LT3976 Buck Converter overview

Description

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LT3976 is a 40.00 V non-sync Buck Converter from with 5.00 A output current. The maximum 40.00 V input voltage can be regulated down into a 1.20 V to 38.00 V output voltage.

It requires are a typical inductor size of 3.30 µH, a typical external component count of 10 and achieves a peak efficiency of 90 %. Further LT3976 characteristics are a adjustable 1000 kHz switching frequency and 1 available package option(s): MSOP-16 .

For the LT3976 replacement search, please select a main parameter tolerance value and adjust the checkboxes for feature match. The product counter within the button shows the number of available equivalents and a click on the replacement button shows all possible replacements within a parametric overview.

ParameterValueReplacement
Search Filter
V-IN min. 4.30 V
V-IN max. 40.00 V
I-OUT? 5.00 A
V-OUT min. 1.20 V
V-OUT max. 38.00 V
V-OUT adjustable V
V-OUT programmable no
sync/non-sync non-sync
Frequency typ. 1000 kHz
Frequency adjustable
Frequency selectable
ext.clock sync. yes
Frequency adj./ ext.clock min. 200 kHz
Frequency adj./ ext.clock max 2250 kHz
Softstart yes
Softstart adjustable yes
Tracking no
PG/Power OK yes
Quiescent current max. 30 µA
Operating min.
Operating max.
Junction min. -40 °C
Junction max. 125 °C
thermal shutdown typ.
Inductor size typ. 3.30 µH
Inductor suggested by Würth Elektronik
Automotive AEC-Q100 no
Light-Load-Mode yes
Topology Buck
Peak Efficiency 90 %
Component count min. 10
current limit adjustable no
Nr.of packages 1
CSP
SC70
SOT
MSOP MSOP-16
QFN/DFN
SO/SOIC
SOP
DIP
TO
DDPAK

LT3976 Datasheet

Link to the most up-to-date LT3976 datasheet and the product page for EVM, tools and support information.

LT3976

LT3976 Sample stock and distributor price breaks

LT3976 prices and online available distributors.

OEMSecrets.com
findchips.com

Available Distributors with stock: 0

no online Distributor with LT3976 stock available

Available Distributors with stock: 0

no online Distributor with LT3976 stock available

List of equivalents and alternatives

The following DC/DC Buck Converter are similar to LT3976. Optional, compare LT3976 side-by-side with other Buck Converter via the Comparison function.

Variation Compare Product Manufacturer Package
0% TPS54541 TPS54541 product overviewTPS54541 product overview Texas Instruments SON-10
50% A8583 A8583 product overviewA8583 product overview Allegro TSSOP-16
50% A8584 A8584 product overviewA8584 product overview Allegro TSSOP-16
50% LT3975 LT3975 product overviewLT3975 product overview Linear Technology MSOP-16
50% LM26003 LM26003 product overviewLM26003 product overview Texas Instruments HTSSOP-20
50% LM26003-Q1 LM26003-Q1 product overviewLM26003-Q1 product overview Texas Instruments HTSSOP-20
50% TPS54240 TPS54240 product overviewTPS54240 product overview Texas Instruments SON-10, MSOP-10
50% TPS54240-Q1 TPS54240-Q1 product overviewTPS54240-Q1 product overview Texas Instruments SON-10, MSOP-10
50% TPS54362-Q1 TPS54362-Q1 product overviewTPS54362-Q1 product overview Texas Instruments HTSSOP-20
50% TPS54361 TPS54361 product overviewTPS54361 product overview Texas Instruments WSON-10
50% TPS54361-Q1 TPS54361-Q1 product overviewTPS54361-Q1 product overview Texas Instruments WSON-10

Inductor suggestions

Below you can find matching inductors from Wuerth Elektronik calculated on the maximum parameters of LT3976.

V-IN max. 40 V, I-OUT 5 A, V-OUT min. 1.2 V, Frequency typ. 1000 kHz
Order Code Spec L (µH) IR (A) ISAT (A) RDC (mΩ) L x W x H (mm)
744040630082 0.8 6.0 9.5 10.00 6 x 6 x 2.8
7440710082 0.8 7.3 8.0 7.00 8 x 8 x 4.6
744314076 0.8 15.5 15.0 2.25 7 x 6.9 x 5
744316068 0.7 12.8 13.5 4.00 5.5 x 5.3 x 4.3
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
744373340068 0.7 6.2 14.0 11.00 5.7 x 5.2 x 2
744373360068 0.7 8.0 15.0 10.00 5.7 x 5.2 x 3
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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