L4971D

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L4971D

IC REG BUCK ADJ 1.5A 16SOIC

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規格

Package Tube
ProductStatus Active
Function Step-Down
OutputConfiguration Positive
Topology Buck
OutputType Adjustable
NumberofOutputs 1
Voltage-Input(Min) 8V
Voltage-Input(Max) 55V
Voltage-Output(Min/Fixed) 3.3V
Voltage-Output(Max) 50V
Current-Output 1.5A
Frequency-Switching 100kHz ~ 300kHz
SynchronousRectifier No
OperatingTemperature -40°C ~ 150°C (TJ)
MountingType Surface Mount
Package/Case 16-SOIC (0.295, 7.50mm Width)

概述

Description

The L4971D is an automotive-grade buck (step-down) switching regulator IC from STMicroelectronics. It’s designed to convert a wide automotive DC input into a stable lower rail for microcontrollers and peripherals in vehicles and harsh-environment electronics. Key features typically include: adjustable output via an external feedback network, current-mode PWM control, soft-start, enable input, overcurrent/short-circuit protection, undervoltage lockout, and thermal protection. It requires external passive components (inductor, input/output capacitors, and a diode or a synchronous stage) to form the regulator. Applications include automotive ECUs, infotainment, dashboards, and other power rails in cars and rugged equipment. For exact specifications (pinout, switching frequency, voltage ranges, packaging), consult the L4971D datasheet and application notes.

Package

L4971D comes in a Multiwatt-7 power package (7-pin with a heatsinking tab).

Pinout

- Pin count: 8 pins (D8/SO8 package)
- Function: Automotive-grade buck switching regulator with integrated high-side MOSFET. Converts high input voltage (up to ~40 V) to a lower output using external feedback, with current‑mode control and protections (enable, soft‑start, overcurrent, thermal/UVLO).

Manufacturer

- Manufacturer: STMicroelectronics (ST).
- What kind of company: A multinational electronics and semiconductor company, headquartered in Geneva, Switzerland, and one of the world's largest semiconductor manufacturers with operations worldwide.

Application

Applications:
- Automotive DC-DC converters (12/24 V input) for ECUs, infotainment and instrument clusters
- Industrial and telecom power supplies needing compact, efficient step-down regulation
- On-board regulators for consumer electronics and battery-powered devices (3.3/5 V rails)
- General-purpose embedded systems requiring reliable switching regulation

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動態主要裝載: 運費從25美元到45美元（0.5公斤）不等，預計交貨時間為2-5個工作日。

聯邦快遞: 運費從25美元到40美元（0.5公斤）不等，預計交貨時間為3-7個工作日。

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三硝基甲苯: 運費從25美元到65美元（0.5公斤）不等，預計交貨時間為3-7個工作日。

增强型短消息: 運費從30美元到50美元（0.5公斤）不等，預計交貨時間為7-15個工作日。

掛號: 運費為2-4美元（0.1公斤），預計交貨時間為5-20個工作日。

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