LTC3538 Buck-Boost Converter Overview
Description
LTC3538 is a 5.50 V, 0.80 A output current sync Buck-Boost Converter from . The 2.40 V to 5.50 V input range can be converted into a 1.80 V to 5.25 V output voltage.
The Buck-Boost Converter features fixed 1000 kHz switching frequency, requires a typical inductor size of 3.3 µH and provides a peak efficiency of 95 %. LTC3538 circuitry consists typically of 9 external components and is available in 1 package option(s): DFN-8 .
Parameter and feature overview with replacement search
For LTC3538 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. | 2.40 V | |
| V-IN max. | 5.50 V | |
| I-OUT? | 0.80 A | |
| V-OUT min. | 1.80 V | |
| V-OUT max. | 5.25 V | |
| V-OUT fixed | adjustable | |
| V-OUT programmable |  |
|
| sync/non-sync | sync | |
| Frequency typ. | 1000 kHz | |
| Frequency adjustable | fixed | |
| Frequency adjustable min. | ||
| Frequency adjustable max. | ||
| ext.clock sync | |
|
| Frequency sync. min. | ||
| Frequency sync. max. | ||
| Softstart |  |
|
| Softstart adjustable | |
|
| Tracking | |
|
| PG/Power OK | |
|
| Quiescent current max. | 1800 µA | |
| Operating min. | -40 °C | |
| Operating max. | 85 °C | |
| Junction min. | ||
| Junction max. | 125 °C | |
| thermal shutdown typ. | ||
| Inductor size typ. | 3.3 µH | |
| Automotive AEC-Q100 | |
|
| Light-Load Mode | |
|
| Topology | Buck-Boost | |
| Peak Efficiency | 95 % | |
| Component count min. | 9 | |
| current limit adjustable | |
|
| LBI/LBO | |
|
| Nr. of package options | 1 | |
| CSP | ||
| SOT | ||
| MSOP | ||
| QFN | DFN-8 | |
| SO/SOIC | ||
| SOP |
Charts and pictures
LTC3538 Datasheet
Link to the most up-to-date LTC3538 datasheet and the product page for EVM, tools and support information.
LTC3538 Distributor price breaks and sample stock
LTC3538 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: 0
Equivalents and alternatives
The following Buck-Boost DC/DC Converter are similar to LTC3538. Optional, compare LTC3538 side-by-side with other selected Buck-Boost Converter via the Comparison function.
| Variation | Compare | Product | Manufacturer | Package | |
| 0% | ISL9110 |  ISL9110 product overview |
Intersil | DFN-12 | |
| 0% | RT6150A | RT6150A product overview |
Richtek | WDFN-10 | |
| 0% | RT6150B | RT6150B product overview |
Richtek | WDFN-10 | |
| 0% | TPS63000 | TPS63000 product overview |
Texas Instruments | QFN-10 | |
| 0% | TPS63000-Q1 | TPS63000-Q1 product overview |
Texas Instruments | QFN-10 | |
| 0% | TPS63010 | TPS63010 product overview |
Texas Instruments | CSP-20 | |
| 0% | TPS63030 | TPS63030 product overview |
Texas Instruments | QFN-10 | |
| 0% | ISL9110A | ISL9110A product overview |
Intersil | CSP-20 | |
| 10% | ISL9112 | ISL9112 product overview |
Intersil | DFN-12 | |
| 10% | MAX8625A | MAX8625A product overview |
Maxim Integrated | TDFN-14 | |
| 10% | MB39C326 | MB39C326 product overview |
Spansion | WLCSP-20 | |
| 10% | XC9306 | XC9306 product overview |
Torex | WLP-20 | |
| 25% | LTC3441 | LTC3441 product overview |
Linear Technology | DFN-12 | |
| 25% | LTC3442 | LTC3442 product overview |
Linear Technology | DFN-12 | |
| 25% | LTC3443 | LTC3443 product overview |
Linear Technology | DFN-12 | |
| 25% | LTC3530 | LTC3530 product overview |
Linear Technology | MSOP-10, DFN-10 | |
| 25% | TPS63036 | TPS63036 product overview |
Texas Instruments | WLCSP-8, VQFN-12 | |
| 25% | LTC3130 | LTC3130 product overview |
Linear Technology | MSOP-16, QFN-20 | |
| 25% | LTC3130-1 | LTC3130-1 product overview |
Linear Technology | MSOP-16, QFN-20 | |
| 50% | LTC3440 | LTC3440 product overview |
Linear Technology | MSOP-10, DFN-10 | |
| 50% | LTC3444 | LTC3444 product overview |
Linear Technology | DFN-8 | |
| 50% | LTC3534 | LTC3534 product overview |
Linear Technology | DFN-16, SSOP-16 | |
| 50% | LTC3522 | LTC3522 product overview |
Linear Technology | QFN-16 |
Inductor suggestions
Below you can find matching inductors from Wuerth Elektronik calculated on the maximum parameters of LTC3538.
| Order Code | Spec | L (µH) | IR (A) | ISAT (A) | RDC (mΩ) | L x W x H (mm) |
| 744025003 | 3.3 | 1.5 | 1.8 | 85.00 | 2.8 x 2.8 x 3 | |
| 744025004 | 4.7 | 1.4 | 1.7 | 100.00 | 2.8 x 2.8 x 3 | |
| 744031003 | 3.6 | 1.4 | 1.1 | 66.00 | 3.8 x 3.8 x 1.8 | |
| 74404024033 | 3.3 | 1.4 | 1.3 | 120.00 | 2.5 x 2 x 1.2 | |
| 74404024047 | 4.7 | 1.1 | 1.2 | 175.00 | 2.5 x 2 x 1.2 | |
| 74404032033 | 3.3 | 1.5 | 1.5 | 70.00 | 3 x 3 x 1.5 | |
| 74404032047 | 4.7 | 1.3 | 1.2 | 96.00 | 3 x 3 x 1.5 | |
| 74404041033 | 3.3 | 1.8 | 2.1 | 69.00 | 4 x 4 x 1.2 | |
| 74404041047 | 4.7 | 1.6 | 1.9 | 91.00 | 4 x 4 x 1.2 | |
| 74404042047 | 4.7 | 1.7 | 2.2 | 70.00 | 4 x 4 x 1.8 | |
| 744042003 | 3.3 | 2.0 | 1.8 | 50.00 | 4.8 x 4.8 x 2 | |
| 7440420039 | 3.9 | 1.8 | 1.7 | 60.00 | 4.8 x 4.8 x 2 | |
| 744042004 | 4.7 | 1.7 | 1.7 | 70.00 | 4.8 x 4.8 x 2 | |
| 744043003 | 3.3 | 2.2 | 1.8 | 30.00 | 4.8 x 4.8 x 3 | |
| 7440430039 | 3.9 | 1.7 | 1.7 | 50.00 | 4.8 x 4.8 x 3 | |
| 744043004 | 4.7 | 1.6 | 1.7 | 50.00 | 4.8 x 4.8 x 3 | |
| 744045004 | 4.7 | 1.2 | 2.0 | 120.00 | 4.5 x 3.2 x 2.9 | |
| 7440520039 | 3.9 | 2.0 | 2.1 | 50.00 | 5.8 x 5.8 x 2 | |
| 744052005 | 5.0 | 1.7 | 1.8 | 50.00 | 5.8 x 5.8 x 2 | |
| 744053004 | 4.2 | 2.5 | 2.2 | 30.00 | 5.8 x 5.8 x 3 | |
| 7440530047 | 4.7 | 2.4 | 2.0 | 30.00 | 5.8 x 5.8 x 3 | |
| 744053005 | 5.3 | 2.3 | 1.9 | 30.00 | 5.8 x 5.8 x 3 | |
| 744062005 | 5.0 | 2.2 | 2.0 | 40.00 | 6.8 x 6.8 x 2.5 | |
| 7440680033 | 3.3 | 2.0 | 1.8 | 61.00 | 8 x 8 x 1.2 | |
| 7440680047 | 4.7 | 1.9 | 1.6 | 72.00 | 8 x 8 x 1.2 | |
| 7440690047 | 4.7 | 2.2 | 1.8 | 56.00 | 8 x 8 x 1.5 | |
| 7440700047 | 4.7 | 3.0 | 2.2 | 37.00 | 8 x 8 x 2 | |
| 74438323033 | 3.3 | 1.3 | 2.1 | 220.00 | 2.5 x 2 x 1 | |
| 74438323047 | 4.7 | 0.9 | 1.8 | 338.00 | 2.5 x 2 x 1 | |
| 74438324047 | 4.7 | 1.0 | 2.1 | 300.00 | 2.5 x 2 x 1.2 | |
| 74479888233 | 3.3 | 1.1 | 1.1 | 250.00 | 2.5 x 2 x 1 | |
| 74479889233 | 3.3 | 1.3 | 1.3 | 250.00 | 2.5 x 2 x 1.2 | |
| 78438323033 | 3.3 | 1.3 | 2.1 | 220.00 | 2.5 x 2 x 1 | |
| 78438323047 | 4.7 | 0.9 | 1.8 | 338.00 | 2.5 x 2 x 1 |
