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A4491EESTR-T
A4491EESTR-T
Active
PMIC - Voltage Regulators - DC DC Switching Regulators
Description:  IC REG BUCK ADJ TRPL 20QFN
Manufacturer:  Allegro MicroSystems
Datasheet:   A4491EESTR-T Datasheet
History Price: $0.96000
In Stock: 37790
Distributors
Specification
PDF Datasheet
Equivalent
A4491EESTR-T Specification
Specification
Mfr Part
A4491EESTR-T
Category
PMIC - Voltage Regulators - DC DC Switching Regulators
Manufacturer
Allegro MicroSystems
Series
-
Packaging
Tape & Reel (TR)
Status
Active
Environmental Compliance
Lead Free
Radiation Hardening
No
REACH SVHC
No SVHC
RoHS
Compliant
HS Code
-
Technical Parameter
Function
Step-Down
Output Configuration
Positive
Topology
Buck
Output Type
Adjustable
Number of Outputs
3
Voltage - Input (Min)
4.5V
Voltage - Input (Max)
23V
Voltage - Output (Min/Fixed)
0.8V
Voltage - Output (Max)
20.7V
Current - Output
-
Frequency - Switching
550kHz
Synchronous Rectifier
No
Operating Temperature
-40 ℃ ~ 85 ℃ (TA)
Mounting Type
Surface Mount
Package / Case
20-WFQFN Exposed Pad
Supplier Device Package
20-QFN-EP (4x4)
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    Customer Reviews
    4.95 out of 5.00 stars from 170 customer reviews from all over the world
    Dainius Pocius
    Lithuania
    5 stars
    2026-09-29 19:05
    Gauta. Netikrints Veikimas.
    Mário André
    Brazil
    5 stars
    2026-09-29 17:06
    I took about the stock. I can't say anything significant. As I use at least one, I'll add a review.
    Ylenia Gallo
    Italy
    5 stars
    2026-09-28 05:33
    Perfect and arrived fast
    Heloísa Costa Nascimento
    Brazil
    5 stars
    2026-09-26 04:10
    Excellent, product as described, solved my problem, recommend, arrived very fast.
    Gabriela Mendes Neto
    Brazil
    5 stars
    2026-09-25 12:37
    Excellent Product!!! Working perfectly!!! Recommend to everyone.
    Lúcia Regina
    Brazil
    5 stars
    2026-09-25 12:36
    Receive I haven't tested yet.
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