
5002.54 $
10002.47 $
50002.38 $
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LTC3851AEMSE#PBF 0
3332.30 $
5002.23 $
10002.17 $
50002.09 $
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LTC3851AIGN#PBF 0
3002.61 $
5002.54 $
10002.47 $
50002.38 $
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LTC3851AMPMSE#PBF 0
1117.13 $
5006.94 $
10006.75 $
50006.50 $
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LTC3851AMPMSE#TRPBF 0
25006.81 $
50006.56 $
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LTC3851AMPMSE-1#PBF 0
1117.13 $
5006.94 $
10006.75 $
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LTC3851AHMSE#TRPBF 0
25002.94 $
50002.83 $
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Table with equivalents and alternatives

The following Buck Controller are similar to LTC3851A. Or, compare LTC3851A side-by-side with other Buck Controller via the Comparison function.

Variation Compare Product Manufacturer Package
0% LTC3851 LTC3851 product overviewLTC3851 product overview Linear Technology MS-16, QFN-16, SSOP-16

Inductor suggestions

Below you can find matching inductors from Wuerth Elektronik calculated on the maximum parameters of LTC3851A.

V-IN max. 38 V, I-OUT 25 A, V-OUT min. 0.8 V, Frequency typ. 750 kHz
Order Code Spec L (µH) IR (A) ISAT (A) RDC (mΩ) L x W x H (mm)
744302010 0.1 30.0 45.0 0.24 6.95 x 6.8 x 4.7
744302015 0.2 30.0 32.0 0.24 6.95 x 6.8 x 4.7
744303012 0.1 31.0 55.0 0.33 10 x 6.8 x 5
744303015 0.2 31.0 42.0 0.33 10 x 6.8 x 5
744304010 0.1 26.0 52.0 0.17 11.5 x 11.8 x 4
744304016 0.2 26.0 32.0 0.17 11.5 x 11.8 x 4
744307012 0.1 29.0 48.0 0.33 7.4 x 7.2 x 7.2
744307016 0.2 29.0 41.0 0.33 7.4 x 7.2 x 7.2
744308015 0.2 27.0 58.0 0.37 10.1 x 7 x 7
7443081018 0.2 38.0 60.0 0.29 9.4 x 6.2 x 8.1
744325016 0.2 25.0 58.0 0.51 10.5 x 10.2 x 5
744355215 0.2 25.0 60.0 0.58 10.5 x 10.2 x 4.2
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