LTC3858-2 Buck Controller overview

Description

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LTC3858-2 is a 2 channel, 2 phase sync Buck Controller. The maximum input voltage ranges from 4.00 V to 38.00 V and output current goes up to 20.00 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 LTC3858-2 is available in 1 package option(s): QFN-32 .

Parameter and features overview

ParameterValueReplacement
Search Filter
Nr. of Channel 2
V-IN min. 4.00 V
V-IN max. 38.00 V
I-OUT? 20.00 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 1
CSP
SOT
MSOP
QFN/DFN QFN-32
SO/SOIC
SOP
DIP

LTC3858-2 Datasheet

Link to the most up-to-date LTC3858-2 datasheet and the product page for EVM, tools and support information.

LTC3858-2

LTC3858-2 inventory, samples and price

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Available Distributors with stock: 0

no online Distributor with LTC3858 stock available

Available Distributors with stock: 0

no online Distributor with LTC3858 stock available

Table with equivalents and alternatives

The following Buck Controller are similar to LTC3858-2. Or, compare LTC3858-2 side-by-side with other Buck Controller via the Comparison function.

Variation Compare Product Manufacturer Package
0% LTC3890 LTC3890 product overviewLTC3890 product overview Linear Technology QFN-32
0% LTC3890-1 LTC3890-1 product overviewLTC3890-1 product overview Linear Technology SSOP-28
0% LTC3890-2 LTC3890-2 product overviewLTC3890-2 product overview Linear Technology QFN-32
0% LTC3890-3 LTC3890-3 product overviewLTC3890-3 product overview Linear Technology SSOP-28
10% LTC3773 LTC3773 product overviewLTC3773 product overview Linear Technology QFN-38, SSOP-36
10% LTC3826 LTC3826 product overviewLTC3826 product overview Linear Technology QFN-32
10% LTC3826-1 LTC3826-1 product overviewLTC3826-1 product overview Linear Technology SSOP-28
25% LTC3802 LTC3802 product overviewLTC3802 product overview Linear Technology QFN-32, SSOP-28

Inductor suggestions

Below you can find matching inductors from Wuerth Elektronik calculated on the maximum parameters of LTC3858-2.

V-IN max. 38 V, I-OUT 20 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
744303015 0.2 31.0 42.0 0.33 10 x 6.8 x 5
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
744310013 0.1 22.0 48.0 0.91 7 x 6.9 x 3.3
744325016 0.2 25.0 58.0 0.51 10.5 x 10.2 x 5
744355019 0.2 29.0 60.0 0.50 13 x 12.8 x 5
744355215 0.2 25.0 60.0 0.58 10.5 x 10.2 x 4.2
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