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A4491EESTR-T

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A4491EESTR-T

A4491EESTR-T

$2.41
  • Description：IC REG BUCK ADJ TRPL 20QFN
  • Series：-
  • Mfr：Allegro MicroSystems
  • Package：Tape & Reel (TR),Cut Tape (CT)

SKU:267124fae167 Category: Brand:

　　
  • Quantity
    • -
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Product Detailed Parameters

  • Description：IC REG BUCK ADJ TRPL 20QFN
  • Series：-
  • Mfr：Allegro MicroSystems
  • Package：Tape & Reel (TR),Cut Tape (CT)
  • 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°C ~ 85°C (TA)
  • Mounting Type：Surface Mount
  • Package / Case：20-WFQFN Exposed Pad
  • Supplier Device Package：20-QFN-EP (4x4)
  • Grade：-
  • Qualification：-

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A4491EESTR-T

How to buy
Online and offline orders are supported. If the item is available for online purchase, you can place it in the cart; for wholesale pricing, please contact our product manager for a quote.
Payment Method
Payment methods: T/T, WeChat Pay, credit cards, Google Pay, Apple Pay . Buyer covers shipping, fees, duties, and taxes; contact our product manager if you need a contract/procurement process.
Delivery time
In-stock items usually ship within 24 hours. Otherwise, shipment is arranged 1 to 2 days after the items arrive at our warehouse. Timing depends on destination and shipping method.
Freight calculation
Freight cost depends on destination, package size, and weight . We offer shipping options via DHL, FedEx, UPS, and TNT , and can ship using your freight account upon request.
Mode of Transportation
We ship via DHL, FedEx, UPS, and TNT. If you prefer a specific logistics provider, we can ship using your designated carrier.
Return and Refund
Returns are accepted within 60 days of invoice with RMA approval. Items must be resalable; original invoice and test report are required. No returns for customer errors.

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Buying Guide
Summary

Allegro MicroSystems A4491EESTR-T is an electronic component in Voltage Regulators - DC DC Switching Regulators category. Key specs: description: IC REG BUCK ADJ TRPL 20QFN; packaging: Tape & Reel (TR),Cut Tape (CT); temperature: -40°C ~ 85°C (TA); package/case: 20-WFQFN Exposed Pad; mounting: Surface Mount; frequency: 550kHz; output type: Adjustable.

Selection Notes
  • For A4491EESTR-T, confirm package/case 20-WFQFN Exposed Pad, mounting Surface Mount to ensure footprint compatibility.
  • For A4491EESTR-T, validate the operating temperature range (-40°C ~ 85°C (TA)) against your environment.
  • For A4491EESTR-T, confirm the operating frequency (550kHz) and any related tolerance requirements.
  • For A4491EESTR-T, match interface/output type (Adjustable) when selecting alternatives or second sources.
FAQ

What information do you need to quote A4491EESTR-T?
Send the part number (A4491EESTR-T), quantity, target delivery date, and any required packaging or documentation.

Who is the manufacturer/brand for A4491EESTR-T?
Allegro MicroSystems

What is the operating frequency of A4491EESTR-T?
550kHz

What is the output type of A4491EESTR-T?
Adjustable

Application Scenarios
Allegro MicroSystems A4491EESTR-T in the Voltage Regulators - DC DC Switching Regulators category is typically selected when engineers need predictable, spec-driven behavior in a production design. Well-chosen switching elements improve safety and reduce maintenance costs. They provide controlled switching for signals and power, enabling isolation, routing, and safe user interaction. In safety circuits, reliable switching prevents unintended motion during maintenance and fault conditions. In power routing, solid-state options reduce mechanical wear and enable faster fault response. Overall, it improves predictability by keeping key performance stable across manufacturing variance and operating conditions.
A4491EESTR-TA4491EESTR-T
$2.41
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