LTC3531-3.0 Buck-Boost Converter Overview
Description
LTC3531-3.0 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 3.00 V to 3.00 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 %. LTC3531-3.0 circuitry consists typically of 3 external components and is available in 2 package option(s): TSOT23-6 DFN-8 .
Parameter and feature overview with replacement search
For LTC3531-3.0 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.
Parameter | Value | Replacement Search Filter |
V-IN min. | 1.80 V | |
V-IN max. | 5.50 V | |
I-OUT? | 0.20 A | |
V-OUT min. | 3.00 V | |
V-OUT max. | 3.00 V | |
V-OUT fixed | 3.00 | |
V-OUT programmable | ![]() |
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sync/non-sync | sync | |
Frequency typ. | 80 kHz | |
Frequency adjustable | fixed | |
Frequency adjustable min. | ||
Frequency adjustable max. | ||
ext.clock sync | ![]() |
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Frequency sync. min. | ||
Frequency sync. max. | ||
Softstart | ![]() |
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Softstart adjustable | ![]() |
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Tracking | ![]() |
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PG/Power OK | ![]() |
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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 | ![]() |
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Light-Load Mode | ![]() |
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Topology | Buck-Boost | |
Peak Efficiency | 90 % | |
Component count min. | 3 | |
current limit adjustable | ![]() |
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LBI/LBO | ![]() |
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Nr. of package options | 2 | |
CSP | ||
SOT | TSOT23-6 | |
MSOP | ||
QFN | DFN-8 | |
SO/SOIC | ||
SOP |
Charts and pictures
LTC3531-3.0 Datasheet
Link to the most up-to-date LTC3531-3.0 datasheet and the product page for EVM, tools and support information.
LTC3531-3.0 Distributor price breaks and sample stock
LTC3531-3.0 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.


Available Distributors with stock: 0
Available Distributors with stock: 8
Arrow Electronics
Product | Stock | Price | Buy | ||||||||||||
LTC3531EDD-3.3#TRPBF | 2500 |
| Buy Now | ||||||||||||
LTC3531ES6-3.3#TRPBF | 988 |
| Buy Now | ||||||||||||
LTC3531EDD-3.3#PBF | 351 |
| Buy Now | ||||||||||||
LTC3531EDD-3.3#PBF | 14 |
| Buy Now | ||||||||||||
LTC3531ES6-3#TRMPBF | 11 |
| Buy Now | ||||||||||||
LTC3531ES6-3.3#TRMPBF | 1 |
| Buy Now | ||||||||||||
LTC3531ES6-3#TRMPBF | 0 |
| Buy Now | ||||||||||||
LTC3531ES6-3.3#TRPBF | 0 |
| Buy Now | ||||||||||||
LTC3531ES6-3.3#TRMPBF | 0 |
| Buy Now | ||||||||||||
LTC3531EDD-3#PBF | 0 |
| Buy Now | ||||||||||||
LTC3531EDD-3#TRPBF | 0 |
| Buy Now | ||||||||||||
LTC3531ES6-3#TRPBF | 0 |
| Buy Now | ||||||||||||
LTC3531EDD#PBF | 0 |
| Buy Now | ||||||||||||
LTC3531EDD#TRPBF | 0 |
| Buy Now |
Digi-Key
Product | Stock | Price | Buy | ||||||
LTC3531EDD#PBF | 12373 |
| Buy Now | ||||||
LTC3531ES6-3.3#TRPBF | 2691 |
| Buy Now | ||||||
LTC3531ES6-3.3#TRPBF | 2691 |
| Buy Now | ||||||
LTC3531EDD#TRPBF | 2490 |
| Buy Now | ||||||
LTC3531EDD#TRPBF | 2490 |
| Buy Now | ||||||
LTC3531ES6-3.3#TRMPBF | 1946 |
| Buy Now | ||||||
LTC3531ES6-3.3#TRMPBF | 1946 |
| Buy Now | ||||||
LTC3531ES6-3.3#TRMPBF | 1500 |
| Buy Now | ||||||
LTC3531EDD-3.3#PBF | 1255 |
| Buy Now | ||||||
LTC3531ES6-3#TRMPBF | 196 |
| Buy Now | ||||||
LTC3531ES6-3#TRMPBF | 196 |
| Buy Now | ||||||
DC877A | 4 |
| Buy Now | ||||||
LTC3531ES6-3.3#TRPBF | 0 |
| Buy Now | ||||||
LTC3531EDD#TRPBF | 0 |
| Buy Now | ||||||
LTC3531ES6-3#TRMPBF | 0 |
| Buy Now |
Verical
Mouser Electronics
Bristol Electronics
Quest Components
RS Components
IChunt
Available Distributors without stock: 3
Richardson RFPD
element14 Asia-Pacific
Farnell element14
Equivalents and alternatives
The following Buck-Boost DC/DC Converter are similar to LTC3531-3.0. Optional, compare LTC3531-3.0 side-by-side with other selected Buck-Boost Converter via the Comparison function.
Variation | Compare | Product | Manufacturer | Package | |
0% | AS1331-3.0 | ![]() |
AMS | TDFN-10 |
Inductor suggestions
Below you can find matching inductors from Wuerth Elektronik calculated on the maximum parameters of LTC3531-3.0.
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 |