Allegro MicroSystems20-WFQFN Exposed PadRoHS
A4490EESTR-T
IC REG BUCK ADJ TRPL 20QFN
Category
Subcategory
Pmic Voltage Regulators Dc Dc Switching Regulators
Package
20-WFQFN Exposed Pad
Status
Active
$2.81 / unit (market reference)
MOQ: 1 pcs
Submit your quantity via the inquiry form for a competitive quote within 24 hours.
Parameters
| Parameter | Value |
|---|---|
| Brand | Allegro MicroSystems |
| Model | A4490EESTR-T |
| Package / Case | 20-WFQFN Exposed Pad |
| Mounting Type | Surface Mount |
| Operating Temperature | -40°C ~ 85°C (TA) |
| Topology | Buck |
| Voltage - Input (Min) | 4.5V |
| Voltage - Input (Max) | 34V |
| Voltage - Output | 0.8V |
| Frequency - Switching | 550kHz |
| Number of Outputs | 3 |
| Supplier Device Package | 20-QFN-EP (4x4) |
| RoHS | RoHS |
| Part Status | Active |
Application & Notes
A4490EESTR-T by Allegro MicroSystems is a Buck IC commonly used in power supply designs, battery-powered devices, and DC-DC conversion modules. Input voltage up to 34V, output 0.8V. The 20-WFQFN Exposed Pad package with surface mount mounting is standard for compact designs. Pay attention to input/output capacitor selection and PCB layout — switching regulators are sensitive to trace inductance.
You may also need
All Technical Specifications
| Function | Step-Down |
| Topology | Buck |
| Output Type | Adjustable |
| Number of Outputs | 3 |
| Output Configuration | Positive |
| Frequency - Switching | 550kHz |
| Synchronous Rectifier | No |
| Voltage - Input (Max) | 34V |
| Voltage - Input (Min) | 4.5V |
| Voltage - Output (Max) | 30.6V |
| Voltage - Output (Min/Fixed) | 0.8V |
Request a Quote
Submit your quantity and details — we will reply within 24 hours.