LT3740 Buck Controller overview

Description

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LT3740 is a 1 channel, 1 phase sync Buck Controller. The maximum input voltage ranges from 2.20 V to 22.00 V and output current goes up to 20.00 A.

The Controller features fixed 300 kHz switching frequency which results in a typical inductor size of 0.0 uH and a peak efficiency of %. The LT3740 is available in 1 package option(s): DFN-16 .

Parameter and features overview

ParameterValueReplacement
Search Filter
Nr. of Channel 1
V-IN min. 2.20 V
V-IN max. 22.00 V
I-OUT? 20.00 A
V-OUT min. 0.80 V
V-OUT max. 5.00 V
V-OUT adjustable
V-OUT programmable
sync/non-sync sync
Frequency typ. 300 kHz
Frequency adj. fixed
Frequency adj. min.
Frequency adj. max.
ext.clock sync. no
ext.clock Frequency min.
ext.clock Frequency max.
Softstart yes
Softstart adjustable
Tracking yes
Power Good (PG) yes
Enable
Operating min.
Operating max.
Junction min.
Junction max.
thermal shutdown typ.
Inductor size typ.
Automotive AEC-Q100
Light-Load Mode
Single/ Multiphase single
Nr. of Phases 1
Peak Efficiency
component count min.
current limit adjustable
Nr.of package options 1
CSP
SOT
MSOP
QFN/DFN DFN-16
SO/SOIC
SOP
DIP

LT3740 Datasheet

Link to the most up-to-date LT3740 datasheet and the product page for EVM, tools and support information.

LT3740

LT3740 inventory, samples and price

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Available Distributors with stock: 4

ARROW-NAC (2)

ProductStockPriceBuy
LT3740EDHC#PBF4011
12.96 USD
1002.44 USD
Buy Now
LT3740EDHC#TRPBF10000
25002.49 USD
Buy Now

Chip-One-Stop (2)

ProductStockPriceBuy
LT3740EDHC#PBF6365
14.52 USD
103.80 USD
253.76 USD
503.58 USD
1003.50 USD
2003.34 USD
Buy Now
LT3740EDHC#TRPBF5000
25002.81 USD
Buy Now

DIGI-KEY (2)

ProductStockPriceBuy
LT3740EDHC#PBF605
13.89 USD
252.96 USD
1002.44 USD
Buy Now
DC947A2
1125.63 USD
Buy Now
LT3740EDHC#TRPBF0
25002.54 USD
Buy Now

NEWARK (1)

ProductStockPriceBuy
LT3740EDHC#PBF146
12.54 USD
Buy Now

Available Distributors with stock: 0

no online Distributor with LT3740 stock available

Table with equivalents and alternatives

The following Buck Controller are similar to LT3740. Or, compare LT3740 side-by-side with other Buck Controller via the Comparison function.

no alternatives found

Inductor suggestions

Below you can find matching inductors from Wuerth Elektronik calculated on the maximum parameters of LT3740.

V-IN max. 22 V, I-OUT 20 A, V-OUT min. 0.8 V, Frequency typ. 300 kHz
Order Code Spec L (µH) IR (A) ISAT (A) RDC (mΩ) L x W x H (mm)
744301033 0.3 40.0 46.0 0.32 11.3 x 11 x 9.4
744301047 0.5 40.0 35.0 0.32 11.3 x 11 x 9.4
744305033 0.3 28.0 26.0 0.16 13.5 x 13.3 x 5.2
744308033 0.3 27.0 30.0 0.37 10.1 x 7 x 7
744308040 0.4 25.0 26.0 0.37 10.1 x 7 x 7
744309047 0.5 47.5 40.5 0.17 14 x 13 x 9.5
744325040 0.4 24.0 37.0 0.67 10.5 x 10.2 x 5
7443320047 0.5 26.0 48.0 1.35 12.1 x 11.4 x 10
7443330047 0.5 20.5 47.0 1.60 10.9 x 10 x 9.7
744355047 0.5 26.0 50.0 0.90 13 x 12.8 x 5
744355147 0.5 30.0 50.0 0.64 13.2 x 12.8 x 6.5
744355256 0.6 20.0 30.0 1.61 10.5 x 10.2 x 4.2
744373680045 0.5 20.0 50.0 1.30 11 x 10 x 4
744373770033 0.3 24.0 35.0 0.88 13.5 x 12.6 x 3.5
74477009 0.5 23.5 26.4 2.90 12 x 12 x 8
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