L4973V3.3

$2.40

Description：IC REG BUCK ADJ/0.5V 3.5A 18DIP
Series：-
Mfr：STMicroelectronics
Package：Tube

SKU:633c4265d4c1 Category: Voltage Regulators - DC DC Switching Regulators Brand: STMicroelectronics

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Product introduction

L4973V3.3 is listed in the Voltage Regulators - DC DC Switching Regulators range at ChipApex. The manufacturer field lists STMicroelectronics. Its product description is IC REG BUCK ADJ/0.5V 3.5A 18DIP. Review the specifications below when checking this part for your BOM.

Voltage Regulators - DC DC Switching Regulators specifications for L4973V3.3

Description：IC REG BUCK ADJ/0.5V 3.5A 18DIP
Series：-
Mfr：STMicroelectronics
Package：Tube
Function：Step-Down
Output Configuration：Positive
Topology：Buck
Output Type：Adjustable (Fixed)
Number of Outputs：1
Voltage - Input (Min)：8V
Voltage - Input (Max)：55V
Voltage - Output (Min/Fixed)：0.5V (3.3V)
Voltage - Output (Max)：50V
Current - Output：3.5A
Frequency - Switching：100kHz ~ 300kHz
Synchronous Rectifier：No
Operating Temperature：-40°C ~ 150°C (TJ)
Mounting Type：Through Hole
Package / Case：18-DIP (0.300", 7.62mm)
Supplier Device Package：18-DIP
Grade：-
Qualification：-

Voltage Regulators - DC DC Switching Regulators datasheet and documents for L4973V3.3

L4973V3.3

Voltage Regulators - DC DC Switching Regulators Overview

The L4973V3.3 is a step-down monolithic power switching regulator manufactured by STMicroelectronics. It delivers an output current of 3.5A at a fixed output voltage of 3.3V, utilizing a simple external divider for output adjustment. The device operates with an input voltage range of 8V to 55V and supports an adjustable output voltage from 0.5V to 50V. It features a switching frequency of 100 kHz and is housed in an 18-pin PDIP package.

Voltage Regulators - DC DC Switching Regulators Feature Summary

Monolithic step-down switching regulator design
High input voltage capability up to 55V
Fixed 3.3V output option with external divider support
Integrated thermal protection mechanisms

Voltage Regulators - DC DC Switching Regulators Applications

Industrial control systems
Battery-powered equipment
General-purpose DC-DC conversion

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix (V3.3) against the manufacturer's official datasheet to confirm the fixed 3.3V output configuration and 18-pin PDIP packaging. Ensure compatibility with the required input voltage range of 8V to 55V and the 3.5A load requirement. Cross-reference the part number with authorized distributors to avoid counterfeit components.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a robust buck converter is needed for high-input voltage applications requiring up to 3.5A. The fixed 3.3V output simplifies design compared to fully adjustable variants. Consider the through-hole PDIP package if PCB space allows, as surface-mount alternatives may differ in pin count or thermal performance.

Voltage Regulators - DC DC Switching Regulators Part Context

The L4973 series comprises step-down switching regulators designed for high-current applications. The V3.3 variant specifically provides a stable 3.3V output, distinguishing it from other versions like the 5.1V option. It belongs to STMicroelectronics' portfolio of power management ICs aimed at industrial and consumer electronics.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Consult the manufacturer's official replacement guide for equivalent devices.

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