LTC3851 Buck Controller overview

Description

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LTC3851 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 LTC3851 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

LTC3851 Datasheet

Link to the most up-to-date LTC3851 datasheet and the product page for EVM, tools and support information.

LTC3851

LTC3851 inventory, samples and price

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Available Distributors with stock: 0

no online Distributor with LTC3851 stock available

Available Distributors with stock: 0

no online Distributor with LTC3851 stock available

Table with equivalents and alternatives

The following Buck Controller are similar to LTC3851. Or, compare LTC3851 side-by-side with other Buck Controller via the Comparison function.

Variation Compare Product Manufacturer Package
0% LTC3851A LTC3851A product overviewLTC3851A 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 LTC3851.

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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