Mfr Part #:

A4490EESTR-T

The Allegro Microsystems A4490EESTR-T is an adjustable triple output buck switching regulator. It operates with a 4.5V input voltage and a frequency of 550kHz.

✓ Total Stock: 38,121 pcs

$ Price Range: $0.16

A4490EESTR-T Available from 4 distributors

✓ Authorised

✓ Non-Authorised

Distributor		Stock	Pricing	MOQ	PKG	Lead Time	Date Code	On Order Quantity	On Order Delivery
Components Technology Group, Inc. ✓ Non-Authorised Inventory information	24,000 pcs On Request	24000 pcs	On Request	1	On Request	On Request	On Request	On Request	On Request
Risen Electronics ✓ Non-Authorised Inventory information	10,000 pcs On Request	10000 pcs	On Request	1	On Request	On Request	On Request	On Request	2026-02-16 21:33:16
Optech Co.,Limited ✓ Non-Authorised Inventory information	3,034 pcs On Request	3034 pcs	On Request	1	On Request	On Request	21+	On Request	On Request
Smaxon Electronics ✓ Non-Authorised Inventory information	1,087 pcs On Request	1087 pcs	On Request	1	On Request	On Request	14+	On Request	On Request

A4490EESTR-T Description

Short technical summary and product information.

The Allegro Microsystems A4490EESTR-T is a versatile switching regulator designed for step-down (buck) applications. This device features an adjustable output configuration and supports up to three outputs.

Key electrical characteristics include a 4.5V operating voltage and a switching frequency of 550kHz. The regulator is designed for positive output configurations and operates within a temperature range of -40°C to 85°C.

Packaged in a 20-WFQFN Exposed Pad (4x4) format, the A4490EESTR-T is suitable for surface mount applications. Its RoHS3 compliance indicates adherence to environmental standards.

This component is ideal for power management circuits requiring efficient voltage regulation in a compact form factor.

A4490EESTR-T Quick Information

Product Type: Switching Regulator

Canonical Name: Allegro Microsystems A4490EESTR-T Adjustable Triple Output Buck Switching Regulator

Subcategory: DC-DC Switching Regulator

A4490EESTR-T Compliance

RoHS Status: RoHS Compliant

Moisture Sensitivity Level (MSL): 1 Unlimited

REACH Status: REACH Unaffected

A4490EESTR-T Estimated Pricing

Qty	Low	High
1+	$0.16	$0.16

Estimated market price range - modelled values for guidance only, not live distributor offers.

A4490EESTR-T Features

Adjustable triple output buck regulator.
Operates at 4.5V input voltage.
550kHz switching frequency.
Surface mountable 20-WFQFN package.
RoHS3 compliant.

A4490EESTR-T Applications

Power management circuits.
Step-down voltage regulation.
Designs requiring multiple outputs.
Compact electronic systems.

A4490EESTR-T FAQs

7 frequently asked questions generated from this part’s specifications.

What is the operating voltage of the A4490EESTR-T?

4.5V.

What package does the A4490EESTR-T come in?

20-WFQFN Exposed Pad (20-QFN-EP 4x4).

What is the operating temperature range of the A4490EESTR-T?

-40°C to 85°C.

How many outputs does the A4490EESTR-T have?

Three adjustable outputs.

What is the output type of the A4490EESTR-T?

Adjustable positive output.

What is the switching frequency of the A4490EESTR-T?

550kHz.

What topology does the A4490EESTR-T use?

Buck (step-down) topology.

A4490EESTR-T Alternate Parts

Same form/fit/function or matching attribute configuration across different manufacturers.

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A4491EESTR-T

Allegro Microsystems

The Allegro MicroSystems A4491EESTR-T is a step-down DC-DC switching regulator. It offers adjustable triple positive outputs and operates at 550kHz.

View Part

Category	Voltage Regulators - DC DC Switching Regulators
Manufacturer Name	Allegro Microsystems
Frequency	550kHz
Function	Step-Down
Mounting Type	Surface Mount
Number of Outputs	3
Operating Temperature	-40°C ~ 85°C
Output Configuration	Positive
Output Type	Adjustable
Supplier Device Package	20-QFN-EP (4x4)
Synchronous Rectifier	No
Topology	Buck
Voltage	4.5V