LTC3531 Buck-Boost Converter Overview

Description

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LTC3531 is a 5.50 V, 0.20 A output current sync Buck-Boost Converter from . The 1.80 V to 5.50 V input range can be converted into a 2.00 V to 5.00 V output voltage.

The Buck-Boost Converter features fixed 80 kHz switching frequency, requires a typical inductor size of 10.0 µH and provides a peak efficiency of 90 %. LTC3531 circuitry consists typically of 5 external components and is available in 1 package option(s): DFN-8 .

For LTC3531 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.

ParameterValueReplacement
Search Filter
V-IN min. 1.80 V
V-IN max. 5.50 V
I-OUT? 0.20 A
V-OUT min. 2.00 V
V-OUT max. 5.00 V
V-OUT fixed adjustable
V-OUT programmable no
sync/non-sync sync
Frequency typ. 80 kHz
Frequency adjustable fixed
Frequency adjustable min.
Frequency adjustable max.
ext.clock sync no
Frequency sync. min.
Frequency sync. max.
Softstart no
Softstart adjustable no
Tracking no
PG/Power OK no
Quiescent current max. 30 µA
Operating min. -40 °C
Operating max. 85 °C
Junction min.
Junction max.
thermal shutdown typ.
Inductor size typ. 10.0 µH
Automotive AEC-Q100 no
Light-Load Mode yes
Topology Buck-Boost
Peak Efficiency 90 %
Component count min. 5
current limit adjustable no
LBI/LBO no
Nr. of package options 1
CSP
SOT
MSOP
QFN DFN-8
SO/SOIC
SOP

Charts and pictures

LTC3531 Datasheet

Link to the most up-to-date LTC3531 datasheet and the product page for EVM, tools and support information.

LTC3531

LTC3531 Distributor price breaks and sample stock

LTC3531 prices and available buy online distributors. Optional, check regional sources for price and inventory: for Russia via efind, for South Korea via ICPart, for Japan via ICBAIBAI, for China via IC5858 or International via IC2IC.

OEMSecrets.com
findchips.com

Available Distributors with stock: 0

no online Distributor with LTC3531 stock available

Available Distributors with stock: 0

no online Distributor with LTC3531 stock available

Equivalents and alternatives

The following Buck-Boost DC/DC Converter are similar to LTC3531. Optional, compare LTC3531 side-by-side with other selected Buck-Boost Converter via the Comparison function.

Variation Compare Product Manufacturer Package
25% AS1337 AS1337 product overviewAS1337 product overview AMS TDFN-8
50% LTC3129 LTC3129 product overviewLTC3129 product overview Linear Technology MSOP-16, QFN-16
50% LTC3129-1 LTC3129-1 product overviewLTC3129-1 product overview Linear Technology MSOP-16, QFN-16

Inductor suggestions

Below you can find matching inductors from Wuerth Elektronik calculated on the maximum parameters of LTC3531.

V-IN max. 5.5 V, I-OUT 0.2 A, V-OUT min. 2 V, Frequency typ. 80 kHz
Order Code Spec L (µH) IR (A) ISAT (A) RDC (mΩ) L x W x H (mm)
74404042221 220.0 0.3 0.4 3,450.00 4 x 4 x 1.8
744052221 220.0 0.2 0.3 2,400.00 5.8 x 5.8 x 2
744053221 220.0 0.3 0.3 1,170.00 5.8 x 5.8 x 3
744062221 220.0 0.4 0.3 1,010.00 6.8 x 6.8 x 2.5
7447462221 220.0 0.5 0.5 960.00 5.5 x 5.5 x 8.5
744777270 270.0 0.4 0.5 970.00 7.3 x 7.3 x 4.5
7447779270 270.0 0.4 0.5 1,090.00 7.3 x 7.3 x 4.5
744778218 180.0 0.5 0.5 960.00 7.3 x 7.3 x 3.4
744778222 220.0 0.4 0.4 1,220.00 7.3 x 7.3 x 3.4
744778270 270.0 0.4 0.4 1,440.00 7.3 x 7.3 x 3.4
7447789218 180.0 0.5 0.5 960.00 7.3 x 7.3 x 3.5
7447789222 220.0 0.4 0.4 1,350.00 7.3 x 7.3 x 3.5
7447789270 270.0 0.4 0.4 1,470.00 7.3 x 7.3 x 3.5
7447790221 220.0 0.6 0.5 640.00 6 x 6 x 6.5
784774218 180.0 0.4 0.5 850.00 5.2 x 5.8 x 4.85
784774222 220.0 0.4 0.5 945.00 5.2 x 5.8 x 4.85
784778221 220.0 0.5 0.5 1,350.00 7.3 x 7.3 x 3.5
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