STMicroelectronics18-DIP (0.300", 7.62mm)RoHS
L4973V3.3
IC REG BUCK ADJ/3.3V 3.5A 18DIP
Category
Subcategory
Pmic Voltage Regulators Dc Dc Switching Regulators
Package
18-DIP (0.300", 7.62mm)
Status
Active
$4.85 / unit (market reference)
MOQ: 1 pcs
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Parameters
| Parameter | Value |
|---|---|
| Brand | STMicroelectronics |
| Model | L4973V3.3 |
| Package / Case | 18-DIP (0.300", 7.62mm) |
| Mounting Type | Through Hole |
| Operating Temperature | -40°C ~ 150°C (TJ) |
| Topology | Buck |
| Voltage - Input (Min) | 8V |
| Voltage - Input (Max) | 55V |
| Voltage - Output | 0.5V (3.3V) |
| Current - Output | 3.5A |
| Frequency - Switching | 100kHz ~ 300kHz |
| Number of Outputs | 1 |
| Supplier Device Package | 18-DIP |
| RoHS | RoHS |
| Part Status | Active |
Application & Notes
L4973V3.3 by STMicroelectronics is a Buck IC commonly used in power supply designs, battery-powered devices, and DC-DC conversion modules. Input voltage up to 55V, output 0.5V (3.3V). The 18-DIP (0.300", 7.62mm) 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.
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All Technical Specifications
| Function | Step-Down |
| Topology | Buck |
| Output Type | Adjustable (Fixed) |
| Current - Output | 3.5A |
| Number of Outputs | 1 |
| Output Configuration | Positive |
| Frequency - Switching | 100kHz ~ 300kHz |
| Synchronous Rectifier | No |
| Voltage - Input (Max) | 55V |
| Voltage - Input (Min) | 8V |
| Voltage - Output (Max) | 50V |
| Voltage - Output (Min/Fixed) | 0.5V (3.3V) |
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