L4978

$3.06

Description：IC REG BUCK ADJ 2A 8DIP
Series：-
Mfr：STMicroelectronics
Package：Tube

SKU:198b62e61c33 Category: Voltage Regulators - DC DC Switching Regulators Brand: STMicroelectronics

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Product introduction

L4978 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 2A 8DIP. Review the specifications below when checking this part for your BOM.

Voltage Regulators - DC DC Switching Regulators specifications for L4978

Description：IC REG BUCK ADJ 2A 8DIP
Series：-
Mfr：STMicroelectronics
Package：Tube
Function：Step-Down
Output Configuration：Positive
Topology：Buck
Output Type：Adjustable
Number of Outputs：1
Voltage - Input (Min)：8V
Voltage - Input (Max)：55V
Voltage - Output (Min/Fixed)：3.3V
Voltage - Output (Max)：50V
Current - Output：2A
Frequency - Switching：100kHz ~ 300kHz
Synchronous Rectifier：No
Operating Temperature：-40°C ~ 150°C (TJ)
Mounting Type：Through Hole
Package / Case：8-DIP (0.300", 7.62mm)
Supplier Device Package：8-DIP
Grade：-
Qualification：-

Voltage Regulators - DC DC Switching Regulators datasheet and documents for L4978

L4978

Voltage Regulators - DC DC Switching Regulators Overview

The L4978 is a monolithic step-down switching regulator delivering up to 2A output current. It operates with an input voltage range of 8V to 55V and provides adjustable output voltages from 3.3V to 50V via an external divider. The device utilizes BCD mixed technology with an internal power D-MOS transistor featuring a typical Rds(on) of 0.25Ω. Switching frequency is adjustable up to 300kHz. It includes pulse-by-pulse current limiting, hiccup mode for short circuit protection, thermal shutdown, soft-start, and feedback disconnection protection.

Voltage Regulators - DC DC Switching Regulators Feature Summary

Integrated high-efficiency power D-MOS transistor for high switching speed
Pulse-by-pulse current limiting with hiccup mode for short circuit protection
Protection against feedback loop disconnection and thermal shutdown
Inhibit function enabling zero current consumption

Voltage Regulators - DC DC Switching Regulators Applications

General DC-DC step-down conversion
Industrial power supplies
Embedded systems requiring wide input voltage ranges

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific package variant required, as the L4978 series includes DIP-8 for standard assembly and SO16W for surface mount applications. Confirm that the selected component matches the intended thermal dissipation requirements given the maximum power constraints associated with the chosen package type. Ensure compatibility with the desired switching frequency settings.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component for applications requiring a wide input voltage range up to 55V and output currents up to 2A. Consider the available packages (DIP-8 or SO16W) based on assembly needs. Evaluate thermal management strategies, as maximum power dissipation limits must be observed when operating at higher frequencies or loads.

Voltage Regulators - DC DC Switching Regulators Part Context

The L4978 belongs to the L4978 family of step-down monolithic power switching regulators manufactured by STMicroelectronics. It is designed using BCD mixed technology to achieve high efficiency and performance in compact forms suitable for various power management applications.