LTC3859A Buck Controller overview

Description

Manufacturer
 
Category
Sub-Category

LTC3859A is a 3 channel, 2 phase sync Buck Controller. The maximum input voltage ranges from 4.50 V to 38.00 V and output current goes up to 25.00 A.

The Controller features adjustable 900 kHz switching frequency which results in a typical inductor size of 0.0 uH and a peak efficiency of %. The LTC3859A is available in 2 package option(s): QFN-38 TSSOP-38 .

Parameter and features overview

ParameterValueReplacement
Search Filter
Nr. of Channel 3
V-IN min. 4.50 V
V-IN max. 38.00 V
I-OUT? 25.00 A
V-OUT min. 0.80 V
V-OUT max. 24.00 V
V-OUT adjustable
V-OUT programmable
sync/non-sync sync
Frequency typ. 900 kHz
Frequency adj. adjustable
Frequency adj. min. 50 kHz
Frequency adj. max. 900 kHz
ext.clock sync. yes
ext.clock Frequency min. 75 kHz
ext.clock Frequency max. 850 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 multi
Nr. of Phases 2
Peak Efficiency
component count min.
current limit adjustable
Nr.of package options 2
CSP
SOT
MSOP
QFN/DFN QFN-38
SO/SOIC
SOP TSSOP-38
DIP

LTC3859A Datasheet

Link to the most up-to-date LTC3859A datasheet and the product page for EVM, tools and support information.

LTC3859A

LTC3859A inventory, samples and price

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Available Distributors with stock: 2

Digi-Key (11)

ProductStockPriceBuy
LTC3859ALIUHF#PBF168
110.64 USD
257.11 USD
1006.05 USD
Buy Now
LTC3859AHUHF#PBF167
111.28 USD
257.55 USD
1006.42 USD
Buy Now
LTC3859AEFE#PBF40
19.87 USD
256.60 USD
1005.61 USD
Buy Now
LTC3859ALHUHF#PBF54
111.28 USD
257.55 USD
Buy Now
LTC3859AMPUHF#PBF52
122.96 USD
2519.21 USD
Buy Now
LTC3859ALEUHF#PBF20
19.48 USD
256.34 USD
1005.39 USD
Buy Now
LTC3859ALHFE#PBF13
111.66 USD
257.79 USD
1006.63 USD
Buy Now
LTC3859AEUHF#PBF0
1565.39 USD
Buy Now
LTC3859AEUHF#TRPBF0
25005.49 USD
Buy Now
LTC3859ALEUHF#TRPBF0
25005.49 USD
Buy Now
LTC3859AEFE#TRPBF0
20005.71 USD
Buy Now
LTC3859ALEFE#TRPBF0
20005.71 USD
Buy Now
LTC3859AIUHF#TRPBF0
25006.15 USD
Buy Now
LTC3859ALIUHF#TRPBF0
25006.15 USD
Buy Now
LTC3859AIFE#TRPBF0
20006.36 USD
Buy Now
LTC3859ALIFE#TRPBF0
20006.36 USD
Buy Now
LTC3859AHUHF#TRPBF0
25006.52 USD
Buy Now
LTC3859ALHUHF#TRPBF0
25006.52 USD
Buy Now
LTC3859AHFE#PBF0
1506.63 USD
Buy Now
LTC3859AHFE#TRPBF0
20006.73 USD
Buy Now
LTC3859ALHFE#TRPBF0
20006.73 USD
Buy Now
LTC3859ALEFE#PBF12
19.87 USD
Buy Now
LTC3859AIUHF#PBF17
110.64 USD
Buy Now
LTC3859AIFE#PBF25
111.02 USD
257.37 USD
Buy Now
LTC3859ALIFE#PBF15
111.02 USD
Buy Now

Newark Electronics (3)

ProductStockPriceBuy
LTC3859ALEUHF#PBF52
12.34 USD
252.34 USD
1002.34 USD
Buy Now
LTC3859ALIFE#PBF50
12.67 USD
1002.67 USD
Buy Now
LTC3859ALIUHF#PBF52
12.59 USD
252.59 USD
1002.59 USD
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Available Distributors without stock: 2

Mouser Electronics (0)

ProductStockPriceBuy
LTC3859ALEUHF#TRPBF0
25005.51 USD
Buy Now
LTC3859ALIUHF#TRPBF0
25006.17 USD
Buy Now
LTC3859ALEUHF#PBF0
1565.40 USD
Buy Now
LTC3859AEUHF#PBF0
1565.40 USD
Buy Now
LTC3859ALEFE#PBF0
1505.63 USD
Buy Now
LTC3859AEFE#PBF0
1505.63 USD
Buy Now
LTC3859AMPFE#PBF0
5019.95 USD
10016.96 USD
Buy Now
LTC3859ALMPFE#PBF0
5019.95 USD
10016.96 USD
Buy Now
LTC3859ALMPUHF#PBF0
5219.27 USD
10416.37 USD
Buy Now
LTC3859AMPUHF#PBF0
5219.27 USD
10416.37 USD
Buy Now
LTC3859ALIFE#PBF0
1506.28 USD
Buy Now
LTC3859AIFE#PBF0
1506.28 USD
Buy Now
LTC3859ALIUHF#PBF0
1566.07 USD
Buy Now
LTC3859AIUHF#PBF0
1566.07 USD
Buy Now
LTC3859AHFE#PBF0
1506.66 USD
Buy Now
LTC3859ALHFE#PBF0
1506.66 USD
Buy Now
LTC3859ALHUHF#PBF0
1566.44 USD
Buy Now
LTC3859AHUHF#PBF0
1566.44 USD
Buy Now
LTC3859AEFE#TRPBF0
20005.72 USD
Buy Now
LTC3859ALEFE#TRPBF0
20005.72 USD
Buy Now
LTC3859ALIFE#TRPBF0
20006.38 USD
Buy Now
LTC3859AIFE#TRPBF0
20006.38 USD
Buy Now
LTC3859AHFE#TRPBF0
20006.75 USD
Buy Now
LTC3859ALHFE#TRPBF0
20006.75 USD
Buy Now
LTC3859AEUHF#TRPBF0
25005.51 USD
Buy Now
LTC3859AIUHF#TRPBF0
25006.17 USD
Buy Now
LTC3859ALHUHF#TRPBF0
25006.54 USD
Buy Now
LTC3859AHUHF#TRPBF0
25006.54 USD
Buy Now
LTC3859AMPFE#TRPBF0
200017.02 USD
Buy Now
LTC3859ALMPFE#TRPBF0
200017.02 USD
Buy Now
LTC3859ALMPUHF#TRPBF0
250016.43 USD
Buy Now
LTC3859AMPUHF#TRPBF0
250016.43 USD
Buy Now

Rutronik (0)

ProductStockPriceBuy
nnBuy Now

Available Distributors with stock: 5

Arrow Electronics

ProductStockPriceBuy
LTC3859ALEUHF#PBF 52
1005.28 $
16.22 $
Buy Now
LTC3859ALIFE#PBF 50
1006.14 $
17.23 $
Buy Now

Digi-Key

ProductStockPriceBuy
LTC3859ALIUHF#PBF 168
1005.16 €
256.07 €
19.08 €
Buy Now
LTC3859AHUHF#PBF 167
1005.48 €
256.44 €
19.63 €
Buy Now
LTC3859ALHUHF#PBF 54
256.44 €
19.63 €
Buy Now
LTC3859AMPUHF#PBF 52
2516.39 €
119.60 €
Buy Now
LTC3859AEFE#PBF 40
1004.79 €
255.63 €
18.42 €
Buy Now
LTC3859ALEUHF#PBF 20
1004.60 €
255.41 €
18.09 €
Buy Now
LTC3859ALHFE#PBF 13
1005.66 €
256.65 €
19.95 €
Buy Now
LTC3859AEUHF#PBF 0
1564.60 €
Buy Now
LTC3859AEUHF#TRPBF 0
25004.68 €
Buy Now
LTC3859ALEUHF#TRPBF 0
25004.68 €
Buy Now
LTC3859AEFE#TRPBF 0
20004.88 €
Buy Now
LTC3859ALEFE#TRPBF 0
20004.88 €
Buy Now
LTC3859AIUHF#TRPBF 0
25005.25 €
Buy Now
LTC3859ALIUHF#TRPBF 0
25005.25 €
Buy Now
LTC3859AIFE#TRPBF 0
20005.43 €
Buy Now
show stock=0hide stock=0

Verical

ProductStockPriceBuy
LTC3859ALEUHF#PBF 52
76.22 $
Buy Now
LTC3859ALIFE#PBF 50
67.23 $
Buy Now

Newark element14

ProductStockPriceBuy
LTC3859ALIUHF#PBF 52
12.59 $
252.59 $
1002.59 $
Buy Now
LTC3859ALIFE#PBF 50
12.67 $
1002.67 $
Buy Now
LTC3859ALEUHF#PBF 52
12.34 $
252.34 $
1002.34 $
Buy Now

Farnell element14

ProductStockPriceBuy
LTC3859AEFE#PBF 34
13.96 GBP
253.86 GBP
Buy Now
LTC3859ALEFE#PBF 81
13.96 GBP
253.67 GBP
Buy Now
LTC3859ALMPUHF#PBF 49
111.13 GBP
2510.91 GBP
Buy Now
LTC3859ALHFE#PBF 39
14.63 GBP
254.48 GBP
Buy Now
LTC3859ALHUHF#PBF 29
14.49 GBP
254.34 GBP
1004.25 GBP
Buy Now

Available Distributors without stock: 1

Mouser Electronics

ProductStockPriceBuy
LTC3859ALEUHF#TRPBF 0
25005.49 $
Buy Now
LTC3859ALIUHF#TRPBF 0
25006.15 $
Buy Now
LTC3859ALEUHF#PBF 0
1565.39 $
Buy Now
LTC3859AEUHF#PBF 0
1565.39 $
Buy Now
LTC3859AEFE#PBF 0
1505.61 $
Buy Now
LTC3859ALEFE#PBF 0
1505.61 $
Buy Now
LTC3859ALMPFE#PBF 0
5019.89 $
10016.91 $
Buy Now
LTC3859AMPFE#PBF 0
5019.89 $
10016.91 $
Buy Now
LTC3859ALMPUHF#PBF 0
5219.21 $
10416.32 $
Buy Now
LTC3859AMPUHF#PBF 0
5219.21 $
10416.32 $
Buy Now
LTC3859ALIFE#PBF 0
1506.26 $
Buy Now
LTC3859AIFE#PBF 0
1506.26 $
Buy Now
LTC3859ALIUHF#PBF 0
1566.05 $
Buy Now
LTC3859AIUHF#PBF 0
1566.05 $
Buy Now
LTC3859ALHFE#PBF 0
1506.63 $
Buy Now

Table with equivalents and alternatives

The following Buck Controller are similar to LTC3859A. Or, compare LTC3859A side-by-side with other Buck Controller via the Comparison function.

Variation Compare Product Manufacturer Package
0% LTC3859AL LTC3859AL product overviewLTC3859AL product overview Linear Technology QFN-38, TSSOP-38

Inductor suggestions

Below you can find matching inductors from Wuerth Elektronik calculated on the maximum parameters of LTC3859A.

V-IN max. 38 V, I-OUT 25 A, V-OUT min. 0.8 V, Frequency typ. 900 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
744304010 0.1 26.0 52.0 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
744308015 0.2 27.0 58.0 0.37 10.1 x 7 x 7
744355215 0.2 25.0 60.0 0.58 10.5 x 10.2 x 4.2
0Results
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10% tolerance (0)
25% tolerance (0)
50% tolerance (0)
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