LTC3125 Boost Converter Overview



LTC3125 is a 5.25 V, 1.80 A switch current limit sync Boost Converter from . The input voltage from 1.80 V to 5.50 V  can be boosted into an output voltage ranging from 2.00 V to 5.25 V.

Features of the Boost Converter are fixed 1600 kHz switching frequency, a typical inductor size of 2.2 µH and it offers a peak efficiency of  up to 93 %. The minimum external component count is 7 and LTC3125 is available in 1 package option(s): DFN-8 .

For LTC3125 replacement search, 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.

Search Filter
V-IN min. 1.80 V
V-IN max. 5.50 V
Current-Limit typ.? 1.80 A
V-OUT min. 2.00 V
V-OUT max. 5.25 V
VOUT adjustable
VOUT programmable no
sync/non-sync sync
Frequency typ. 1600 kHz
Frequency adjustable fixed
Frequency selectable
Frequency adj. min.
Frequency adj. max.
extern clock sync. no
Softstart yes
Softstart adjustable no
Tracking no
PG/Power OK no
Frequency sync. min.
Frequency sync. max.
Down Mode no
Quiescent current max. 500 µA
Operating min.
Operating max.
Junction min. -40 °C
Junction max. 125 °C
thermal shutdown typ. 160 °C
Inductor size typ. 2.2 µH
Inductor suggested by Würth Elektronik
Automotive AEC-Q100 no
Light-Load-Mode yes
Topology Boost
Peak Efficiency 93 %
Component count min. 7
current limit adjustable yes
Nr.of package options 1

LTC3125 Datasheet

Link to the most up-to-date LTC3125 datasheet and the product page for EVM, tools and support information.


LTC3125 Price breaks and distributor sample stock

LTC3125 prices and available online distributors.

Available Distributors with stock: 0

no online Distributor with LTC3125 stock available

Available Distributors with stock: 0

no online Distributor with LTC3125 stock available

Alternatives and equivalents

The following DC/DC Boost Converter are similar to LTC3125. Optional, compare LTC3125 side-by-side with other Boost Converter via the Comparison function.

Variation Compare Product Manufacturer Package
0% MAX1763 MAX1763 product overviewMAX1763 product overview Maxim Integrated TSSOP-EP-16
0% MAX8627 MAX8627 product overviewMAX8627 product overview Maxim Integrated TDFN-EP-14
25% AS1326 AS1326 product overviewAS1326 product overview AMS TDFN-10
25% MAX1760 MAX1760 product overviewMAX1760 product overview Maxim Integrated TDFN-EP-10, uMAX-10
25% MAX1765 MAX1765 product overviewMAX1765 product overview Maxim Integrated TSSOP-EP-16
25% TPS61251 TPS61251 product overviewTPS61251 product overview Texas Instruments QFN-8
25% TPS61252 TPS61252 product overviewTPS61252 product overview Texas Instruments QFN-8

Inductor suggestions

Below you can find matching inductors from Wuerth Elektronik calculated on the maximum parameters of LTC3125.

V-IN min. 1.8 V, Current-Limit typ. 1.8 A, V-OUT max. 5.25 V, Frequency typ. 1600 kHz
Order Code Spec L (µH) IR (A) ISAT (A) RDC (mΩ) L x W x H (mm)
744305040 0.4 28.0 20.0 0.16 13.5 x 13.3 x 5.2
744306030 0.3 26.0 24.0 0.30 10.5 x 10.3 x 5.5
7443081040 0.4 38.0 21.0 0.29 9.4 x 6.2 x 8.1
744316033 0.3 18.5 20.0 1.75 5.5 x 5.3 x 4.3
744373240033 0.3 8.0 16.5 7.80 4.45 x 4.06 x 2
744373340033 0.3 8.2 24.0 6.30 5.7 x 5.2 x 2
744373360033 0.3 9.6 22.0 4.30 5.7 x 5.2 x 3
744383560033 0.3 9.6 12.4 6.00 4.1 x 4.1 x 2.1
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