LTC3809 Buck Controller overview

Description

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Category
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LTC3809 is a 1 channel, 1 phase sync Buck Controller. The maximum input voltage ranges from 2.75 V to 9.80 V and output current goes up to 5.00 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 LTC3809 is available in 2 package option(s): MS-10 DFN-10 .

Parameter and features overview

ParameterValueReplacement
Search Filter
Nr. of Channel 1
V-IN min. 2.75 V
V-IN max. 9.80 V
I-OUT? 5.00 A
V-OUT min. 0.60 V
V-OUT max. 9.80 V
V-OUT adjustable
V-OUT programmable
sync/non-sync sync
Frequency typ. 750 kHz
Frequency adj. adjustable
Frequency adj. min.
Frequency adj. max.
ext.clock sync. yes
ext.clock Frequency min. 250 kHz
ext.clock Frequency max. 750 kHz
Softstart
Softstart adjustable
Tracking no
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 2
CSP
SOT
MSOP MS-10
QFN/DFN DFN-10
SO/SOIC
SOP
DIP

LTC3809 Datasheet

Link to the most up-to-date LTC3809 datasheet and the product page for EVM, tools and support information.

LTC3809

LTC3809 inventory, samples and price

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Available Distributors with stock: 3

Chip One Stop (1)

ProductStockPriceBuy
LTC3809EMSE#PBF160
18.66 USD
106.13 USD
255.85 USD
505.38 USD
1005.10 USD
Buy Now

Digi-Key (3)

ProductStockPriceBuy
LTC3809EDD-1#PBF183
15.03 USD
253.57 USD
1002.94 USD
Buy Now
LTC3809EDD#PBF50
15.03 USD
253.57 USD
1002.94 USD
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DC882A2
1125.63 USD
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LTC3809EMSE#PBF0
5002.94 USD
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LTC3809EMSE-1#PBF0
5002.94 USD
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LTC3809EMSE#TRPBF0
25003.04 USD
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LTC3809EMSE-1#TRPBF0
25003.04 USD
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LTC3809EDD#TRPBF0
25003.04 USD
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LTC3809EDD-1#TRPBF0
25003.04 USD
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LTC3809IDD-1#PBF0
2423.15 USD
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LTC3809IMSE-1#PBF0
5003.15 USD
Buy Now
LTC3809IDD-1#TRPBF0
25003.25 USD
Buy Now
LTC3809IMSE-1#TRPBF0
25003.25 USD
Buy Now

NEWARK (1)

ProductStockPriceBuy
LTC3809EDD#PBF110
15.03 USD
253.56 USD
1002.94 USD
Buy Now
LTC3809EMSE#PBF0
15.30 USD
253.53 USD
502.94 USD
Buy Now

Available Distributors with stock: 0

no online Distributor with LTC3809 stock available

Table with equivalents and alternatives

The following Buck Controller are similar to LTC3809. Or, compare LTC3809 side-by-side with other Buck Controller via the Comparison function.

Variation Compare Product Manufacturer Package
0% LTC3808 LTC3808 product overviewLTC3808 product overview Linear Technology DFN-16, SSOP-16
25% LTC3891 LTC3891 product overviewLTC3891 product overview Linear Technology QFN-20, TSSOP-20

Inductor suggestions

Below you can find matching inductors from Wuerth Elektronik calculated on the maximum parameters of LTC3809.

V-IN max. 9.8 V, I-OUT 5 A, V-OUT min. 0.6 V, Frequency typ. 750 kHz
Order Code Spec L (µH) IR (A) ISAT (A) RDC (mΩ) L x W x H (mm)
74407000047 0.5 7.8 6.5 5.80 8 x 8 x 2
744373210047 0.5 5.4 9.0 18.00 4.45 x 4.06 x 1.2
744373240056 0.6 6.0 10.5 13.50 4.45 x 4.06 x 2
744373240068 0.7 5.5 10.0 16.00 4.45 x 4.06 x 2
744383560056 0.6 8.5 10.8 7.00 4.1 x 4.1 x 2.1
744383560068 0.7 8.2 9.4 7.50 4.1 x 4.1 x 2.1
744778005 0.5 5.6 9.0 7.20 7.3 x 7.3 x 3.4
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